Document:

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                                                                     EXHIBIT 4.3

          Certificate of Amendment of the Certificate of Incorporation

                                       of

                  CHROMATICS COLOR SCIENCES INTERNATIONAL, INC.

                Under Section 805 of the Business Corporation Law

                                ----------------

                  It is hereby certified that:

                  FIRST:   The name of the corporation (the "Corporation") is
CHROMATICS COLOR SCIENCES INTERNATIONAL, INC.

                  SECOND:  The Certificate of Incorporation of the Corporation
was filed by the Department of State on March 30, 1984. The Corporation was
formed under the name Chromatics International, Inc.

                  THIRD:   The Certificate of Incorporation of the Corporation,
as heretofore amended, is hereby further amended to fix the relative rights,
preferences and limitations with respect to the Class B Preferred Stock of the
Corporation.

                  FOURTH:  To accomplish the foregoing,

                  (i)      Section 4 of Paragraph D of Article FOURTH of the
Certificate of Incorporation of the Corporation is hereby amended to read in
full as follows:

"4.      Class B Series 3 Preferred Stock:

                  (1)      The Corporation has authorized the creation of a
series of Class B Preferred Stock to be designated "Class B Series 3 Convertible
Preferred Stock" (the "Series 3 Preferred Stock").

                  (2)      The number of shares constituting the Series 3
Preferred Stock shall be fixed at 40,000. The Series 3 Preferred Stock shall
have no par value.

                  (3)      The shares of Series 3 Preferred Stock shall, with
respect to the distribution of assets on liquidation, dissolution or winding up
of the Corporation, rank (i) senior and prior to the common stock, $.001 par
value (the "Common Stock"), of the Corporation and any other class or series of
capital stock of the Corporation hereafter issued, the terms of which
specifically provide that shares of such class or series shall rank junior to
shares of Series 3 Preferred Stock (collectively, the "Junior Securities"), (ii)
on a parity with any other class or series of capital stock of the Corporation
hereafter issued, the terms of which specifically provide that shares of such
class or series shall rank on a parity with the shares of Series 3 Preferred
Stock (collectively, the "Parity Securities") and (iii) junior to the Class A
Convertible Preferred Stock and any other class or series of capital stock of
the Corporation hereafter issued, the terms

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of which specifically provide that shares of such class or series shall rank
senior to shares of Series 3 Preferred Stock (collectively, the "Senior
Securities").

                  (4)      The holders of shares of Series 3 Preferred Stock
shall not be entitled to any voting rights other than those provided by law.
However, so long as any shares of Series 3 Preferred Stock are outstanding, the
Corporation shall not and shall cause its subsidiaries not to, without the
affirmative vote of the holders of a majority of the shares of the Series 3
Preferred Stock then outstanding, (a) alter or change adversely the absolute or
relative powers, preferences or rights given to the Series 3 Preferred Stock,
(b) alter or amend this Certificate of Amendment, (c) authorize or create any
class of stock ranking as to dividends or distribution of assets upon a
liquidation or otherwise senior to the Series 3 Preferred Stock, (d) amend its
Certificate of Incorporation, bylaws or other charter documents so as to affect
adversely any rights of any holders of Series 3 Preferred Stock, (e) increase
the authorized number of shares of Series 3 Preferred Stock or (f) enter into
any agreement with respect to the foregoing.

                  (5)      Except as set forth in Section 7 hereof, the holders
of shares of Series 3 Preferred Stock shall not be entitled to receive dividends
with respect thereto.

                  (6)      (a) In the event of any voluntary or involuntary
liquidation, dissolution or winding up of the affairs of the Corporation, before
any distribution or payment shall be made to the holders of outstanding Junior
Securities, including, but not limited to, the Common Stock, the holders of
outstanding shares of Series 3 Preferred Stock shall be entitled to receive, out
of the assets of the Corporation at the time legally available therefor, in
exchange for their shares of Series 3 Preferred Stock an amount in cash equal to
$100.00 per share of Series 3 Preferred Stock, together with all accrued but
unpaid dividends thereon, on a pari passu basis with the rights of the holders
of any Parity Securities; provided, however, that the holders of the Series 3
Preferred Stock and any outstanding Parity Securities shall not be entitled to
receive such preferential liquidation payments until the preferential
liquidation payments on all outstanding Senior Securities have been paid in
full. If, upon any such voluntary or involuntary liquidation, dissolution or
winding up of the affairs of the Corporation, the assets of the Corporation
available therefor shall be insufficient to permit the payment in full to the
holders of outstanding shares of Series 3 Preferred Stock of the preferential
liquidation amounts to which they are then entitled pursuant to the provisions
of this clause (a), the entire assets of the Corporation thus distributable
shall be distributed among the holders of outstanding shares of Series 3
Preferred Stock and any Parity Securities ratably, in proportion to the full
amounts to which such holders would otherwise be entitled if such assets were
sufficient to permit payment in full.

                  (b)      Upon any such voluntary or involuntary liquidation,
dissolution or winding up of the affairs of the Corporation, after the payment
in full to the holders of outstanding shares of Series 3 Preferred Stock and any
Parity Securities of the preferential liquidation amounts to which they are then
entitled pursuant to the provisions of clause (a) above, the holders of
outstanding shares of Series 3 Preferred Stock shall not be entitled to
participate in any further distributions made to the holders of the Common Stock
or any other class of Senior Securities or Junior Securities.

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                  (c)      At the option of the holders of a majority of the
issued and outstanding Series 3 Preferred Stock, the sale of all or
substantially all of the assets of the Corporation or the merger of the
Corporation with or into another corporation shall be deemed to be a
dissolution, liquidation or winding up of the Corporation.

                  (7)      (a) On the third anniversary of the date of initial
issuance of the shares of Series 3 Preferred Stock (the "Redemption Date"), and
provided the Corporation has not delivered a timely Extension Notice (as
hereinafter defined), all of the outstanding shares of Series 3 Preferred Stock
shall be subject to mandatory redemption by the Corporation for shares of the
Corporation's Common Stock (the "Redemption Shares") at the Redemption Ratio (as
hereinafter defined). As used herein, "Redemption Ratio" shall equal the number
of shares of Common Stock into which one share of Series 3 Preferred Stock is
convertible pursuant to this Section 7(a), which shall be determined by dividing
$115.00 by the then effective Conversion Price (as hereinafter defined). The
Redemption Ratio shall be subject to adjustment as provided in Section 8(d).

                  (b)      From and after the Redemption Date, unless (i)
default shall be made by the Corporation on the Redemption Date in delivering to
the holders of the shares of Series 3 Preferred Stock the certificate or
certificates representing the Redemption Shares, or (ii) the Corporation, in its
sole discretion, has notified the holders of the shares of Series 3 Preferred
Stock by written notice delivered at least thirty (30) days prior to the
Redemption Date (the "Extension Notice") of its election to extend the
Redemption Date to the fifth anniversary of the date of initial issuance of the
shares of Series 3 Preferred Stock (the "Extended Redemption Date"), all rights
of the holders of the shares of Series 3 Preferred Stock surrendered for
redemption, except the right to receive the Redemption Shares in respect of such
shares, shall cease and terminate. The redemption of the shares of Series 3
Preferred Stock upon the Redemption Date shall take place at the principal place
of business of the Corporation. On the Redemption Date, the Corporation shall
tender the certificate or certificates representing the Redemption Shares
against receipt of the certificate or certificates representing the shares of
Series 3 Preferred Stock being redeemed.

                  (c)      If the Redemption Date has been extended to the
Extended Redemption Date by timely delivery by the Corporation of the Extension
Notice to each of the holders of the shares of Series 3 Preferred Stock then
outstanding, on the Extended Redemption Date all of the outstanding shares of
Series 3 Preferred Stock shall be subject to mandatory redemption by the
Corporation for Redemption Shares at the Extended Redemption Ratio (as
hereinafter defined). From and after the Extended Redemption Date, unless
default shall be made by the Corporation on the Extended Redemption Date in
delivering to the holders of Series 3 Preferred Stock the certificate or
certificates representing the Redemption Shares, all rights of the holders of
the shares of Series 3 Preferred Stock surrendered for redemption, except the
right to receive the Redemption Shares in respect of such shares, shall cease
and terminate. The redemption of the shares of Series 3 Preferred Stock upon the
Extended Redemption Date shall take place at the principal place of business of
the Corporation. On the Extended Redemption Date, the Corporation shall tender
the certificate or certificates representing the Redemption Shares against
receipt of the certificate or certificates representing the shares of Series 3
Preferred Stock being redeemed. As used herein, "Extended Redemption Ratio"
shall equal the number of shares of

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Common Stock into which one share of Series 3 Preferred Stock is convertible
pursuant to this Section 7(c), which shall be determined by dividing $131.00 by
the then effective Conversion Price. The Extended Redemption Ratio shall be
subject to adjustment as provided in Section 8(d).

                  (8)      (a) Subject to the provision for adjustment set forth
below, each share of the Series 3 Preferred Stock shall be convertible at the
option of the holder thereof at any time after the date hereof, into a number of
shares of Common Stock equal to the then effective Conversion Ratio (as
hereinafter defined). As used herein, "Conversion Ratio," determined as of any
date, shall equal the number of shares of Common Stock into which one share of
Series 3 Preferred Stock is convertible pursuant to this Section 8, which shall
be determined by dividing $100.00 by the then effective Conversion Price.
"Ratio" shall mean the Conversion Ratio, the Redemption Ratio or the Extended
Redemption Ratio, as the case may be, and shall be subject to adjustment as
provided in Section 8(d). "Conversion Price" shall be $4.68, subject to
adjustment as provided in Section 8(d).

                  (b)      The Corporation shall at all times reserve and keep
available for issuance upon the conversion of Series 3 Preferred Stock, free
from any preemptive rights or any other actual contingent purchase rights of
persons other than the holders of Series 3 Preferred Stock, such number of
shares of its authorized but unissued shares of Common Stock as will from time
to time be necessary to permit the conversion of all outstanding shares of
Series 3 Preferred Stock into shares of Common Stock, and shall take all action
required to increase the authorized number of shares of Common Stock if
necessary to permit the conversion of all outstanding shares of Series 3
Preferred Stock. The Corporation covenants that all shares of Common Stock that
shall be so issuable shall, upon issue, be duly and validly authorized, fully
paid, nonassessable and freely tradeable.

                  (c)      (i) Conversion of Series 3 Preferred Stock may be
effected by any holder thereof upon the surrender to the Corporation at the
offices of the Corporation of certificates representing Series 3 Preferred Stock
to be converted, accompanied by a written notice stating that such holder elects
to convert all or a specified portion of such Series 3 Preferred Stock in
accordance with the provisions of this Section 8 and specifying the name or
names in which such holder wishes the certificate or certificates for shares of
Common Stock to be issued. The Corporation shall pay the issue and transfer
taxes that may be payable in respect of any issue or delivery of shares of
Common Stock on conversion of Series 3 Preferred Stock pursuant hereto. As
promptly as practicable, and in any event within two business days after the
surrender of such certificates representing Series 3 Preferred Stock and the
receipt of such notice relating thereto, the Corporation shall deliver or cause
to be delivered (i) certificates representing the number of validly issued,
fully paid and nonassessable shares of Common Stock to which the holder of
Series 3 Preferred Stock being converted shall be entitled and (ii) if less than
all of the shares represented by the surrendered certificates are being
converted, a new certificate representing the number of shares of Series 3
Preferred Stock which remains outstanding upon such partial conversion. Such
conversion shall be deemed to have been made at the close of business on the
date of giving such notice so that the rights of the holder thereof as to Series
3 Preferred Stock being converted shall cease except for the right to receive
shares of Common Stock in

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accordance herewith, and the persons entitled to receive shares of Common Stock
shall be treated for all purposes as having become the record holder of such
shares of Common Stock at such time.

                  (ii)     If the Corporation fails to deliver to the holder the
Common Stock certificate or certificates to which it is entitled pursuant to
Section 7 or Section 8, including for purposes hereof, for any Redemption
Shares, on or prior to the third trading day after the date the holder
surrenders to the Corporation the certificates to be converted (the "Delivery
Date"), in addition to all other remedies that such holder may pursue hereunder
or otherwise, the Corporation shall pay to such holder in cash, as liquidated
damages and not as a penalty, $1,000 per day (increasing to $5,000 per day after
the fifth trading day after the Delivery Date) until such certificates are
delivered. Nothing herein shall limit a holder's right to pursue actual damages
for the Corporation's failure to deliver certificates representing shares of
Common Stock upon conversion within the period specified herein (including,
without limitation, damages relating to any purchase of shares of Common Stock
by such holder to make delivery on a sale effected in anticipation of receiving
certificates representing shares of Common Stock upon conversion, such damages
to be in an amount equal to (A) the aggregate amount paid by such holder for the
shares of Common Stock so purchased minus (B) the aggregate amount of net
proceeds, if any, received by such holder from the sale of the shares of Common
Stock issued by the Corporation pursuant to such conversion), and such holder
shall have the right to pursue all remedies available to it at law or in equity
(including, without limitation, a decree of specific performance and/or
injunctive relief).

                  (iii)    In addition to any other rights available to the
holder, if the Corporation fails to deliver to the holder such certificate or
certificates pursuant to Section 8(c)(ii) by the Delivery Date and after the
Delivery Date the holder purchases (in an open market transaction or otherwise)
shares of Common Stock to deliver to the satisfaction of a sale by such holder
of the shares underlying the Series 3 Preferred Stock which the holder
anticipated receiving on the Delivery Date upon such conversion (a "Buy-In"),
then the Corporation shall pay in cash to the holder (in addition to any
remedies available to or elected by the holder) the amount by which (A) the
holder's total purchase price (including brokerage commissions, if any) for the
shares of Common Stock purchased for a Buy-In exceeds (B) the aggregate
Conversion Price for the number of shares of Common Stock in the Buy-In for
which such conversion was not timely honored. For example, if the holder
purchases shares of Common Stock having a total purchase price of $11,000 to
cover a Buy-In with respect to an attempted conversion of $10,000 aggregate
Conversion Price for the number of shares of Common Stock in the Buy-In, the
Corporation shall be required to pay the holder $1,000. The holder shall provide
the Corporation written notice indicating the amounts payable to the holder in
respect of the Buy-In.

                  (d)      (i) In the event of any change in the number of
issued and outstanding shares of capital stock of the Corporation by reason of
any stock split, stock dividend, subdivision, merger, consolidation,
recapitalization, combination, conversion or exchange of shares, or any other
change in the corporate or capital structure of the Corporation which would have
the effect of diluting or otherwise adversely affecting the rights and
privileges of the holders of Series 3 Preferred Stock under this Section 8, the
Ratio and Conversion Price in effect on the effective date thereof shall be
adjusted so that the holder of any shares of Series 3

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Preferred Stock shall be entitled to receive the number and type of shares of
Common Stock or other securities of the Corporation which such holder would have
owned or have been entitled to receive after the happening of any of the events
described above had such shares of Series 3 Preferred Stock been converted into
Common Stock immediately prior to the happening of such event or the record date
therefor. An adjustment made pursuant to this Section 8(d) shall become
effective (x) in the case of any such dividend or distribution to holders of
shares of Common Stock entitled to receive such dividend or distribution, or (y)
in the case of such subdivision, merger, consolidation, recapitalization,
combination, conversion or exchange, at the close of business on the day upon
which such corporate action becomes effective.

                  (ii)     Except with respect to Excluded Securities (as
defined below), in case the Corporation shall issue any shares of Common Stock
or Common Stock Equivalents (as defined below) after the Issue Date at a price
per share (or having a conversion or exercise price per share) of less than the
Conversion Price per share (the "Adjusted Conversion Price"), in each such case
the Conversion Price as in effect immediately prior thereto shall be reduced
(but not increased) to the Adjusted Conversion Price and the Ratio shall be
recalculated and increased (but not decreased) by substituting the Adjusted
Conversion Price for the Conversion Price in the Ratio calculation. Any
adjustment made pursuant to this clause (ii) shall be made on the next business
day following the date on which any such issuance is made and shall be effective
retroactively to the close of business on the date of such issuance. For
purposes of this clause (ii), the consideration receivable by the Corporation in
connection with the issuance of additional shares of Common Stock or of Common
Stock Equivalents since the Issue Date shall be deemed to be equal to (X) in the
case the consideration received by the Corporation is cash, the sum of the
aggregate offering price (before deduction of underwriting discounts or
commissions and expenses payable to third parties, if any) of all such Common
Stock and/or Common Stock Equivalents plus the minimum aggregate amount, if any,
payable upon conversion, exchange or exercise of any such Common Stock
Equivalents, and (Y) in the case the consideration received by the Corporation
is other than cash, the fair market value of the consideration received by the
Corporation as determined by the good faith judgment of the Board of Directors
of the Corporation provided, however, that in the event the holder disagrees in
good faith with the determination of the Board of Directors of the Corporation,
such fair market value shall be determined by a nationally recognized or major
regional investment banking firm or firm of independent certified public
accountants of recognized standing (an "Appraiser") selected in good faith by
the holders of the Series 3 Preferred Stock; and provided, further, that the
Corporation, after receipt of the determination by such Appraiser shall have the
right to select in good faith an additional Appraiser meeting the same
qualifications, in which case the fair market value shall be equal to the
average of the determinations by each such Appraiser. Such adjustment shall be
made whenever any such distribution is made and shall become effective
immediately after the record date mentioned above. The issuance or reissuance of
any shares of Common Stock or Common Stock Equivalents (whether treasury shares
or newly issued shares) pursuant to a dividend or distribution on, or
subdivision, combination or reclassification of, the outstanding shares of
Common Stock requiring an adjustment in the Conversion Price and Ratio pursuant
to this clause (ii) shall not be deemed to constitute an issuance of Common
Stock or Common Stock Equivalents by the Corporation to which clause (i) of this
Section 8(d) applies. Upon the expiration or termination of any unconverted,
unexchanged or unexercised Common Stock Equivalents for which an adjustment has
been made pursuant to this clause (ii), the

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adjustments shall forthwith be reversed to effect such Ratio as would have been
in effect at the time of such expiration or termination had such Common Stock
Equivalents, to the extent outstanding immediately prior to such expiration or
termination, had never been issued. As used herein, "Excluded Securities" shall
mean: (i) shares of Common Stock issuable upon conversion of the Series 3
Preferred Stock; (ii) shares of Common Stock issuable or issued to employees of
or consultants to the Corporation pursuant to the Management Option Plan (as
hereinafter defined); (iii) any capital stock issued as a stock dividend or upon
any stock split or other subdivision or combination of shares of the
Corporation's capital stock; (iv) shares of Common Stock issuable upon
conversion of any Common Stock Equivalents outstanding on the Issue Date, (v)
shares of Common Stock issuable upon conversion of the Corporation's Class A
Convertible Preferred Stock outstanding on the Issue Date or (vi) Common Stock
issued upon the conversion or exercise of Common Stock Equivalents issued after
the Issue Date as to which an adjustment to the Ratio has been made pursuant to
this clause (d) upon the issuance of such Common Stock Equivalents. As used
herein, "Common Stock Equivalents" shall mean securities convertible into, or
exchangeable or exercisable for, shares of Common Stock of the Corporation. As
used herein, the "Management Option Plan" shall mean the Corporation's 1992
Stock Option Plan, as amended.

                  (iii)    If the Corporation shall set a record date for the
holders of its Common Stock for the purpose of entitling them to receive a
dividend or other distribution and shall thereafter, and before such dividend or
distribution is paid or delivered to stockholders entitled thereto, legally
abandon its plan to pay or deliver such dividend or distribution, then no
adjustment in the Ratio or the Conversion Price then in effect shall be made by
reason of the taking of such record, and any such adjustment previously made as
a result of the taking of such record shall be reversed.

                  (e)      (i) Unless sooner redeemed or converted in accordance
with the provisions of Section 7 hereof or this Section 8 the outstanding shares
of Series 3 Preferred Stock shall be subject to involuntary conversion at the
option of the Corporation, at its sole discretion, in whole but not in part, at
any time after six months after the Issue Date, for shares of the Corporation's
Common Stock at the Conversion Ratio. The Corporation may effectuate such
involuntary conversion on such date (the "Involuntary Conversion Date") provided
that the following conditions have been met:

         (A)      the Current Market Price (as hereinafter defined) of the
                  Common Stock is equal to or in excess of one hundred and fifty
                  percent (150%) of the Conversion Price for a period of at
                  least ten (10) consecutive trading days; and

         (B)      all of the shares of Common Stock into which the Preferred
                  Stock is being converted have been registered under the
                  Securities Act of 1933, as amended, and such registration has
                  been declared effective by the Securities and Exchange
                  Commission, and is effective on such date; and

         (C)      the Corporation has a sufficient number of authorized shares
                  of Common Stock reserved for issuance upon full conversion of
                  the Series 3 Preferred Stock.

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As used herein, "Current Market Price" shall mean for any day, the last sale
price for the Common Stock on the principal securities exchange on which the
Common Stock is listed or admitted to trading, or, if not so listed or admitted
to trading on any securities exchange, the last sale price for the Common Stock
on the National Association of Securities Dealers National Market System, or, if
the Common Stock shall not be listed on such system, the closing bid price in
the over-the-counter market.

                  (ii)     Notice of involuntary conversion of outstanding
shares of Series 3 Preferred Stock shall be sent by or on behalf of the
Corporation, postage prepaid, to the holders of record of outstanding shares of
Series 3 Preferred Stock not less than ten (10) and not more than twenty (20)
days prior to the Involuntary Conversion Date.

                  (iii)    Notice having been so given as provided in clause
(ii) above, from and after the Involuntary Conversion Date, unless default shall
be made by the Corporation on the Involuntary Conversion Date in issuing the
Common Stock issuable upon conversion of the Series 3 Preferred Stock pursuant
to the Conversion Ratio, all rights of the holders of the shares of Series 3
Preferred Stock surrendered for conversion, except the right to receive the
Common Stock in respect of such shares, shall cease and terminate. The
involuntary conversion of the shares of Series 3 Preferred Stock for the Common
Stock upon the Involuntary Conversion Date shall take place at the principal
place of business of the Corporation. On the Involuntary Conversion Date, the
Corporation shall tender such Common Stock against receipt of the certificate or
certificates representing the shares of Series 3 Preferred Stock being
converted.

                  (9)      Upon any adjustment of the Conversion Price and the
Ratio then in effect pursuant to the provisions of Section 8, then, and in each
such case, the Corporation shall promptly deliver to each of the holders of
Series 3 Preferred Stock a certificate signed by the President or a Vice
President and by the Treasurer or an Assistant Treasurer or the Secretary or an
Assistant Secretary of the Corporation setting forth in reasonable detail the
event requiring the adjustment, the method by which such adjustment was
calculated and the Conversion Price and Ratio then in effect following such
adjustment. Where appropriate, such notice to the holders of Series 3 Preferred
Stock may be given in advance. "

                  FIFTH:   The foregoing Amendment of the Certificate of
Incorporation of the Corporation was authorized by unanimous consent of the
Board of Directors of the Corporation.

Signed on November 1, 2000
                                    ----------------------------
                                      Darby S. Macfarlane
                                      Chairperson of the Board

                                       8<PAGE>   1
                                                                     EXHIBIT 4.4

                                October 11, 2000

LBI Group Inc.
3 World Financial Center
New York, New York  10285

Dear Sirs:

              Reference is made to that certain Preferred Stock Purchase
Agreement, dated as of February 11, 2000, by and between Chromatics Color
Sciences International, Inc. (the "Company") and LBI Group Inc. (the
"Purchaser"), that certain Warrant Agreement, dated as of February 11, 2000 (the
"2000 Warrant Agreement"), by and between the Company and the Purchaser, that
certain Preferred Stock Purchase Agreement, dated as of June 11, 1999, by and
between the Company and the Purchaser, that certain Warrant Agreement, dated as
of June 11, 1999 (the "1999 Warrant Agreement"), by and between the Company and
the Purchaser, that certain Letter Agreement, dated as of August 16, 2000, by
and between the Company and the Purchaser (the "Lehman Letter Agreement"), and
the Certificate of Incorporation of the Company (the "Certificate of
Incorporation" and, together with the 2000 Warrant Agreement and the 1999
Warrant Agreement, the "Lehman Agreements"). Capitalized terms used but not
defined herein shall have the meanings assigned to such terms in the Lehman
Agreements.

              The Company proposes to enter into a purchase and sale agreement
(the "Crescent Agreement") with Crescent International Ltd. ("Crescent"),
pursuant to which the Company would issue and sell to Crescent, and Crescent
would purchase, shares of a newly-authorized series of preferred stock of the
Company (the "Crescent Preferred") for an aggregate purchase price of up to
Four Million Dollars ($4,000,000).

              With respect to the foregoing, the Company and the Purchaser agree
as follows:

              1.     Amendment to the Purchase Agreements.  The Company and the
Purchaser hereby agree to amend Section 6.1(d) of each of the Purchase
Agreements to read in full as follows:

                        "(d) If (i) the Registration Statement is not (A) filed
              with the SEC on or before the Filing Date or (B) declared
              effective by the SEC on or before the Effectiveness Date (or in
              the case of delay in the effectiveness of the Registration
              Statement caused by "plain english" comments on the Registration
              Statement from the staff of the SEC, the thirtieth (30th) day
              after the Effectiveness Date), (ii) on any day after the
              Registration Statement has been declared effective by the SEC (A)
              sales of the Registrable Securities required to be included on the
              Registration Statement cannot be made pursuant to the Registration
              Statement (including, without limitation, because of a failure to
              keep the Registration Statement effective, to disclose such
              information as is necessary for sales to be made pursuant to the
              Registration Statement, or to
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          register sufficient shares of Common Stock) or (ii) Seller shall
          otherwise fail to file the Registration Statement (each such event
          specified in (i), (ii) and (iii) above, an "Event"), then as partial
          relief for the damages to Purchaser by reason of any such delay in or
          reduction of its ability to sell the Registrable Securities (which
          remedy shall not be exclusive of any other remedies available at law
          or in equity).  (y) Seller shall pay to Purchaser an amount in cash
          (a "Registration Delay Payment") equal to two percent (2%) of the
          product of (I) the number of Shares held by Purchaser and (II) $100,
          multiplied by the sum of: (i) the number of months (prorated for
          partial months) after the end of the Effectiveness Date and prior to
          the date the Registration Statement is declared effective by the SEC;
          provided, however, that there shall be excluded from such period any
          delays which are solely attributable to changes required by Purchaser
          in the Registration Statement with respect to information relating to
          Purchaser and (ii) the number of months (prorated for partial months)
          that sales cannot by made pursuant to the Registration Statement
          after the Registration Statement has been declared effective; and (z)
          the Conversion Price (as defined in the Certificate of Amendment) of
          the Shares and the Exercise Price (as defined in the Warrant
          Agreement) shall be decreased 2% on the date of such Event and shall
          be decreased an additional 2% as of each monthly anniversary of the
          date of such Event.  Seller shall pay any required Registration Delay
          Payment to Purchaser in cash on the last business day of each month
          during which an Event has occurred and is continuing.  In the event
          seller fails to make a Registration Delay Payment in a timely manner
          such Registration Delay Payment shall bear interest at the rate of
          2.0% per month (prorated for partial months) until paid in full."

          2. Amendment to Certificate of Incorporation. The Company and
Purchaser hereby agree to amend the Certificate of Incorporation of the Company
as it pertains to the Class B Series 2 Convertible Preferred Stock and Class B
Series 3 Convertible Preferred Stock, in the forms attached hereto as Exhibit A
and Exhibit B, upon the execution and delivery of this Agreement by the parties
hereto.

          3. Waiver. The Purchaser hereby irrevocably agrees to waive any right
claim that it may have to decrease the Conversion Price of the Series 2
Preferred Stock, the Conversion Price of the Series 3 Preferred Stock and the
Exercise Price per Warrant Share solely in connection with (i) the issuance of
the Crescent Preferred pursuant to the transaction contemplated by the Crescent
Agreement, (ii) the issuance of the New Warrants (hereinafter defined) and
(iii) the Warrant Shares vesting and becoming exercisable on the First Vesting
Date (as such terms are defined in the Adjustable Warrant, dated August 16,
2000 (the "Adjustable Warrant"), issued by the Company to Millennium Partners,
L.P. ("Millennium")).  The Purchaser further irrevocably agrees to waive any
right or claim that it may have to deem or define the

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exercise price with respect to the Warrant Shares vesting and becoming
exercisable on the Second Vesting Date (as such term is defined in the
Adjustable Warrant) to be other than the greater of (i) $1.00 and (ii) the
exercise price calculated in the manner set forth in Paragraph 1 of the
Lehman Letter Agreement.

         4. Warrants.  In consideration of the Purchaser's promises and
covenants contained herein, the Company agrees to issue to the Purchaser 200,000
five-year warrants (the "New Warrants") to purchase the Common Stock of the
Company, at an exercise price of $1.50 per share, in substantially such form and
content as the Warrants issued to the Purchaser pursuant to the 1999 Warrant
Agreement and the 2000 Warrant Agreement.

         5. Ratification of the Purchase Agreements.  By the execution and
delivery hereof, each of the parties hereto hereby ratifies and confirms the
terms of the Purchase Agreements as hereby amended.

         6. Effectiveness.  The effectiveness of the agreements set forth
herein shall be subject to and conditioned upon (i) the closing of the
transactions contemplated by the Crescent Agreement (the "Transaction"),
pursuant to which Crescent will make an investment in the Company of not less
than $2,000,000, (ii) the Company's securing from the National Association of
Security Dealers, Inc. confirmation of its acceptance of the Company's proposal
for remaining listed on the Nasdaq Small Cap Market and (iii) the Company's
entering into letter agreements with Millennium and the holders of the Company's
outstanding 14% Senior Convertible Debentures, due April 15, 2002, pertaining to
(A) the restructuring of certain debt obligations to such parties as equity
obligations for purpose of removing such items from the liability side of the
Company's consolidated balance sheets and (B) the waiver of certain antidilution
rights of such parties in connection with the Transaction. If each of the
foregoing conditions has not been satisfied on or prior to 5:00 p.m. New York
time on November 1, 2000, this Agreement shall be void and of no further force
or effect.

         7. Entire Agreement  This Agreement constitutes the entire agreement
and supersedes all prior agreements and undertakings, both written and oral,
between the parties with respect to the subject matter hereof.

         8. Governing Law.  This Agreement shall be governed by, construed and
enforced in accordance with the laws of the State of New York, without
reference to the choice of law provisions thereof.

         9. Counterparts.  This Agreement may be executed in one or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

         If you agree to the foregoing, please so indicate by signing the
enclosed counterpart of this Agreement and returning it to the undersigned,
whereupon this Agreement shall become a binding contract between the parties
hereto.

                                             Very truly yours,

                                       3
<PAGE>   4
                                        CHROMATICS COLOR SCIENCES
                                         INTERNATIONAL, INC.

                                        By:
                                           ---------------------------------
                                           Darby S. Macfarlane
                                           Chairperson of the Board

ACCEPTED AND AGREED TO
THIS ___ DAY OF OCTOBER, 2000:

LB I GROUP INC.

By:
   -------------------------
   Name:
   Title:

                                       4

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