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                                                                  EXHIBIT 3.1(B)



                                     FORM OF
                   CERTIFICATE OF DESIGNATION, PREFERENCES AND
                       RIGHTS OF SERIES A PREFERRED STOCK

                                       of

                        SYBRON INTERNATIONAL CORPORATION


     Pursuant to Section 180.0602 of the Wisconsin Business Corporation Law


                  We, Kenneth F. Yontz, Chairman of the Board, President and
Chief Executive Officer, and R. Jeffrey Harris, Vice President-General Counsel
and Secretary, the undersigned officers of Sybron International Corporation, a
corporation organized and existing under the Wisconsin Business Corporation Law,
in accordance with the provisions of Section 180.0602 thereof, DO HEREBY
CERTIFY:

                  That pursuant to the authority conferred upon the Board of
Directors by the Restated Articles of Incorporation of the said Corporation, the
said Board of Directors as of December 11, 2000, adopted the following
resolution creating a series of 2,500,000 shares of Preferred Stock, par value
$0.01 per share, designated as Series A Preferred Stock (of which none of the
shares of such series has been issued):

                  RESOLVED, that pursuant to the authority vested in the Board
of Directors of this Corporation in accordance with the provisions of its
Restated Articles of Incorporation, a series of Preferred Stock of the
Corporation be and it hereby is created, and that the designation and amount
thereof and the voting powers, preferences and relative, participating, optional
and other special rights of the shares of such series, and the qualifications,
limitations or restrictions thereof are as follows:

                  Section 1. Designation and Amount. The shares of such series
shall be designated as "Series A Preferred Stock" and the number of shares
constituting such series shall be 2,500,000.


                  Section 2. Dividends and Distributions.

                  (A) The holders of shares of Series A Preferred Stock shall be
entitled to receive, when, as and if declared by the Board of Directors out of
funds legally available for the purpose, quarterly dividends payable in cash on
the last business day of March, June, September and December in each year (each
such date being referred to herein as a "Quarterly Dividend Payment Date"),
commencing on the first Quarterly Dividend Payment Date after the first issuance
of a share or fraction of a share of Series A Preferred Stock, in an amount per
share (rounded to the nearest



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cent) equal to the greater of (a) $1.00 or (b) subject to the provision for
adjustment hereinafter set forth, 100 times the aggregate per share amount of
all cash dividends, and 100 times the aggregate per share amount (payable in
kind) of all non-cash dividends or other distributions other than a dividend
payable in shares of Common Stock or a subdivision of the outstanding shares of
Common Stock (by reclassification or otherwise), declared on the Common Stock,
par value $.01 per share, of the Corporation (the "Common Stock") since the
immediately preceding Quarterly Dividend Payment Date, or, with respect to the
first Quarterly Dividend Payment Date, since the first issuance of any share or
fraction of a share of Series A Preferred Stock. In the event the Corporation
shall at any time after December 11, 2000 (the "Rights Dividend Declaration
Date") (i) declare any dividend on Common Stock payable in shares of Common
Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the
outstanding Common Stock into a smaller number of shares, then in each such case
the amount to which holders of shares of Series A Preferred Stock were entitled
immediately prior to such event under clause (b) of the preceding sentence shall
be adjusted by multiplying such amount by a fraction the numerator of which is
the number of shares of Common Stock outstanding immediately after such event
and the denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

                  (B) The Corporation shall declare a dividend or distribution
on the Series A Preferred Stock as provided in Paragraph (A) above immediately
after it declares a dividend or distribution on the Common Stock (other than a
dividend payable in shares of Common Stock); provided that, in the event no
dividend or distribution shall have been declared on the Common Stock during the
period between any Quarterly Dividend Payment Date and the next subsequent
Quarterly Dividend Payment Date, a dividend of $1.00 per share on the Series A
Preferred Stock shall nevertheless be payable on such subsequent Quarterly
Dividend Payment Date.

                  (C) Dividends shall begin to accrue and be cumulative on
outstanding shares of Series A Preferred Stock from the Quarterly Dividend
Payment Date next preceding the date of issue of such shares of Series A
Preferred Stock, unless the date of issue of such shares is prior to the record
date for the first Quarterly Dividend Payment Date, in which case dividends on
such shares shall begin to accrue from the date of issue of such shares, or
unless the date of issue is a Quarterly Dividend Payment Date or is a date after
the record date for the determination of holders of shares of Series A Preferred
Stock entitled to receive a quarterly dividend and before such Quarterly
Dividend Payment Date, in either of which events such dividends shall begin to
accrue and be cumulative from such Quarterly Dividend Payment Date. Accrued but
unpaid dividends shall not bear interest. Dividends paid on the shares of Series
A Preferred Stock in an amount less than the total amount of such dividends at
the time accrued and payable on such shares shall be allocated pro rata on a
share-by-share basis among all such shares at the time outstanding. The Board of
Directors may fix a record date for the determination of holders of shares of
Series A Preferred Stock entitled to receive payment of a dividend or
distribution declared thereon, which record date shall be no more than 30 days
prior to the date fixed for the payment thereof.

                   Section 3. Voting Rights. The holders of shares of Series A
Preferred Stock shall have the following voting rights:





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                  (A) Subject to the provision for adjustment hereinafter set
forth, each share of Series A Preferred Stock shall entitle the holder thereof
to 100 votes on all matters submitted to a vote of the stockholders of the
Corporation. In the event the Corporation shall at any time after the Rights
Dividend Declaration Date (i) declare any dividend on Common Stock payable in
shares of Common Stock, (ii) subdivide the outstanding Common Stock, or (iii)
combine the outstanding Common Stock into a smaller number of shares, then in
each such case the number of votes per share to which holders of shares of
Series A Preferred Stock were entitled immediately prior to such event shall be
adjusted by multiplying such number by a fraction the numerator of which is the
number of shares of Common Stock outstanding immediately after such event and
the denominator of which is the number of shares of Common Stock that were
outstanding immediately prior to such event.

                  (B) Except as otherwise provided herein or by law, the holders
of shares of Series A Preferred Stock and the holders of shares of Common Stock
shall vote together as one class on all matters submitted to a vote of
stockholders of the Corporation.

                  (C)  (i) If at any time dividends on any Series A Preferred
         Stock shall be in arrears in an amount equal to six (6) quarterly
         dividends thereon, the occurrence of such contingency shall mark the
         beginning of a period (herein called a "default period") which shall
         extend until such time when all accrued and unpaid dividends for all
         previous quarterly dividend periods and for the current quarterly
         dividend period on all shares of Series A Preferred Stock then
         outstanding shall have been declared and paid or set apart for payment.
         During each default period, all holders of Preferred Stock (including
         holders of the Series A Preferred Stock) with dividends in arrears in
         an amount equal to six (6) quarterly dividends thereon, voting as a
         class, irrespective of series, shall have the right to elect two (2)
         directors.

                       (ii) During any default period, such voting right of the
         holders of Series A Preferred Stock may be exercised initially at a
         special meeting called pursuant to subparagraph (iii) of this Section
         3(C) or at any annual meeting of stockholders, and thereafter at
         annual meetings of stockholders, provided that neither such voting
         right nor the right of the holders of any other series of Preferred
         Stock, if any, to increase, in certain cases, the authorized number of
         directors shall be exercised unless the holders of ten percent (10%)
         in number of shares of Preferred Stock outstanding shall be present in
         person or by proxy. The absence of a quorum of the holders of Common
         Stock shall not affect the exercise by the holders of Preferred Stock
         of such voting right. At any meeting at which the holders of Preferred
         Stock shall exercise such voting right initially during an existing
         default period, they shall have the right, voting as a class, to elect
         directors to fill such vacancies, if any, in the Board of Directors as
         may then exist up to two (2) directors or, if such right is exercised
         at an annual meeting, to elect two (2) directors. If the number which
         may be so elected at any special meeting does not amount to the
         required number, the holders of the Preferred Stock shall have the
         right to make such increase in the number of directors as shall be
         necessary to permit the election by them of the required number. After
         the holders of the Preferred Stock shall have exercised their right to
         elect directors




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         in any default period and during the continuance of such period, the
         number of directors shall not be increased or decreased except by vote
         of the holders of Preferred Stock as herein provided or pursuant to
         the rights of any equity securities ranking senior to or pari passu
         with the Series A Preferred Stock.

                       (iii) Unless the holders of Preferred Stock shall, during
         an existing default period, have previously exercised their right to
         elect directors, the Board of Directors may order, or any stockholder
         or stockholders owning in the aggregate not less than ten percent (10%)
         of the total number of shares of Preferred Stock outstanding,
         irrespective of series, may request, the calling of a special meeting
         of the holders of Preferred Stock, which meeting shall thereupon be
         called by the President, a Vice-President or the Secretary of the
         Corporation. Notice of such meeting and of any annual meeting at which
         holders of Preferred Stock are entitled to vote pursuant to this
         Paragraph (C)(iii) shall be given to each holder of record of Preferred
         Stock by mailing a copy of such notice to him at his last address as
         the same appears on the books of the Corporation. Such meeting shall be
         called for a time not earlier than 20 days and not later than 60 days
         after such order or request or in default of the calling of such
         meeting within 60 days after such order or request, such meeting may be
         called on similar notice by any stockholder or stockholders owning in
         the aggregate not less than ten percent (10%) of the total number of
         shares of Preferred Stock outstanding. Notwithstanding the provisions
         of this Paragraph (C)(iii), no such special meeting shall be called
         during the period within 60 days immediately preceding the date fixed
         for the next annual meeting of the stockholders.

                       (iv) In any default period, the holders of Common Stock,
         and other classes of stock of the Corporation if applicable, shall
         continue to be entitled to elect the whole number of directors until
         the holders of Preferred Stock shall have exercised their right to
         elect two (2) directors voting as a class, after the exercise of which
         right (x) the directors so elected by the holders of Preferred Stock
         shall continue in office until their successors shall have been
         elected by such holders or until the expiration of the default period,
         and (y) any vacancy in the Board of Directors may (except as provided
         in Paragraph (C)(ii) of this Section 3) be filled by vote of a majority
         of the remaining directors theretofore elected by the holders of the
         class of stock which elected the director whose office shall have
         become vacant. References in this Paragraph (C) to directors elected by
         the holders of a particular class of stock shall include directors
         elected by such directors to fill vacancies as provided in clause (y)
         of the foregoing sentence.

                       (v) Immediately upon the expiration of a default period,
         (x) the right of the holders of Preferred Stock as a class to elect
         directors shall cease, (y) the term of any directors elected by the
         holders of Preferred Stock as a class shall terminate, and (z) the
         number of directors shall be such number as may be provided for in the
         articles of incorporation or by-laws irrespective of any increase made
         pursuant to the provisions of Paragraph (C)(ii) of this Section 3 (such
         number being subject, however, to change thereafter in any manner
         provided by law or in the articles of incorporation





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         or by-laws). Any vacancies in the Board of Directors effected by the
         provisions of clauses (y) and (z) in the preceding sentence may be
         filled by a majority of the remaining directors.

                  (D) Except as set forth herein, holders of Series A Preferred
Stock shall have no special voting rights and their consent shall not be
required (except to the extent they are entitled to vote with holders of Common
Stock as set forth herein) for taking any corporate action.


                  Section 4.  Certain Restrictions.

                  (A) Whenever quarterly dividends or other dividends or
distributions payable on the Series A Preferred Stock as provided in Section 2
are in arrears, thereafter and until all accrued and unpaid dividends and
distributions, whether or not declared, on shares of Series A Preferred Stock
outstanding shall have been paid in full, the Corporation shall not

                           (i) declare or pay dividends on, make any other
                  distributions on, or redeem or purchase or otherwise acquire
                  for consideration any shares of stock ranking junior (either
                  as to dividends or upon liquidation, dissolution or winding
                  up) to the Series A Preferred Stock;

                           (ii) declare or pay dividends on or make any other
                  distributions on any shares of stock ranking on a parity
                  (either as to dividends or upon liquidation, dissolution or
                  winding up) with the Series A Preferred Stock, except
                  dividends paid ratably on the Series A Preferred Stock and all
                  such parity stock on which dividends are payable or in arrears
                  in proportion to the total amounts to which the holders of all
                  such shares are then entitled;

                           (iii) redeem or purchase or otherwise acquire for
                  consideration shares of any stock ranking on a parity (either
                  as to dividends or upon liquidation, dissolution or winding
                  up) with the Series A Preferred Stock, provided that the
                  Corporation may at any time redeem, purchase or otherwise
                  acquire shares of any such parity stock in exchange for shares
                  of any stock of the Corporation ranking junior (either as to
                  dividends or upon dissolution, liquidation or winding up) to
                  the Series A Preferred Stock; or

                           (iv) purchase or otherwise acquire for consideration
                  any shares of Series A Preferred Stock, or any shares of stock
                  ranking on a parity with the Series A Preferred Stock, except
                  in accordance with a purchase offer made in writing or by
                  publication (as determined by the Board of Directors) to all
                  holders of such shares upon such terms as the Board of
                  Directors, after consideration of the respective annual
                  dividend rates and other relative rights and preferences of
                  the respective series and classes, shall determine in good
                  faith will result in fair and equitable treatment among the
                  respective series or classes.




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                  (B) The Corporation shall not permit any subsidiary of the
Corporation to purchase or otherwise acquire for consideration any shares of
stock of the Corporation unless the Corporation could, under Paragraph (A) of
this Section 4, purchase or otherwise acquire such shares at such time and in
such manner.

                  Section 5. Reacquired Shares. Any shares of Series A Preferred
Stock purchased or otherwise acquired by the Corporation in any manner
whatsoever shall be retired and cancelled promptly after the acquisition
thereof. All such shares shall upon their cancellation become authorized but
unissued shares of Preferred Stock and may be reissued as part of a new series
of Preferred Stock to be created by resolution or resolutions of the Board of
Directors, subject to the conditions and restrictions on issuance set forth
herein.

                  Section 6. Liquidation, Dissolution or Winding Up. (A) Upon
any liquidation (voluntary or otherwise), dissolution or winding up of the
Corporation, no distribution shall be made to the holders of shares of stock
ranking junior (either as to dividends or upon liquidation, dissolution or
winding up) to the Series A Preferred Stock unless, prior thereto, the holders
of shares of Series A Preferred Stock shall have received an amount equal to
$100 per share of Series A Stock, plus an amount equal to accrued and unpaid
dividends and distributions thereon, whether or not declared, to the date of
such payment (the "Series A Liquidation Preference"). Following the payment of
the full amount of the Series A Liquidation Preference, no additional
distributions shall be made to the holders of shares of Series A Preferred Stock
unless, prior thereto, the holders of shares of Common Stock shall have received
an amount per share (the "Common Adjustment") equal to the quotient obtained by
dividing (i) the Series A Liquidation Preference by (ii) 100 (as appropriately
adjusted as set forth in subparagraph (C) below to reflect such events as stock
splits, stock dividends and recapitalizations with respect to the Common Stock)
(such number in clause (ii), the "Adjustment Number"). Following the payment of
the full amount of the Series A Liquidation Preference and the Common Adjustment
in respect of all outstanding shares of Series A Preferred Stock and Common
Stock, respectively, holders of Series A Preferred Stock and holders of shares
of Common Stock shall receive their ratable and proportionate share of the
remaining assets to be distributed in the ratio of the Adjustment Number to 1
with respect to such Preferred Stock and Common Stock, on a per share basis,
respectively.

                  (B) In the event, however, that there are not sufficient
assets available to permit payment in full of the Series A Liquidation
Preference and the liquidation preferences of all other series of preferred
stock, if any, which rank on a parity with the Series A Preferred Stock, then
such remaining assets shall be distributed ratably to the holders of such parity
shares in proportion to their respective liquidation preferences. In the event,
however, that there are not sufficient assets available to permit payment in
full of the Common Adjustment, then such remaining assets shall be distributed
ratably to the holders of Common Stock.

                  (C) In the event the Corporation shall at any time after the
Rights Dividend Declaration Date (i) declare any dividend on Common Stock
payable in shares of Common Stock, (ii) subdivide the outstanding Common Stock,
or (iii) combine the outstanding Common Stock into a smaller number of shares,
then in each such case the Adjustment Number in effect immediately prior to such
event shall be adjusted by multiplying such Adjustment Number by a fraction the




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numerator of which is the number of shares of Common Stock outstanding
immediately after such event and the denominator of which is the number of
shares of Common Stock that were outstanding immediately prior to such event.

                  Section 7. Consolidation, Merger, etc. In case the Corporation
shall enter into any consolidation, merger, combination or other transaction in
which the shares of Common Stock are exchanged for or changed into other stock
or securities, cash and/or any other property, then in any such case the shares
of Series A Preferred Stock shall at the same time be similarly exchanged or
changed in an amount per share (subject to the provision for adjustment
hereinafter set forth) equal to 100 times the aggregate amount of stock,
securities, cash and/or any other property (payable in kind), as the case may
be, into which or for which each share of Common Stock is changed or exchanged.
In the event the Corporation shall at any time after the Rights Dividend
Declaration Date (i) declare any dividend on Common Stock payable in shares of
Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the
outstanding Common Stock into a smaller number of shares, then in each such case
the amount set forth in the preceding sentence with respect to the exchange or
change of shares of Series A Preferred Stock shall be adjusted by multiplying
such amount by a fraction the numerator of which is the number of shares of
Common Stock outstanding immediately after such event and the denominator of
which is the number of shares of Common Stock that were outstanding immediately
prior to such event.

                  Section 8. Ranking. The Series A Preferred Stock shall rank
junior to all other series of the Corporation's Preferred Stock as to the
payment of dividends and the distribution of assets, unless the terms of any
such series shall provide otherwise.

                  Section 9. No Redemption. The shares of Series A Preferred
Stock shall not be redeemable.

                  Section 10. Amendment. At any time when any shares of Series A
Preferred Stock are outstanding, neither the Restated Articles of Incorporation
of the Corporation nor this Certificate of Designation shall be amended in any
manner which would materially alter or change the powers, preferences or special
rights of the Series A Preferred Stock so as to affect them adversely without
the affirmative vote of the holders of a majority or more of the outstanding
shares of Series A Preferred Stock, voting separately as a class.

                  Section 11. Fractional Shares. Series A Preferred Stock may be
issued in fractions of a share which shall entitle the holder, in proportion to
such holder's fractional shares, to exercise voting rights, receive dividends,
participate in distributions and to have the benefit of all other rights of
holders of Series A Preferred Stock.




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                  IN WITNESS WHEREOF, we have executed and subscribed this
Certificate and do affirm the foregoing as true under the penalties of perjury
this 11th day of December, 2000.


                                              /s/ KENNETH F. YONTZ
                                            ------------------------------------
                                            Kenneth F. Yontz
                                            Chairman of the Board, President
                                            and Chief Executive Officer


Attest:


  /s/ R. JEFFREY HARRIS
------------------------------
R. Jeffrey Harris
Vice President-General Counsel
and Secretary






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