<PAGE>   1


                     [THE CHASE MANHATTAN BANK LETTERHEAD]





                                                      November 11, 1996


Mr. William E. Dye, President
Linographics Corporation
Linographics (Delaware) Corporation
20 West 20th Street
New York, New York 10011

Dear Bill:

The Chase Manhattan Bank (the "Bank") is pleased to make available to
Linographics Corporation and Linographics (Delaware) Corporation, credit
facilities in the aggregate amount of $1,150,000. The Lines of Credit to be
extended at the Bank's sole discretion of up to $1,150,000 for working capital,
are subject but not limited to, the following terms and conditions:

                           LINOGRAPHICS CORPORATION:

LINE OF CREDIT

FACILITY:
Up to a maximum of $700,000 will be available for working capital purposes.

INTEREST RATE:
Borrowings will be priced at the Bank's Prime Rate,  plus one-half (1/2%)
percent.

BORROWING BASE:
All drawdowns will be subject to a maximum borrowing base not to exceed 80% of
eligible accounts receivable aged ninety (90) days and less. Linographics will
provide a monthly borrowing base certificate to the Bank within fifteen (15)
days after the end of each month so long as there are loans outstanding under
the Line of Credit.

Any credit which the Bank may extend will be on terms and conditions as we may
require at the time Linographics requests an advance and must be evidenced by
documents in form and substance satisfactory to the Bank.





<PAGE>   2
                                     - 2 -


FACILITY FEE:
A facility fee of one half (1/2%) percent ($3,500) payable upon signing of this
Commitment Letter.  Thereafter, one half (1/2%) percent of the entire Line of
Credit will be collected on an annual basis on the anniversary date of the Line
of Credit.

The Bank will continue to offer the Credit Facility as outlined herein in its
sole discretion subject to Linographics economic and financial condition
remaining acceptable to the Bank and Linographics maintenance of a satisfactory
relationship with the Bank.  In any event, this  Credit Facility is available
until January 31, 1998.

                      LINOGRAPHICS (DELAWARE) CORPORATION:

LINE OF CREDIT

FACILITY:
Up to a maximum of $450,000 will be available for working capital purposes.

INTEREST RATE:
Borrowings will be priced at the Bank's Prime Rate, plus one-half (1/2%)
percent.

BORROWING BASE:
All drawdowns will be subject to a maximum borrowing base not to exceed 80% of
eligible accounts receivable aged ninety (90) days and less. The borrowing base
will be the aggregate of the Accounts Receivable of Linographics Corporation
and Linographics (Delaware) Corporation. Linographics (Delaware) Corporation
will provide a monthly borrowing base certificate to the Bank within fifteen
(15) days after the end of each month so long as there are loans outstanding
under the Line of Credit.

Any credit which the Bank may extend will be on terms and conditions as we may
require at the time Linographics requests an advance and must be evidenced by
documents in form and substance satisfactory to the Bank.



FACILITY FEE:
A facility fee of one half (1/2%) percent ($2,250) payable upon signing of this
Commitment Letter.  Thereafter, one half (1/2%) percent of the entire Line of
Credit will be collected on an annual basis on the anniversary date of the Line
of Credit.





<PAGE>   3

                                     - 3 -


The Bank will continue to offer the Credit Facility as outlined herein in its
sole discretion subject to Linographics (Delaware) Corporation's economic and
financial condition remaining acceptable to the Bank and the company's
maintenance of a satisfactory relationship with the Bank.  In any event, this
Credit Facility is available until January 31, 1998.

GENERAL CONDITIONS OF THE CREDIT FACILITY:
All extensions of credit which the Bank may grant will be evidenced by
documents in form and substance satisfactory to the Bank.  The Bank will
require the Companies to furnish the following support, which must remain in
place as long as the Credit Facilities as outlined herein are outstanding:

COLLATERAL/ CONDITIONS:
1. Priority  UCC-1 Filing + GSA on all assets of Linographics Corp. and
Linographics (Delaware) Corporation.
2. Monthly borrowing base certificate(s) when line is outstanding for
Linographics Corporation or Linographics (Delaware) Corporation , with advances
up to 80% of eligible A/R's 90 days and less. The certificate will be provided
to the bank within 15 days of the end of the prior month.
3. Monthly account receivable agings for both entities provided within 15 days
of the end of the prior month.
4. The credit facility of Linographics (Delaware) Corporation will be supported
by the guaranty of Linographics Corporation.
5. Unidigital Inc.'s Corporate Guaranty remains in place for both facilities.

REPORTING:
1. Within 120 days after the close of each Fiscal Year, audited consolidated
statements for Unidigital Inc., prepared by an accounting firm acceptable to
the bank along with consolidating statements for each subsidiary.
2. Within 90 days after the date of the each semi-annual date, consolidated
statements for Unidigital Inc., prepared by an accounting firm acceptable to
the bank along with consolidating statements for each subsidiary.
3. Quarterly statements internally prepared by management for Unidigital Inc,
and its subsidiaries.

This letter is for your information only and is not to be shown to or relied
upon by third parties.  This letter constitutes the entire understanding
between the Bank and the Company and supersedes all prior discussions.





<PAGE>   4


                                     - 4 -



The Credit Facility described herein will not be made available to the
Companies until they acknowledge its understanding and agreement to the above
terms and conditions.  If this letter correctly sets forth your understanding
of the terms and conditions regarding the Credit Facility, please indicate your
acceptance by signing in the space indicated and returning the original to the
Bank no later than November 30, 1996.  If not accepted by you, the offer
contained herein shall at the Bank's option expire.

We appreciate this opportunity to work with you and look forward to the
continued development of our mutually beneficial relationship.

Very truly yours,

THE CHASE MANHATTAN BANK


BY: /s/ DONALD FURRER 
   -------------------------               
        Donald Furrer
        Vice President


AGREED AND ACCEPTED

ON THIS DAY 21 DAY OF NOVEMBER 1996
            --        --------

LINOGRAPHICS CORPORATION

BY:    /s/ WILLIAM E. DYE              
   -------------------------

Title:  President                       
      ----------------------

LINOGRAPHICS (DELAWARE) CORPORATION

BY:  /s/ WILLIAM E. DYE                  
   -------------------------

Title:  President                      
      ----------------------




<PAGE>   5
                                CHASE LETTERHEAD


                            GRID TIME PROMISSORY NOTE
                                                
                                                           New York,  New York

                                                            November  21, 1996

               For value received, the undersigned unconditionally (and if more
     than one, jointly and severally) promises to pay to the order of THE CHASE
     MANHATTAN BANK ("Chase"), at its office located at 270 Park Avenue, New
     York, New York, or to such other address as Chase may notify the
     undersigned, the sum of Seven hundred thousand DOLLARS ($700,000.00) or
     such unpaid principal amount of each loan made to the undersigned by Chase
     and outstanding under this Note, on the maturity date(s) as shown on the
     attached schedule or any continuation of the schedule.

              This Note includes any Schedule or Rider attached hereto.

              MATURITY DATE(S). Each loan shall mature on the last day of the
     Interest Period therefor, as noted on the Interest Period column on the
     attached schedule. As to a Variable Rate loan, if no Interest Period is
     noted, then such loan is payable ON DEMAND.

              INTEREST. The undersigned promise(s) to pay interest on the unpaid
     balance of the principal amount of each such loan from and including the
     date of each such loan to but excluding the date such loan shall be paid in
     full at the following applicable rates (check Other Rate box if
     applicable):

              Variable Rate:   A rate of interest per year which shall
                               automatically increase or decrease from time to
                               time so that at all times such rate shall remain
                               equal to that rate of interest from time to time
                               announced by Chase at its head office as its
                               prime commercial lending rate (the "Prime Rate")
                               PLUS 1/2%. Changes in the rate of interest
                               hereunder shall be effective as of and for the
                               entire day on which such change in the Prime Rate
                               becomes effective.


              and
                Other Rate: see Rider(s) attached hereto.

              Interest shall be payable, as to a Variable Rate loan, on THE
     FIRST DAY of each month and as to an Other Rate loan, on the last day of
     each Interest Period, or if such Interest Period is more than 90 days, then
     on the 90th day after the date of such loan and on the last day of such
     Interest Period, unless otherwise specified on a Rider attached hereto, in
     respect of the corresponding principal. Interest shall be calculated on the
     basis of a year of 360 days and payable for the actual number of days
     elapsed.

              After the occurrence of an Event of Default set forth below,
     Chase, at its option, by written notice to the undersigned may increase the
     interest rate on this Note by an additional four percent (4%) per year
     effective on the date of such notice.

              PAYMENTS. All payments under this Note shall be made in lawful
     money of the United States of America and in immediately available funds at
     Chase's office specified above. Chase may (but shall not be obligated to)
     debit the amount of any payment (principal or interest) under this Note
     when due to any deposit account of (any of) the undersigned with Chase. If
     the undersigned are more than one, all obligations of each of the
     undersigned under this Note shall be joint and several. This Note may be
     prepaid without premium unless otherwise specified on a Rider attached
     hereto. Chase may apply any money received or collected for payment of this
     Note to the principal of, interest on or any other amount payable under,
     this Note in any order that Chase may elect.
<PAGE>   6
              Whenever any payment to be made hereunder (including principal and
     interest) shall be stated to be due on a day on which Chase's head office
     is not open for business, that payment will be due on the next following
     banking day, and any extension of time shall in each case be included in
     the computation of interest payable on this Note.

              If any payment (principal or interest) shall not be paid when due
     other than a payment of the entire principal balance of the Note due upon
     acceleration after default, the undersigned shall pay a late payment charge
     equal to five percent (5%) of the amount of such delinquent payment,
     provided that the amount of such late payment charge shall be not less than
     $25 nor more than $500.

              AUTHORIZATIONS. The undersigned hereby authorizes Chase to make
     loans and disburse the proceeds thereof to the account listed below and to
     make repayments of such loans by debiting such account upon oral,
     telephonic or telecopied instructions made by any person purporting to be
     an officer or agent of the undersigned who is empowered to make such
     requests and give such instructions. The undersigned may amend these
     instructions, from time to time, effective upon actual receipt of the
     amendment by Chase. Chase shall not be responsible for the authority, or
     lack of authority, of any person giving such telephonic instructions to
     Chase pursuant to these provisions. By executing this Note, the undersigned
     agrees to be bound to repay any loan obtained hereunder as reflected on
     Chase's books and records and made in accordance with these authorizations,
     regardless of the actual receipt of the proceeds thereof.

              RECORDS. The date, amount and maturity date of each loan under
     this Note and each payment of principal, loan(s) to which such principal is
     applied (which shall be at the discretion of Chase) and the outstanding
     principal balance of loans, shall be recorded by Chase on its books and
     prior to any transfer of this Note (or, at the discretion of Chase at any
     other time) endorsed by Chase on the schedule attached or any continuation
     of the schedule. Any such endorsement shall be conclusive absent manifest
     error.

              REPRESENTATIONS AND WARRANTIES. If the undersigned is other than
     an individual, the undersigned represents and warrants upon the execution
     and delivery of this Note and upon each loan request hereunder, that: (a)
     it is duly organized and validly existing under the laws of the
     jurisdiction of its organization or incorporation and, if relevant under
     such laws, in good standing; (b) it has the power to execute and deliver
     this Note and to perform its obligations hereunder and has taken all
     necessary action to authorize such execution, delivery and performance; (c)
     such execution, delivery and performance do not violate or conflict with
     any law applicable to it, any provision of its organizational documents,
     any order or judgment of any court or other agency of government applicable
     to it or any of its assets or any material contractual restriction binding
     on or materially affecting it or any of its assets; (d) to the best of
     undersigned's knowledge, all governmental and other consents that are
     required to have been obtained by it with respect to this Note have been
     obtained and are in full force and effect and all conditions of any such
     consents have been complied with; (e) its obligations under this Note
     constitute its legal, valid and binding obligations, enforceable in
     accordance with its terms except to the extent that such enforcement may be
     limited by applicable bankruptcy, insolvency or other similar laws
     affecting creditors' rights generally; (f) all financial statements and
     related information furnished and to be furnished to Chase from time to
     time by the undersigned are true and complete and fairly present the
     financial or other information stated therein as at such dates or for the
     periods covered thereby; (g) there are no actions, suits, proceedings or
     investigations pending or, to the knowledge of the undersigned, threatened
     against or affecting the undersigned before any court, governmental agency
     or arbitrator, which involve forfeiture of any assets of the undersigned or
     which may materially adversely affect the financial condition, operations,
     properties or business of the undersigned or the ability of the undersigned
     to perform its obligation under this Note; and (h) there has been no
     material adverse change in the financial condition of the undersigned since
     the last such financial statements or information. If the undersigned is an
     individual, the undersigned represents and warrants at the times set forth
     at the beginning of this section, the correctness of clauses (c), (d), (e),
     (f), (g) and (h) above to the extent applicable to an individual.

              NO COMMITMENT. This Note does not create and shall not be deemed
     or construed to create any contractual commitment to lend by Chase. Any
     such commitment in respect of this Note can only be made by and shall only
     be effective to the extent set forth in a separate writing expressly
     designated for that purpose and subscribed by a duly authorized officer of
     Chase.
<PAGE>   7
     SECURITY. As collateral security for the payment of this Note and of any
     and all other obligations and liabilities of the undersigned to Chase, now
     existing or hereafter arising, the undersigned grants to Chase a security
     interest in and a lien upon and right of offset against all moneys, deposit
     balances, securities or other property or interest therein of the
     undersigned now or at any time hereafter held or received by or for or left
     in the possession or control of Chase or any of its affiliates, including
     subsidiaries, whether for safekeeping, custody, transmission, collection,
     pledge or for any other or different purpose.

              DEFAULT. IF ANY OF THE FOLLOWING EVENTS OF DEFAULT SHALL OCCUR
     with respect to any of the undersigned (each an "Event of Default"):
                  (a) the undersigned shall fail to pay the principal of, or
              interest on, this Note, or any other amount payable under this
              Note, as and when due and payable;
                  (b) any representation or warranty made or deemed made by the
              undersigned in this Note or in any document granting security or
              support for (or otherwise executed in connection with) this Note
              or by any third party supporting or liable with respect to this
              Note (whether by guaranty, subordination, grant of security or any
              other credit support, a "Third Party") in any document evidencing
              the obligations of a Third Party (this Note and all of the
              foregoing documents and all agreements, instruments or other
              documents executed by the undersigned or a Third Party being the
              "Facility Documents") or which is contained in any certificate,
              document, opinion, financial or other statement furnished at any
              time under or in connection with any Facility Document, shall
              prove to have been incorrect in any material respect on or as of
              the date made or deemed made;
                  (c) the undersigned or any Third Party shall fail to perform
              or observe any term, covenant or agreement contained in any
              Facility Document on its part to be performed or observed, and
              such failure shall continue for 30 consecutive days;
                  (d) the undersigned or any Third Party shall fail to pay when
              due any indebtedness (including but not limited to indebtedness
              for borrowed money) or if any such indebtedness shall become due
              and payable, or shall be capable of becoming due and payable at
              the option of any holder thereof, by acceleration of its maturity,
              or if there shall be any default by the undersigned or any Third
              Party under any agreement relating to such indebtedness;
                  (e) the undersigned or any Third Party: (i) shall generally
              not, or be unable to, or shall admit in writing its inability to,
              pay its debts as such debts become due; (ii) shall make an
              assignment for the benefit of creditors; (iii) shall file a
              petition in bankruptcy or for any relief under any law of any
              jurisdiction relating to reorganization, arrangement, readjustment
              of debt, dissolution or liquidation; (iv) shall have any such
              petition filed against it and the same shall remain undismissed
              for a period of 30 days or shall consent or acquiesce thereto; or
              (v) shall have had a receiver, custodian or trustee appointed for
              all or a substantial part of its property;
                  (f) if the undersigned or any Third Party is an individual,
              such individual shall die or be declared incompetent;
                  (g) any Third Party Facility Document shall at any time and
              for any reason cease to be in full force and effect or shall be
              declared null and void, or its validity or enforceability shall be
              contested by the relevant Third Party or such Third Party shall
              deny it has any further liability or obligation under any Facility
              Document or shall fail to perform its obligations under any
              Facility Document;
                  (h) any security agreement or other agreement (whether by the
              undersigned or any Third Party) granting a security interest,
              lien, mortgage or other encumbrance securing obligations under any
              Facility Document shall at any time and for any reason cease to
              create a valid and perfected first priority security interest,
              lien, mortgage or other encumbrance in or on the property
              purported to be subject to such agreement or shall cease to be in
              full force and effect or shall be declared null and void, or the
              validity or enforceability of any such agreement shall be
              contested by any party to such agreement, or such party shall deny
              it has any further liability or obligation under such agreement or
              any such party shall fail to perform any of its obligations under
              such agreement;
                  (i) the undersigned shall make or permit to be made any
              material change in the character, management or direction of the
              undersigned's business or operations (including, but not limited
              to, a change in its executive management or in the ownership of
              its capital stock which effects a change in the control of any
              such business or operations), which is not satisfactory to Chase;
                  (j) the undersigned or any Third Party shall suffer a material
              adverse change in its business, financial condition, properties or
              prospects;
                  (k) any action, suit, proceeding or investigation against or
              affecting the undersigned or a Third Party before any court or
              governmental agency which involves forfeiture of any assets of the
              undersigned or a Third Party shall have been commenced; or
<PAGE>   8
                  (l) one or more judgments, decrees or orders for the payment
              of money in excess of $50,000 in the aggregate shall be rendered
              against the undersigned and shall continue unsatisfied and in
              effect for a period of 30 consecutive days without being vacated,
              discharged, satisfied or stayed or bonded pending appeal.

     THEN, IN ANY SUCH CASE, if Chase shall elect by notice to the undersigned,
     the unpaid principal amount of this Note, together with accrued interest,
     shall become forthwith due and payable; provided that in the case of an
     event of default under (e) above, the unpaid principal amount of this Note,
     together with accrued interest, shall immediately become due and payable
     without any notice or other action by Chase.

              THE EVENTS OF DEFAULT AND REMEDIES SET FORTH ABOVE ARE IN ADDITION
     TO AND WITHOUT IN ANY WAY DIMINISHING ANY RIGHT BY CHASE TO MAKE DEMAND FOR
     PAYMENT AT ANY TIME.

              CERTAIN WAIVERS. The undersigned waive(s) presentment, notice of
     dishonor, protest and any other notice or formality with respect to this
     Note.

              COSTS. The undersigned agree(s) to reimburse Chase on demand for
     all costs, expenses and charges (including, without limitation, fees and
     charges of external legal counsel for Chase and costs allocated by its
     internal legal department) in connection with the preparation,
     interpretation, performance or enforcement of this Note and the Facility
     Documents.

              NOTICES. All notices, requests, demands or other communications to
     or upon the undersigned or Chase shall be in writing and shall be deemed to
     be delivered upon receipt if delivered by hand or overnight courier or five
     days after mailing to the address (a) of the undersigned as set forth next
     to the undersigned's execution of this Note, (b) of Chase as first set
     forth above, or (c) of the undersigned or Chase at such other address as
     the undersigned or Chase shall specify to the other in writing.

              ASSIGNMENT. This Note shall be binding upon the undersigned and
     its or their successors and shall inure to the benefit of Chase and its
     successors and assigns.

              AMENDMENT AND WAIVER. This Note may be amended only by a writing
     signed on behalf of each party and shall be effective only to the extent
     set forth in that writing. No delay by Chase in exercising any power or
     right hereunder shall operate as a waiver thereof or of any other power or
     right; nor shall any single or partial exercise of any power or right
     preclude other or future exercise thereof, or the exercise of any other
     power or right hereunder.

              GOVERNING LAW; JURISDICTION. This Note shall be governed by and
     construed in accordance with the laws of the State of New York, Connecticut
     or New Jersey, depending on the location of the Chase office set forth in
     this Note. The undersigned consent(s) to the nonexclusive jurisdiction and
     venue of the state or federal courts located in such state. In the event of
     a dispute hereunder, suit may be brought against the undersigned is such
     courts or in any jurisdiction where the undersigned or any of its assets
     may be located. Service of process by Chase in connection with any dispute
     shall be binding on the undersigned if sent to the undersigned by
     registered mail at the address(es) specified below or to such further
     address(es) as the undersigned may specify to Chase in writing.

              MAXIMUM INTEREST. Notwithstanding any other provision of this
     Note, the undersigned shall not be required to pay any amount pursuant to
     this Note which is in excess of the maximum amount permitted to be charged
     by national banks under applicable law and any such excess interest paid
     shall be refunded to the undersigned or applied to principal owing
     hereunder.

              COMMERCIAL TRANSACTION. IF THE UNDERSIGNED IS A CONNECTICUT
     DOMICILED ENTITY OR RESIDENT, EACH OF THE UNDERSIGNED HEREBY ACKNOWLEDGES
     THAT THIS NOTE AND THE TRANSACTIONS CONTEMPLATED HEREBY CONSTITUTE
     COMMERCIAL TRANSACTIONS WITHIN THE MEANING OF SECTION 52L-278a OF THE
     CONNECTICUT GENERAL STATUTES. EACH OF THE UNDERSIGNED EXPRESSLY WAIVES ANY
     AND ALL RIGHTS, CONSTITUTIONAL OR OTHERWISE, WITH RESPECT TO NOTICE AND
     HEARING AND ANY RIGHTS UNDER CHAPTER 903a OF THE CONNECTICUT GENERAL
     STATUTES IN CONNECTION WITH ANY PREJUDGMENT REMEDY AVAILABLE TO CHASE.
<PAGE>   9
         BORROWER WAIVERS. THE UNDERSIGNED HEREBY KNOWINGLY, VOLUNTARILY AND
INTENTIONALLY WAIVE(S) (TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW) ANY
RIGHT TO A TRIAL BY JURY OF ANY DISPUTE ARISING UNDER OR RELATING TO THIS NOTE
OR ANY FACILITY DOCUMENT, AND AGREES THAT ANY SUCH DISPUTE SHALL, AT CHASE'S
OPTION, BE TRIED BEFORE A JUDGE SITTING WITHOUT A JURY.

         IN ADDITION, THE UNDERSIGNED WAIVES THE RIGHT TO INTERPOSE ANY DEFENSE
BASED UPON ANY STATUTE OF LIMITATIONS OR ANY CLAIM OF DELAY BY CHASE AND ANY
SET-OFF OR COUNTERCLAIM OF ANY NATURE OR DESCRIPTION.


                                Chase Account No. to be charged for 
                                Disbursements and Payments:
                               
                                --------------------------------------------


Address for notices:            Linographics Corporation
                                --------------------------------------------

20 West 20th Street             By: /s/ William Dye
------------------------            ----------------------------------------
New York, New York 10011        Print Name: William Dye
------------------------                    --------------------------------
                                Title: President
------------------------               -------------------------------------
                                By:
------------------------            ----------------------------------------

Telecopier No.  (   )    -      Print Name:                        
                 --- ----  ----             --------------------------------
                                Title:                                   
                                       -------------------------------------


<PAGE>   10
                                SCHEDULE TO GRID
                               PROMISSORY NOTE OF
              _______________________ DATED _______________, 199_.




<TABLE>
<CAPTION>
                                                                                                AGGREGATE
                                                                                                PRINCIPAL
   DATE                                                                                          BALANCE           NOTATION
    OF                 INTEREST          AMOUNT OF          INTEREST          AMOUNT OF         REMAINING            MADE
   LOAN                 PERIOD              LOAN              RATE             PAYMENT            UNPAID              BY
<S>                    <C>               <C>                <C>               <C>               <C>                <C>

</TABLE>