NOCOPI TECHNOLOGIES, INC.
                                537 Apple Street
                          W. Consohocken, PA 19428-2903


                                                February __, 1999

Mr. Richard A. Check
Nocopi Technologies, Inc.
537 Apple Street
W. Consohocken, PA  19428-2903


     Re:  Severance of Employment with Nocopi Technologies, Inc. (the "Company")

Dear Mr. Check:

     Reference is made to that certain Employment Agreement, dated October 27,
1997, by and between the Company and yourself (the "Agreement"). Terms used but
not defined herein shall have the meanings as set forth in the Agreement. This
will confirm our understanding and agreement of the terms and conditions of the
termination of your employment as Executive under the Agreement.

     1.   Effective February 24, 1999 (the "Resignation Date") you have resigned
          as Chairman, Chief Executive Officer and President and a director of
          the Company. Until that time you were a full-time employee of the
          Company and devoted such of your business time as was required under
          the Agreement to the Company. Effective on the Resignation Date your
          employment as Executive under the Agreement terminated, and the
          Agreement terminated except for Section 5 thereof "Restrictive
          Covenant," and Section 6 thereof "Secret Processes."

     2.   Effective on the Resignation Date you have agreed to serve as a
          consultant to the Company to perform such services, primarily related
          to business development, as the Board of Directors of the Company or
          the Interim Chairman of the Board, shall determine. For the first
          three months of the Consulting Period you shall be available to the
          Company for a 4 hour period per week.

     3.   You shall be compensated for consulting services hereunder at the rate
          of $150,000 per year (the applicable salary under the Agreement)
          payable in the same manner specified in the Agreement. The consulting
          period shall extend from February 24, 1999 through December 31, 1999
          (the "Consulting Period") unless earlier terminated by agreement of
          the parties. During the Consulting Period, the Company shall continue
          to provide you with health insurance at its expense and shall continue
          to make the $900 per month car allowance payment as provided to you
          under the Agreement. You have returned all Company credit cards to
          Rudolph Lutterschmidt, Chief Financial Officer of the Company, and you
          agree that you are not authorized in incur expenses on behalf of the

<PAGE>

          Company without the prior authorization of the Board of Directors or
          the Interim Chairman. 


     4.   For good and value consideration, receipt of which is acknowledged,
          you and the Company each hereby release, remise, and forever discharge
          the other from any and all claims and causes of action that each had,
          have or may make, now and forevermore, against the Company, its
          successors and assigns, and their respective affiliates, shareholders,
          employees, officers, directors, agents or representatives, including,
          but not limited to, all claims under the Agreement or for vacation,
          severance or breach of express or implied contract or wrongful
          termination or discharge. You further agree not to make any
          disparaging remarks, whether or not true, or otherwise disparage the
          name or reputation of the Company. The only exceptions to the
          foregoing releases shall be claims based on fraud or criminal conduct
          and claims under this Agreement. 

     5.   The Company shall also indemnify you for your services to it in all
          capacities to the full extent permitted by law and you shall be
          covered under the Company's Insurance Policy for your service as a
          director or officer in accordance with the terms of the policy as in
          effect from time to time and for so long as the Company maintains such
          coverage.

     The rights, benefits, duties and obligations under this agreement shall
inure to, and be binding upon, the Company, its successors and assigns.
Notwithstanding anything to the contrary in the Agreement, this agreement and
the Agreement shall be governed by, and construed and enforced in accordance
with the laws of the State of Pennsylvania and shall be enforceable in the
courts of the State and the Federal Courts located in that State. The Agreement
and this agreement constitute our entire agreement with respect to your
employment and termination of employment with the Company. Any terms of this
agreement inconsistent with those of the Agreement shall supersede and replace
those set forth in the Agreement.

     Please indicate your agreement to the foregoing by signing the enclosed
copy of this letter and returning it to the undersigned.

                                             Very truly yours,

AGREED TO AND ACCEPTED:                      Nocopi Technologies, Inc.


                                             By                       
----------------------                          -------------------------
Richard A. Check                                Jack H. Halperin
                                                Interim Chairman
                                                Of the Board

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