PLEDGE AGREEMENT

     THIS PLEDGE  AGREEMENT  (this  "Agreement") is made as of July 26, 1996 and
effective as of July 31, 1996, between ENVIROMETRICS a Delaware corporation (the
"Creditor"), and Andrew C. Gillette, a South Carolina resident ("Gillette").

                                    RECITALS:

     A. Trico  Envirometrics,  Inc., a South Carolina corporation (the "Debtor")
is currently indebted to the Creditor in an approximate  aggregate amount of Six
Hundred  Thousand  Dollars  ($600,000.00  US), which  indebtedness is subject to
increase (as such may change from time to time, the  "Indebtedness")  and is now
evidenced  by a certain  Promissory  Note of even date  herewith in favor of the
Creditor (the "Note").

     B. Concurrent  herewith,  Gillette is purchasing from the Creditor pursuant
to a certain  Stock  Purchase  Agreement  of even date,  all of the  outstanding
shares of common  stock of the Debtor for a purchase  price of 45,000  shares of
Envirometrics, Inc. common stock. The Creditor has agreed to sell such stock for
such price to Gillette subject to, among other conditions,  Gillette's executing
and delivering this Agreement to the Creditor.

     C. To induce the Creditor to sell to Gillette all of the outstanding shares
of common stock of the Debtor for such purchase price, Gillette wishes to pledge
to the Creditor all of his interest in Trico Envirometrics, Inc.. and to options
to the  purchase of shares of common stock of the Creditor to secure (i) payment
of the  Indebtedness,  and (ii) performance of all of the respective  covenants,
obligations  and agreements of each of the Debtor and Gillette,  as set forth in
the documents  evidencing,  securing the  repayment  of,  executed in connection
with,  or otherwise  related to the  Indebtedness  or sale of stock to Gillette,
including without limitation,  the Stock Purchase  Agreement,  the Unconditional
Guarantee Agreement, the Promissory Note, this Agreement, the Security Agreement
and the  Accounting  Services  Agreement,  all of even  date  (collectively,  as
hereafter  amended,  modified,  extended  or  renewed  from  time to  time,  the
"Transaction  Documents") all according to the terms and conditions  hereinafter
set forth.

                                   AGREEMENT:

     NOW,  THEREFORE,  in consideration of the  representations,  warranties and
covenants  herein set  forth,  and other good and  valuable  consideration,  the
receipt and sufficiency of which are hereby  acknowledged,  and as an inducement
to the  Creditor to sell all of the issued and  outstanding  common stock of the
Debtor to Gillette, the parties hereby covenant and agree as follows:

     1.  Method  and Terms of Pledge.  To secure  (i) the  payment of all of the
Indebtedness,   and  (ii)  performance  of  all  of  the  respective  covenants,
obligations  and agreements of each of the Debtor and Gillette,  as set forth in
the Transaction Documents, or


     any of them  (collectively,  the  "Obligations"),  Gillette hereby pledges,
assigns  and  grants  a  security  interest  in  all of his  interest  in  Trico
Envirometrics  Inc.  stock and to options to purchase  shares of common stock of
the Creditor (together with any other securities  substituted therefor or issued
in  addition  thereto  as herein  provided,  the  "Pledged  Securities")  to the
Creditor. The term "Obligations" shall include all Obligations,  whether matured
or un-matured, or absolute or contingent, and whether they are from time to time
reduced, increased, or entirely extinguished and thereafter reincurred. The term
"Obligations" shall further include,  without  limitation,  all liability of the
Debtor to the  Creditor,  whether now or  hereafter  incurred;  whether  direct,
indirect,  or  contingent;  whether  incurred  as primary  debtor,  co-maker  or
guarantor; whether otherwise guaranteed or secured; and whether on open account,
evidenced  by an  instrument  or  otherwise.  Immediately  after  execution  and
delivery of this Agreement,  Gillette will deposit or cause to be deposited with
the  Creditor  a  certificate  in  Gillette's  name   representing  the  Pledged
Securities' or common stock  certificates  if pledged  options are exercised or,
with stock  powers duly  endorsed in blank,  and the Creditor  will  acknowledge
receipt thereof.

     2.  Representations  and  Warranties of Gillette.  Gillette  represents and
warrants that he owns the Pledged Securities and that the Pledged Securities are
not subject to any lien,  pledge,  charge,  encumbrance or security  interest or
right or option on the part of any third party to purchase or otherwise  acquire
the Pledged Securities or any part thereof.

     3.  Right  to  Vote  and to  Receive  Dividends  With  Respect  to  Pledged
Securities.  So long as a default in the  payment or  performance  of any of the
Obligations  shall not have occurred and be continuing,  (i) Gillette shall from
time to time be entitled  to receive  and collect for his own use all  dividends
paid in cash out of the earned  surplus or net profits of the Creditor on any of
the Pledged Securities, and (ii) Gillette shall from time to time have the right
to  vote  or to  execute  waivers  or  consents  with  respect  to  the  Pledged
Securities.   However,  all  stock  dividends,   stock  splits  or  other  stock
distributions  on any or all of the Pledged  Securities  shall be pledged to and
deposited with the Creditor as part of the Pledged  Securities  pursuant to this
Agreement.

     4. Reclassification,  Sale, Merger, and Consolidation. The capital stock of
the Creditor of Gillette may be sold or exchanged,  by merger or otherwise,  may
be increased or reduced or reclassified  and additional  shares may be issued to
Gillette,  provide that any  certificates  for such  additional or  reclassified
securities  shall be pledged to a  deposited  with the  Creditor  as part of the
Pledged Securities pursuant to this Agreement.  Gillette agrees to take all such
action,  including  without  limitation,  signing  such  stock  powers  and  UCC
financing  statements,  as may be  reasonably  requested  from  time  to time by
Creditor to perfect or maintain the security interest of Creditor in the Pledged
Securities.

     5. Rights and Remedies of Creditor; Exercise. j of Same.

     5.1.  Rights  and  Remedies  of  Creditor.  With  respect  to  the  Pledged
Securities,  the Creditor  shall have the rights and remedies of a secured party
under the Uniform  Commercial Code of South  Carolina.  Such rights and remedies
shall include, without limitation:

     (a) The right,  upon the  occurrence of any default  under the  Transaction
Documents or in the payment or performance of any of the  Obligations (an "Event
of Default"), to have the Pledged Securities,  or any part thereof,  transferred
to its name or in the name of its nominee(s);

     (b) The right, upon an Event of Default,  to sell,  assign,  give option or
options to purchase,  contract to sell or  otherwise  dispose of, and deliver as
much of the Pledged  Securities,  or any part thereof, in one or more parcels at
public or private  sale,  at any exchange or broker's  board as the Creditor may
elect,  either for cash or on credit,  and upon such terms and conditions and at
such prices as the Creditor deems best without assumption of any credit risk and
without demand or advertisement (unless otherwise required by law);

     (c) At any such  private  or public  sale of the  Pledged  Securities  then
remaining,  or part  thereof,  the Creditor may purchase and pay for the same by
cancellation of any amount due under the Note, or any other of the  Obligations,
equal to the purchase  price and free of any right of  redemption  on the pan of
Gillette, which right is hereby expressly waived.

     5.2 Exercise of Rights and Remedies by Creditor.  The Creditor may exercise
any and all of its  rights  hereunder  without  demand of  performance  or other
demand,  advertisement  or notice of any kind to or upon  Gillette  or any other
person or entity,  all of which demands,  advertisements  and notices are hereby
expressly waived by Gillette.  However,  notwithstanding the foregoing sentence,
the  Creditor  shall  give then  (10)  days  notice of the time and place of any
public  sale  hereunder  or of the  time  after  which a  private  sale or other
intended disposition may occur. In the event of any sale hereunder, the Creditor
shall apply the proceeds in the order set forth in Section 6 below. The Creditor
may have to resort to the  Pledged  Securities  or any portion  thereof  with no
requirement  on its part to proceed first  against any other  person,  entity or
property.

     6.  Application  of  Proceeds.  The  proceeds  from the sale of the Pledged
Securities  or any pan thereof shall be applied by the Creditor in the following
order:

     (a) First to the  payment of the  reasonable  costs and  expenses  of care,
safekeeping,  collection  and sale incurred by the Creditor,  including  without
limitation,  reasonable  attorneys'  fees  and all  other  reasonable  expenses,
liabilities and costs incurred by the Creditor in connection therewith;

     (b) Next to the  payment  of all  amounts  then owing and  unpaid,  whether
principal,  interest or otherwise, pursuant to the Obligations, in such order as
the Creditor may elect; and

     (c) finally to the payment to Gillette or as required by applicable  law of
any surplus then remaining from such proceeds.


     7. Anticipation and Release of Collateral.

     (a) The  Debtor  may  anticipate  payment  of the  Note in whole or in part
without penalty as specified in the Note.

     (b)  Upon  full  and  complete  payment  and  performance  of  all  of  the
Obligations and upon written notice by Gillette to the Note holder as defined in
the Note,  the Creditor  shall duly transfer and deliver to Gillette the Pledged
Securities deposited hereunder, and this Agreement shall terminate.

     8.  Payment of  Installments  and Release of  Collateral.  Beginning on the
second  anniversary  of this  Agreement,  and  continuing  on every  anniversary
thereafter,  the Creditor shall, at the request of Gillette, release and deliver
to Gillette a number of Trico  Envirometrics,  Inc. stock and options (or shares
if options have been exercised);  provided,  however,  that at no time shall the
Creditor be obligated to release any such options or shares  unless the value of
the shares  retained by the Creditor equals at least two (2) times the amount of
the Obligations then  outstanding.  For purposes of this Section 8, the value of
each option or share of the Pledged  Securities shall be deemed to equal (i) the
anniversary  date, if the security is then traded on a recognized public market,
or (ii) an amount agreed by the parties or  determined by a qualified  appraiser
(who shall be agreeable to the parties and paid for by Gillette) to be the value
of a share of such  security  as of the  applicable  anniversary  date,  if such
security  is not then traded on a  recognized  public  market.  Any shares to be
released to Gillette  pursuant to this Section 8 shall be released within thirty
(30) days of the determination of the value of the Pledged Securities.  Upon the
payment to the  Creditor of all  remaining  unpaid  principal,  interest and all
other  amounts  due  under  the  Note,  the  Creditor  shall  deliver  the stock
certificate or option agreement  evidencing the remaining Pledged  Securities to
Gillette.

     9.  Further  Assurances.  Gillette  agrees  that he will duly  execute  and
deliver  to the  Creditor  any  additional  documents  which  may be  reasonably
requested by Creditor to give effect fully to the security  interest  granted to
the Creditor hereunder.

     10.  Notices.  All notices,  requests and demands to or upon the respective
parties  shall be in writing and shall be deemed to have been given or made when
sent by certified mail, postage prepaid, addressed:

     In the case of Gillette to:

Andrew C. Gillette
4055 Faber Place Drive
Suite 201
Charleston, SC 29405


and
1085 Stonehenge Drive Hanahan, SC 29406

with a copy to:

Steveri L. Smith, Esquire
Smith, Collins & Dusenbury, P.A. 7455 Cross County Road
Suite 1
Charleston, SC 29423

In the case of the Creditor, to:

Envirometrics, Inc.
9229 University Boulevard
Charleston, South Carolina
Attn.: Richard D. Bennett, President

with a copy to:

Timothy D. Scrantom, Esquire
Ten State Street
Charleston, South Carolina

     or to such  other  address  as may be  specified  by any party in a written
notice given to the other parties.

     11.  Governing  Law.  This  Agreement,   and  the  respective   rights  and
obligations  of the  parties  hereunder,  shall be  interpreted,  governed,  and
enforced  according to the laws of South Carolina,  without regard to the choice
of law principles of it or any other jurisdiction.

     12. Venue and in Personam  Jurisdiction.  Any cause of action  arising from
the terms of this Agreement shall be brought only in a state or federal court in
the City of Charleston,  South  Carolina,  which shall be the exclusive and sole
venue for the  adjudication  of any  disputes  hereunder.  Gillette  consents to
exercise by the aforementioned  courts of in personam jurisdiction over him with
respect to any cause of action brought pursuant to this Agreement.

     13. .Parties In Interest. This Agreement shall be binding upon and inure to
the benefit of the successors and assigns of the parties hereto.


     1N WITNESS WHEREOF,  the parties have caused this Agreement  executed as of
the day and year first above written.

ENVIROMETRICS, INC.

By: Richard D. Bennett
President & CEO


By:

Elsie L. Rose, CPA Treasurer

     I, Deborah B. Gillette 1085 Stonehenge Drive, Hanahan, SC 29406 Gillette, a
South Carolina resident, hereby pledge and grant to Envirometrics, Inc. pursuant
to the terms of the foregoing  Pledge  Agreement any and all rights which I many
now or hereafter have in or to any of the Pledged Securities,  as defined in the
foregoing Pledge Agreement,  including without limitation, any and all fights in
or to the Pledged  Securities which may have arisen or at any time hereafter may
arise under the laws of any  jurisdictions  a result of my marital  relationship
with Andrew C. Gillette or otherwise

Deborah B. Gillette Jan 10, 1997