MINING MATERIALS PURCHASE AGREEMENT

     This  Mining Materials Purchase Agreement (the "Agreement") is entered into
as  of  March  26,  2003  (the "Effective Date") by and between RAMMSCO, Inc., a
Nevada  corporation  ("RAMMSCO" or the "Seller") and Humatech, Inc., an Illinois
corporation ("Humatech" or the "Purchaser").  Each of Seller and Purchaser shall
be  referred  to  as  a  "Party"  and  collectively  as  the  "Parties."

                                    RECITALS

     A.     Seller  owns  certain mining rights (the "Mining Rights") to acquire
certain  materials  (the "Materials") from a designated area (the "Area") as set
forth  in  Exhibit  A  attached  hereto  (collectively  the  "Properties");

     B.     Seller  desires  to  sell,  and  Purchaser  desires to purchase, the
Materials  on  the  terms  and  conditions  set  forth  in  this  Agreement.

     NOW,  THEREFORE, in consideration of the covenants and conditions contained
herein,  Seller  and  Purchaser  agree  as  follows:

                                    ARTICLE I
                                  CONSIDERATION

     1.1    As consideration for the obligations of Seller under this Agreement,
including  but  not  limited to the terms of Materials purchases as set forth in
Article  II,  the exclusivity set forth in Article III, and the option and right
of  first  refusal  set  forth  in  Article V, Purchaser shall pay to Seller the
consideration  set  forth  in  Exhibit  B  (the  "Agreement  Consideration").

     1.2    The  Agreement Consideration shall be deemed earned by Seller as  of
the  Effective  Date  of  this  Agreement, and shall not be subject to return or
cancellation  upon  termination  of  this  Agreement,  regardless  of  when this
Agreement  may  terminate.

                                   ARTICLE II
                           TERMS OF MATERIALS PURCHASE

     2.1    During  the  term  of  this  Agreement,  Seller  agrees  to sell  to
Purchaser,  from  time  to  time  as  requested  by Purchaser, any or all of the
Materials.

     2.2    As  consideration for the purchase of the Materials, Purchaser shall
pay  the  following:

            A.    Purchaser  shall  pay  all  direct  costs  of  extracting  the
Materials,  with  all  such  payments  being  made  directly by Purchaser to the
parties  to whom payment is due (the "Materials Extraction Costs"). For purposes
of  this  Agreement,  Material  Extraction  Costs includes any fines, penalties,
assessments, liabilities (including workers  compensation  and/or  tort liabili-
ties)  arising  as  a  result  of  Purchaser's  extraction of the Materials. Any
third-party  who may be contracted by Purchaser for extraction services shall be
approved,  in writing, by Seller prior to the start of any extraction. Purchaser
may  contract with Seller for certain extraction services, with consideration to
be  negotiated  and  paid  separate  from  this  Agreement.

<PAGE>
            B.    Purchaser  shall  pay  to  Seller,  within thirty (30) days of
the delivery of any Materials to Purchaser, a (i) Bureau of Land Management cost
reimbursement  payment,  (ii) reclamation reserve payment, (iii) Non-accountable
expense  reimbursement  payment,  and  (iv) Material royalty payment, all as set
forth  on  Exhibit  C  (collectively,  the  "Materials  Payments").

                                   ARTICLE III
                         EXCLUSIVITY AND CONFIDENTIALITY

     3.1    During  the  term  of  this  Agreement,  Seller  shall not  sell, or
negotiate  or  enter  into any agreements to sell, any of the Properties, Mining
Rights,  Materials,  or  other  rights  or materials from or to the Area, to any
party  other  than  Purchaser.

     3.2    The  financial  terms of this Agreement and all information relating
to  the  Properties  that  is  derived  pursuant to this Agreement, shall be the
exclusive  property  of  the  Parties  and  shall  be  treated by the Parties as
strictly  confidential  and  shall not be disclosed to any third parties without
the  prior  written  consent  of both Parties hereto, which consent shall not be
withheld unreasonably. Following notice to the other Party and provided that the
third  party  agrees  in  writing  to treat the same as confidential to the same
extent  as the Parties are hereby obligated, it is specifically agreed that such
information  may  be  provided  without  the  consent  of  the  other Party, to:

          (a)     lending institutions or lenders,  for  purposes  of  obtaining
financing;

          (b)     to  an affiliate, consultant, contractor or subcontractor that
has  a  bona  fide  need  to  be  informed;  or

          (c)     to  a  governmental  agency  (including without limitation the
SEC)  or  to  the  public  which  the disclosing Party believes in good faith is
clearly  required  by  pertinent  law  or  regulation  or the rules of any stock
exchange;  provided  however, that if there is a readily ascertainable statutory
or  regulatory  procedure  available  to  maintain  some or all of the disclosed
information  confidential,  then  prior  to  or  simultaneously with making such
disclosure  the disclosing Party shall seek protection for the information being
disclosed  to  the  maximum  extent  such  protection  is  available.

     This  Section 3.2 shall survive the termination of this Agreement and shall
remain  in  effect  for  two  (2)  years  following  the  date  of  termination.

                                   ARTICLE IV
                              TERM AND TERMINATION

     4.1    The  term  of this Agreement shall be for twenty (20) years from the
Effective  Date,  unless  earlier  terminated  as  provided  herein.

<PAGE>
     4.2    This  Agreement  may be  terminated by Seller, upon thirty (30) days
written  notice,  during  which  time the Purchaser shall have an opportunity to
cure  the default without further recourse or damages, upon any of the following
(an  "Event  of  Default"):

            A.    The  failure  of  Purchaser  to  pay  any  of  the   Agreement
Consideration,  Materials  Extraction Costs, or the Materials Payments when they
become  due;

            B.    The  material  breach  of  any  representation  or warranty in
this Agreement;

            C.    The  breach  of  any covenant  or  undertaking,  not otherwise
provided for  in  this  Section  4.2;

            D.    A  default  shall  occur  in  the  payment  when due  (subject
to  any  applicable  grace period), whether by acceleration or otherwise, of any
indebtedness  of  the  Purchaser  or  an event of default or similar event shall
occur  with respect to such indebtedness, if the effect of such default or event
(subject  to  any  required  notice and any applicable grace period) would be to
accelerate  the  maturity  of  any  such indebtedness or to permit the holder or
holders  of  such  indebtedness  to  cause  such  indebtedness to become due and
payable  prior  to  its  express  maturity,  and it will have a material adverse
effect  on  the  operations  of  Purchaser;

            E.    The  commencement by the Purchaser of any voluntary proceeding
under  any  bankruptcy, reorganization,  arrangement,  insolvency,  readjustment
of debt, receivership,  dissolution,  or  liquidation  law  or  statute  of  any
jurisdiction,  whether  now  or  hereafter in effect; or the adjudication of the
Purchaser  as  insolvent  or  bankrupt  by  a  decree  of  a  court of competent
jurisdiction;  or the petition or application by the Purchaser for, acquiescence
in,  or  consent by the Purchaser to, the appointment of any receiver or trustee
for  the  Purchaser  or  for  all  or  a substantial part of the property of the
Purchaser;  or  the assignment by the Purchaser for the benefit of creditors; or
the written admission of the Purchaser of its inability to pay its debts as they
mature;  or

            F.    The  commencement  against  the  Purchaser  of  any proceeding
relating  to  the  Purchaser  under any bankruptcy, reorganization, arrangement,
insolvency,  adjustment of debt, receivership, dissolution or liquidation law or
statute  of  any  jurisdiction,  whether  now  or hereafter in effect; provided,
however,  that  the  commencement  of  such a proceeding shall not constitute an
Event  of Default unless the Purchaser consents to the same or admits in writing
the  material  allegations  of same, or said proceeding shall remain undismissed
for  twenty  (20) days; or the issuance of any order, judgment or decree for the
appointment  of  a  receiver  or  trustee  for  the  Purchaser  or  for all or a
substantial  part  of  the  property  of the Purchaser, which order, judgment or
decree  remains  undismissed  for  twenty (20) days; or a warrant of attachment,
execution,  or  similar  process shall be issued against any substantial part of
the  property  of  the  Purchaser.

     4.3    This  Agreement  may  be  terminated  by Purchaser, upon thirty (30)
days  written  notice, during which time the Seller shall have an opportunity to
cure  the default without further recourse or damages, upon any of the following
(an  "Event  of  Default"):

<PAGE>
            A.    The  failure  of  Seller  to make available the Materials when
requested by  Purchaser;

            B.    The  termination,  whether by their terms or as a result of  a
breach  thereof,  of  any  agreement  or  agreements  which grants to Seller its
interest  in  the  Properties;

            C.    The  material  breach  of  any  representation  or warranty in
this Agreement;

            D.    The  breach  of  any covenant or  undertaking,  not  otherwise
provided for  in  this  Section  4.3;

            E.    A  default  shall  occur  in  the payment when due (subject to
any  applicable  grace  period),  whether  by  acceleration or otherwise, of any
indebtedness  of  the Seller or an event of default or similar event shall occur
with  respect  to  such  indebtedness,  if  the  effect of such default or event
(subject  to  any  required  notice and any applicable grace period) would be to
accelerate  the  maturity  of  any  such indebtedness or to permit the holder or
holders  of  such  indebtedness  to  cause  such  indebtedness to become due and
payable  prior  to  its  express  maturity,  and it will have a material adverse
effect  on  the  operations  of  Seller;

            F.    The commencement by the Seller  of  any  voluntary  proceeding
under  any  bankruptcy, reorganization,  arrangement,  insolvency,  readjustment
of debt, receivership,  dissolution,  or  liquidation  law  or  statute  of  any
jurisdiction,  whether  now  or  hereafter  in  effect;  or  the adjudication of
the Seller as insolvent or  bankrupt  by  a  decree  of  a  court  of  competent
jurisdiction; or the petition or application by the Seller for, acquiescence in,
or  consent by the Seller to, the appointment of any receiver or trustee for the
Seller  or  for  all or a substantial part of the property of the Seller; or the
assignment  by the Seller for the benefit of creditors; or the written admission
of  the  Seller  of  its  inability  to  pay  its  debts  as  they  mature;  or

            G.    The  commencement  against  the  Seller  of  any  proceeding
relating  to  the  Seller  under  any  bankruptcy,  reorganization, arrangement,
insolvency,  adjustment of debt, receivership, dissolution or liquidation law or
statute  of  any  jurisdiction,  whether  now  or hereafter in effect; provided,
however,  that  the  commencement  of  such a proceeding shall not constitute an
Event of Default unless the Seller consents to the same or admits in writing the
material  allegations  of  same, or said proceeding shall remain undismissed for
twenty  (20)  days;  or  the  issuance  of any order, judgment or decree for the
appointment  of a receiver or trustee for the Seller or for all or a substantial
part  of  the  property  of  the Seller, which order, judgment or decree remains
undismissed  for  twenty  (20)  days;  or a warrant of attachment, execution, or
similar  process shall be issued against any substantial part of the property of
the  Seller.

                                    ARTICLE V
             OPTION FOR ADDITIONAL MATERIALS; RIGHT OF FIRST REFUSAL

     5.1    During  the term  of this Agreement, Purchaser shall have the option
to  purchase  from  Seller,  on  terms  and  conditions to be agreed upon by the
Parties,  any  other  materials which may be derived from Seller's Mining Rights
for  the  Area.

<PAGE>
     5.2    During  the  term  of  this  Agreement,  and for a period of two (2)
years  thereafter,  Purchaser shall have a right of first refusal as against any
third party to purchase the Mining Rights and Materials derived from the Area on
terms  identical  to  those  which  may  be  offered  to  Seller.

                                   ARTICLE VI
                 REPRESENTATIONS AND WARRANTIES; INDEMNIFICATION

     6.1    As  of the Effective Date, each Party warrants and represents to the
other  that:

            A.    it is a corporation duly organized and in good standing in its
state  of  incorporation and is qualified to do business and is in good standing
in  those  states  where  necessary  in  order to carry out the purposes of this
Agreement;

            B.    it has the capacity to enter into and perform  this  Agreement
and  all  transactions  contemplated  herein  and  that  all corporate, board of
directors,  shareholder,  surface  and mineral rights owner, lessor, lessee, and
other  actions required to authorize it to enter into and perform this Agreement
have  been  properly  taken;

            C.    it  will  not  breach  any  other  agreement or arrangement by
entering into  or  performing  this  Agreement;

            D.    it  is  not  subject  to  any  governmental  order,  judgment,
decree, debarment, sanction or laws that would preclude the actions contemplated
by  this  Agreement;

            E.    this  Agreement  has  been  duly executed and delivered by  it
and is valid  and  binding  upon  it  in  accordance  with  its  terms.

     6.2    As  of  the  Effective  Date,  Seller  represents  and  warrants  to
Purchaser  that:

            A.     With  respect  to  the  Properties  in which Seller holds  an
interest  under leases or other contracts: (i) Seller is in exclusive possession
of such Properties; (ii) Seller has not received any notice of default of any of
the  terms or provisions of such leases or other contracts; (iii) Seller has the
authority  under such leases or other contracts to perform fully its obligations
under  this  Agreement;  (iv)  to  Seller's  knowledge,  such  leases  and other
contracts are valid and are in good standing; (v) Seller has no knowledge of any
act  or omission or any condition on the Properties which could be considered or
construed  as a default under any such lease or other contract; (vi) to Seller's
knowledge,  such Properties are free and clear of all encumbrances or defects in
title;  (vii)  to Seller's knowledge, there are no pending or threatened action,
suits,  claims  or  proceedings,  and  there  have been no previous transactions
affecting  its  interests  in  the  Properties  which  have  not  been  for fair
consideration;  (viii) to Seller's knowledge, the conditions existing on or with
respect  to the Properties and its ownership and operation of the Properties are
not  in violation of any laws (including without limitation environmental laws),
or  causing  or  permitting  any  damage  (including  environmental  damage)  or
impairment  to  the  health,  safety,  or  enjoyment  of any person at or on the
Properties  or  in  the  general  vicinity  of  the Properties; (ix) to Seller's
knowledge,  there  have  been  no  past  violations  by  it  or  by  any  of its
predecessors  in  title  of  any  environmental  laws or other laws affecting or
pertaining  to  the  Properties,  nor  any past creation of damage or threatened
damage  to  the  air,  soil, surface waters, groundwater, flora, fauna, or other
natural  resources  on, about, or in the general vicinity of the Properties; and
(x)  Seller  has  not received inquiry from or notice of a pending investigation
from  any  governmental  agency  or of any administrative or judicial proceeding
concerning  the  violation  of  any  laws.

<PAGE>
            B.    Seller  has  delivered  or  made  available  for inspection by
Purchaser  all  existing  data  concerning  the Properties, and true and correct
copies  of  all  leases  or  other  contracts  relating  to  the  Properties.

     6.3    The  representations  and  warranties  set forth above shall survive
the  termination  of this Agreement.  For a representation or warranty made to a
Party's  "knowledge,"  the  term  "knowledge" shall mean actual knowledge on the
part  of  the  officers,  employees, and agents of the representing Party, or of
facts  that  would  reasonably  lead  to  the  indicated  conclusions.

     6.4    Each Party shall indemnify the other Party, its directors, officers,
affiliates,  employees,  agents,  and  attorneys (collectively, the "Indemnified
Parties")  from  and  against  all  costs,  expenses,  damages  or  liabilities,
including  attorneys'  fees  and other costs of litigation (either threatened or
pending)  arising  out of or based on a breach by a Party of any representation,
warranty,  or  covenant  contained  in this Agreement. If any claim or demand is
asserted against an Indemnified Party in respect of which such Indemnified Party
may  be entitled to indemnification under this Agreement, written notice of such
claim  or  demand  shall  promptly  be  given  to  the  Indemnifying  Party. The
Indemnifying  Party  shall  have the right, but not the obligation, by notifying
the Indemnified Party within thirty (30) days after its receipt of the notice of
the  claim  or  demand, to assume the entire control of (subject to the right of
the  Indemnified  Party  to  participate, at the Indemnified Party's expense and
with  counsel  of  the  Indemnified Party's choice), the defense, compromise, or
settlement  of  the  matter,  including,  at  the  Indemnifying Party's expense,
employment  of  counsel  of  the Indemnifying Party's choice. Any damages to the
assets  or  business  of  the  Indemnified  Party  caused  by  a  failure by the
Indemnifying  Party  to  defend,  compromise,  or  settle a claim or demand in a
reasonable  and expeditious manner requested by the Indemnified Party, after the
Indemnifying  Party has given notice that it will assume control of the defense,
compromise,  or  settlement  of the matter, shall be included in the damages for
which  the  Indemnifying  Party  shall be obligated to indemnify the Indemnified
Party.  Any settlement or compromise of a matter by the Indemnifying Party shall
include  a full release of claims against the Indemnified Party which has arisen
out  of  the  indemnified  claim  or  demand.

                                   ARTICLE VII
                               GENERAL PROVISIONS

     7.1    Nothing  contained  in this Agreement shall be deemed to  constitute
either  Party as a partner or the venturer of the other, or, except as otherwise
herein  expressly  provided,  to  constitute  either  Party  the  agent or legal
representative  of  the  other,  or to create any fiduciary relationship between
them.

<PAGE>
     7.2    There  are  no  implied covenants contained in this Agreement  other
than  those  of  good  faith  and  fair  dealing.

     7.3    This  Agreement shall be construed to benefit the Parties and  their
respective  successors  and  assigns  only, and shall not be construed to create
third  party  beneficiary  rights  in  any  other  party  or in any governmental
organization  or  agency.

     7.4    Except  for  matters  of  title  to  the Properties, which shall  be
governed  by  the  law  of  their situs, this Agreement shall be governed by and
interpreted  in accordance with the laws of the State of Arizona, without regard
for  any  conflict  of  laws  or  choice of laws principles that would permit or
require  the  application  of  the  laws  of  any  other  jurisdiction.

     7.5    The  Parties  consent to the jurisdiction of any court of the  State
of  Arizona  and  of  any  federal  court  located  in  Arizona.

     7.6    Should  suit  be  brought  to enforce or interpret any part of  this
Agreement,  the  prevailing party shall be entitled to recover, as an element of
the  costs of suit and not as damages, reasonable attorneys' fees to be fixed by
the  court  (including  without  limitation,  costs,  expenses  and  fees on any
appeal).  The  prevailing party shall be the party entitled to recover its costs
of  suit,  regardless  of whether such suit proceeds to final judgment.  A party
not  entitled  to  recover its costs shall not be entitled to recover attorneys'
fees.  No  sum for attorneys' fees shall be counted in calculating the amount of
a  judgment  for purposes of determining if a party is entitled to recover costs
or  attorneys'  fees.

     7.7    All  notices,  payments,  and  other  required or permitted communi-
cations  shall  be  in  writing,  and  shall  be  addressed  as  follows:

If  to  Seller:          RAMMSCO,  Inc.
                         1203  Turncreek  Lane
                         Katy,  TX  77450

If  to  Purchaser:       Humatech,  Inc.
                         1718  Fry  Road,  Suite  450
                         Houston,  TX  77084

     All  notices  shall  be given (a) by personal delivery to the Party, (b) by
facsimile,  (c) by registered or certified mail return receipt requested; or (d)
by  overnight or other express courier services.  All notices shall be effective
and  shall  be  deemed  given on the date of receipt at the principal address if
received  during  normal  business  hours,  and,  if  not received during normal
business  hours,  on  the next business day following receipt.  Either Party may
change  its  address  by  notice  to  the  other  Party.

<PAGE>
     7.8    The  headings  in this  Agreement are provided for convenience only,
and  shall  not  affect  the  construction  or  interpretation  of  any  of  its
provisions.

     7.9    The  failure of  either Party to insist on the strict performance of
any provisions of this Agreement or to exercise any right, power, or remedy upon
a breach hereof shall not constitute a waiver of any provision of this Agreement
or  limit such Party's right thereafter to enforce any provision or exercise any
right.

     7.10   No  modification  of  this  Agreement  shall be valid unless made in
writing  and  duly  executed  by  each  Party.

     7.11   Except  for  the obligation to make payments when due hereunder, the
obligations  of a Party shall be suspended to the extent and for the period that
performance  is  prevented  by  any cause, whether foreseeable or unforeseeable,
beyond  its  reasonable  control,  including, without limitation, labor disputes
(however  arising  and  whether or not employee demands are reasonable or within
the power of the Party to grant); acts of God; laws, instructions or requests of
any  government  or  governmental  entity;  judgments  or  orders  of any court;
inability  to  obtain  on  reasonably  acceptable  terms  any  public or private
license,  permit or other authorization; curtailment or suspension of activities
to  remedy  or  avoid  an actual or alleged, present  or  prospective  violation
of environmental  laws;  action  or  inaction by any  federal,  state  or  local
agency that delays or prevents the issuance  or  granting  of  any  approval  or
authorization  required to conduct operations beyond the reasonable expectations
of  the Party seeking the approval or authorization; acts of  war  or  terrorism
or conditions arising out  of  or  attributable  to  war,  whether  declared  or
undeclared;  riot,  civil  strife,  insurrection  or rebellion; fire, explosion,
earthquake,  storm,  flood,  sink  holes,  drought  or  other  adverse  weather
condition;  delay  or  failure by suppliers or transporters of materials, parts,
supplies,  services  or equipment or by contractors' or subcontractors' shortage
of,  or  inability  to  obtain,  labor,  transportation,  materials,  machinery,
equipment,  supplies,  utilities or services; accidents; breakdown of equipment,
machinery  or facilities; actions by native rights groups, environmental groups,
or  other similar special interest groups; or any other cause whether similar or
dissimilar  to  the foregoing.  The affected Party shall promptly give notice to
the  other Party of the suspension of performance, stating therein the nature of
the  suspension,  the  reasons therefor, and the expected duration thereof.  The
affected  Party  shall  resume  performance  as  soon  as  reasonably  possible.

     7.12   Each  Party  shall  take, from  time  to time and without additional
consideration,  such  further actions and execute such additional instruments as
may  be reasonably necessary or convenient to implement and carry out the intent
and  purpose  of  this  Agreement.

     7.13   This  Agreement  contains  the  entire  understanding of the Parties
and  supercedes  all  prior  agreements  and  understandings between the Parties
relating to the subject matter hereof.  This Agreement shall be binding upon and
inure  to  the benefit of the respective successors and permitted assigns of the
Parties.

     7.14   This  Agreement  may  not  be assigned  by  either Party without the
express  written  consent  of  the  other  Party.

     7.15   This  Agreement  may  be executed in any number of counterparts, and
it  shall  not  be necessary that the signatures of both Parties be contained on
any  counterpart.  Each  counterpart  shall  be  deemed  an  original,  but  all
counterparts  together  shall  constitute  one  and  the  same  instrument.

<PAGE>
     7.16   The  Parties  acknowledge  that this Agreement was prepared by legal
counsel  to  the  Purchaser,  who  did not and has not represented Seller.  Each
Party has had the opportunity to have its legal counsel review this Agreement on
its behalf.  If an ambiguity or question of law or intent arises with respect to
any  provision  of this Agreement, the Agreement will be construed as if drafted
jointly  by  the Parties.  The Parties expressly agree that the construction and
interpretation  of  this  Agreement  shall not be strictly construed against the
drafter.


<PAGE>
     IN  WITNESS  WHEREOF, the Parties hereto have executed this Agreement as of
the  Effective  Date.


"Seller"                             "Purchaser"

RAMMSCO,  Inc.                       Humatech,  Inc.


/s/  David  Williams                 /s/  David  Williams
--------------------------           ---------------------------
By:  David  Williams                 By:  David  Williams
Its:  President                      Its:  President



Attested:                            Attested:


/s/  John  D.  Rottweiler            /s/  John  D.  Rottweiler
---------------------------          ---------------------------
By:  John  D.  Rottweiler            By:  John  D.  Rottweiler
Its:  Secretary                      Its:  Secretary


<PAGE>
                                    EXHIBIT A
                       MINING RIGHTS, MATERIALS, AND AREA

*    The  description of Mining Rights, Materials, and the Area included in this
     exhibit  has  been  omitted  as confidential and filed with the Commission.

<PAGE>
                                    EXHIBIT B
                             AGREEMENT CONSIDERATION

     12,500,000  shares of Humatech, Inc. common stock, restricted in accordance
with  Rule  144.  The  Parties  agree  that  the value assigned to the shares of
common  stock  shall  be  $10,625,000,  calculated  by taking the 30-day average
closing  price  of Purchaser's common stock ($0.85 per share) and multiplying it
by  the  number  of  shares  to  be  issued.

<PAGE>
                                    EXHIBIT C
                               MATERIALS PAYMENTS

*    The  description  of  Materials  Payments included in this exhibit has been
     omitted  as  confidential  and  filed  with  the  Commission.