The following companies deal with Proofing Substrates:



All Printing Resources Inc.
ChemInstruments Inc.
Dansen Prepress Corp.
DuPont Imaging Technologies
Eastman Kodak Company
Econo Products Inc.
GMG Americas
IGT Testing Systems Inc.
Latran Technologies
MACtac (Morgan Adhesives Company)
RK Print Coat Instruments Ltd.
Trinity Graphic USA