Methods of salvaging improperly processed resinous

In the art of making chemically embossed sheets of resinous material, a method of salvaging a backing sheet material and a potentially foamable, gelled plastisol composition on which has been improperly applied a printing ink composition containing an organic anhydride blow-modifier which comprises:

• (1) applying a potentially foamable plastisol composition containing a blowing agent to a backing sheet material;
• (2) heating said potentially foamable plastisol composition to a temperature of from about 240.degree. to about 420.degree. F. whereby it gels and becomes firm without being blown or foamed;
• (3) applying a printing ink composition containing an organic anhydride blow-modifier to the gelled, potentially foamable plastisol composition;
• (4) inspecting the application of said printing ink composition containing said anhydride blow-modifier within about 4 hours after application to determine the appropriateness of such application and, if said printing ink composition is improperly applied;
• (5) treating said printing ink composition containing said anhydride blow-modifier and said potentially foamable, gelled plastisol composition with a neutralizing and negating composition capable of rendering substantially ineffectual the blow-modifying properties of said anhydride blow-modifier without rendering ineffectual the blowing properties of said potentially foamable, gelled plastisol composition, said neutralizing and negating composition comprising (a) a water soluble chemical having a solvent, swelling and softening effect on said printing ink composition and (b) a reactive chemical capable of reacting with said anhydride blow-modifier, said neutralizing and negating composition being in contact with said printing ink composition for a total exposure time of from about 2 seconds to about 30 seconds;
• (6) reprinting said potentially foamable, gelled plastisol composition with a printing ink composition containing a blow-modifier;
• and (7) blowing said potentially foamable, gelled plastisol composition, whereby chemically embossed effects are obtained as a result of said blow-modifier used in the reprinting process, rather than said blow-modifier used in the initial printing process.