Improvements for in-mold polyurethane foam andor resin products and the ability to provide surface coatings of such products exhibiting bright coloration and reduced colorant migration through utilization of easy-to-use polymeric colorants in simplified and environmentally friendly processing methods are disclosed. A computer program reads in two files, an input data file and a recipe text file. The respective fuel gas manifold apertures are disposed opposite to the cooling water manifold apertures.