FLOORING AND MAT MATERIALS

摘要

A flooring material having a speckled or mottled surface effect and suitable for use in a clean room is made by a method comprising applying to a substrate absorbent backing sheet a mixture of polyvinyl chloride and plasticiser and a first colouring material, applying droplets of further polyvinyl chloride and plasticiser containing a second colouring material, curing the mixture applied to the sheet by heating, and rolling and cooling to form the final product.