This liquid color is a free flowing concentrated liquid color for use on any untreated fabric. It will spread on fabric until it is thoroughly absorbed and even. Every fabric has a different flow and spread. It is magical on silk but works on any type of fiber: natural and synthetic. It is an incredibly versatile color perfect for silk painting, spritzing through stencils, sponge painting and simplified batik or wax resist effects. Requires heat fixing by ironing or being placed in a clothes dryer. This package contains one 2-1/2oz bottle. Conforms to ASTM D 4236.