I`d suggest that you look at the back of the packet. It`ll tell you there what materials are suitable for dying. Woolworth sell different kinds of dyes
viscose dyes well I'm sure. I'd suggest the pouches of dye that Asda & other supermarkets now sell. Its by Dylon & unlike the Dylon box dyes, you don't have to use loads of salt - just bung everything in the washing machine & let it do its work. brilliant. hope this helps. you could always visit http://www.dylon.co.uk/main.htm for info. hope this helps.