G&S Dyes, T.N.A.soap, 500ml bottle. High quality soap for dyers. This product is a ph-balanced, concentrated non-ionic soaping agent used in the initial dyeing process and after dyeing. It removes sizing and is excellent for light-coloured areas by preventing contact bleeding of excessive dye particles during the after wash. It also works as a wetting agent during dyeing processes. Similar to Synthrapol Soap.