Thick textured water based Setasilk guttas, can be used for outlining. Apply the Gutta to the silk fabric before applying the silk paint - Setasilk. The Gutta will flow through the silk creating a a barrier to the Setasilk paint. The Gutta will air dry in 30 minutes, after which time you can fix with a hot iron on the reverse of the fabric. 48 hours after fixing, the colours will be resistant to hand washing and dry cleaning except for the clear gutta, which is especially formulated to be removable by washing.