I am always amazed at the amount of dye that can come out of Batiks... it is amazing that it just keeps coming out .. and sometimes its colors that you really did not think were in the fabric.
The only way to really stop the bleed is Retayne. Vinegar and salt is not effective on batiks or any other cotton fabric. You can mail order Retayne friom several sources I think even Amazon.
Color catchers only absorb what is released. If you want to stop it ... Retayne. Ironically I just finished treating a bunch myself .. to bad you were not closer I run over with some.
http://www.amazon.com/Retayne-Color-.../dp/B000YZ5HL8