after printing you need to set them aside for 24+ hours to 'cure' then heat set...i sometimes cure/heat set a number of times for a week before even testing to see if the colors will run...make sure sizing has been removed from the fabric before printing on it (wash and dry it before using...no fabric softener)or use PDF's (prepared for dying fabric)the bubble jet works good. there is also retayne. pre-washing, curing and heat setting is manditory! then when ready to test run cold water through and see what happens