741 Poly White is a ultra low bleed, high pigment, fast flashing, low tack, non-phthalate plastisol screen printing ink and is specifically formulated to help block dye migration problems on various problem polyester content fabrics. Cure temperature is 275 to 325 degrees.
For optimum bleed resistance, use an 86 t/in or 34 t/cm mesh screen base plate and overprint with an 110 t/in or 43 t/cm mesh screen Avoid over-flashing, as it can result in poor inter-coat adhesion of overprinted colors or increased dye migration. Adjust flash settings so that the ink is just dry to the touch.
741 Poly White is an ultra low bleed ink, not a non-bleed ink. On some types of fabric, bleeding or dye migration may occur. Always test print the fabric to be printed before beginning production. It is best to do some long term testing on fabrics to determine if they are going to bleed. Bleeding or dye migration may not occur right away. Dwell time should be increased to adjust for thick ink deposit. Failure to fuse the ink properly may result in cracking, poor adhesion and poor wash fastness. Higher than recommended temperatures or longer than necessary dwell times may increase dye migration. Adding any reducers or additives can lower the bleed resistance, opacity, or increase cure times of ink. STIR the ink prior to printing on press and after addition of reducers or additives. Test dryer temperatures and wash test printed product before and during a production run.