This was a question posed by a Printwear reader, and here is Kieth Stevens’ response:
This issue happens at times when using a white underbase ink that contains a blowing agent. The blowing agent helps improve opacity and control dye migration. However, the blowing agent contains microbeads that inflate when cured, and some may pop, leaving a hole in the inks printed on top. To help mitigate this issue, use a quality white ink that does not contain a blowing agent, or flash the white a little longer to get the blowing agent to begin puffing earlier. Over-curing the ink may be another cause for the popping as well.
International Coatings manufactures a complete line of Centris™ non-Phthalate screen printing inks, including a wide variety of whites, specialty inks, special effects inks,color matching systems, additives and reducers. In addition, International Coatings also manufactures a line of AXEON™ non-Phthalate, non-PVC special effects inks. For more information on our products, please visit our website at www.iccink.com.
Filed under: General, How-To, Printing Tips Tagged: #iccinks, #icinks, #internationalcoatings, #internationalcoatingsink, #KiethStevens, #ScreenPrintingInks, #ScreenWeb, #Tips, avoiding white spots, color, how to screen print, How-To, iccink, iccink.com, Ink, international coatings inks, Kieth Stevens, printing, screen printing, screen printing inks, screen printing know how, screen printing tips, screenprint, Screenprinting, white spots
from International Coatings Blog https://internationalcoatings.wordpress.com/2017/05/09/how-do-i-avoid-the-white-spots-that-pop-up-on-my-garment-after-curing/
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