Flash and Curing Guidelines: Generally it will take 5-10 washes to fully test the cure, but if the ink is seriously under-cured, the print will show deterioration after only 1-3 washings washes. Another way to test your print quickly is doing the “Stretch Test” stretch the print roughly 2 3 of the T-Shirt; if the print cracks and does not retract back it means you under-cured.