We've been in the business for 20 years and have recently been having trouble with ink cracking and rubbing off with your fingers. We thought it was our very old dryer and have since gotten a new dryer. Designs that give us trouble are multiple color designs with a white underbase. We are doing print-flash-print on each color. The Flash temperature gets up to 350 each time. Then we are curing in the dryer at a constant temperature between 310 and 320 for at least 30 seconds. Not sure what the problem still is. Thanks in advance for any help.