Hello everyone,
I have started doing mug sublimation since couple of months. Everything was going good but today black spot (5 mm horizontal & 2 mm vertical) appears on mug after sublimation. Total there are 6 spots in vertical line. Those spots appear on same place on every mugs now.
I have tried with plain sublimation paper and plain mug also but still those black spots are showing.
please help me guys.
Im using pneumatic mug press which i bought from coralgraph and white mugs also.