DSF

as title says, what causes these white rough lines on the image, too much heat, too less. They seem to fit in with the burn marks left on the sub paper
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ok, I think I have solved the problem, I set the temp now to 150c and 3 minutes, they are coming out much

Just for future information, it was probably paper sticking to the coating - a by product of too much heat or pressure.

150c???? try 180c for 3min.