I also used a digital thermometer to get at least a ballpark idea of the heat from the embossing gun I use, and found that if I keep the pen about 6" away from the heat source, I get a pretty consistent temp range in the 120-130 degree area, which is what I have read is appropriate without damage.
I obviously got a bit more impatient after 3 weeks of working on it. Insert sad face.
~ Jon
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