> Perhaps the heat was being bounced back by the lighter undercoat? I heard of > a photographer who set up a studio and kept getting a green tinge to his > pictures and he couldn't figure out why. He finally scraped off some of the > white paint and found out the place had been painted green at some earlier point! > Roy Interesting though about your friends studio - it sounds like white paint was acting as a diffuser to the underlying colour in this case, the undercoat was the old paint which was a lot less reflective than the new coat of black. I also did a few tests with this particular paint and found it blocked IR very effectively - and this was the stuff I ended up using on a sandwich layer inside my failed leather bellows to make them usable with IR :) but it's worth shooting a few things to see what is IR reflective or absorbent. like with plants, visible colour is no guide to a plants absorbance or reflectance.. and some cloth is quite transparent as the old Sony video cam fuss revealed k
