richard avedon did it when he was a kid ...
sun print on skin ... the negative to an arm lay out in the sun ...

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people that restore stagecoaches would know where to get large sheets
of isinglass ( mica ) ..

some isinglass can be found here

http://www.homesteadstoves.com/Stove%20Mica.htm

years ago i found a dealer in the yellow pages and got some samples mailed to me.