We actually had this in a class in high school and it was quite fun. It's fairly simple, it takes the "negative image" and projects it on paper, burning in an image into a paper that is revealed by a chemical wash. Polaroids simply did away with the extra step of making a negative and put it straight on the paper.
"There ought to be a term that would designate those who actually follow the teachings of Jesus, since the word 'Christian' has been largely divorced from those teachings, and so polluted by fundamentalists that it has come to connote their polar opposite: intolerance, vindictive hatred, and bigotry." -- Philip Stater, Huffington Post
always working on cleaning my windows- me regarding Johari
always working on cleaning my windows- me regarding Johari