Using heat and acid to reduce cyanotype exposure times!

In this video I am re visiting some tests I did a few years ago on trying to reduce exposure times for cyanotypes. The main reason for this was because back when I was running these tests I had not optimized my UV light source or negatives for use in projection/enlargement . So i am re visiting these tests I did to see if there is still anything useful from them. I believe if everything is optimized 30 minute exposures could be possible for a 8X10 cyanotype enlargement! I am going to upload a bonus video after this one where I take some of these principles and attempt to make a 24"X48" cyanotype! See my other videos on how to modify a projector to do the same types of enlargements!