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How to Make Flash Cotton

Added 2019-06-20 21:12:47 +0000 UTC

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How to Make Flash Cotton

Comments

Hah, Science is happening!

2019-06-21 02:34:08 +0000 UTC

Great work guys, Good prep Jason, seems like you actually used most of my advice, or the same messages from others. To answer some of the questions: (1) Yellow color: In simple terms nitric acid reacts with many things to give very visible yellow to brown colors including skin! You always have impurities present in the cotton and I have no idea what was in the drain cleaner and the stump remover besides sulfuric acid and potassium nitrate (sulfuric acid is not pink!). Even commercial flash cotton is slightly yellow. (2) With the method you used you get a lot of salts (K2SO4, Na2SO4, NaNO3 etc) left over as byproducts. I believe you should have washed it more thoroughly before the final drying. The reason it took a long time to dry and caked up and had good and bad bits is probably because all the salts weren't washed out. Na2SO4 and Na2NO4 are hydroscopic (gets water out of the air). I have never had it come through as non-fluffy as your batch. (Carding with two of those wire brushes sold for pet grooming is a good idea to fluff it.) (3) It is much better to do nitrations with pure sulfuric acid and nitric acids, react 24 hours in the dark keeping cold, and neutralize and wash for a long time with copious water eg a few 24 hour soaks in buckets of pure water before drying. YOU CANNOT WASH TOO MUCH. (4) Drying in the sun is not a great idea, UV and oxygen start breaking flash cotton down, might be the yellowing. Amazing you got away with the aluminum foil, the acid should have eaten holes in it, I guess it was well oxidized or coated.

2019-06-20 23:29:57 +0000 UTC

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