https://en.wikipedia.org/wiki/Cellulose_acetate dates back to the 19th century; tough enough to be used for films and eyeglass frames.
Production involves some chems: "cellulose [pulp] is reacted with acetic acid and acetic anhydride in the presence of sulfuric acid."
Acetic anhydride is restricted in some countries because it's used in making heroin.
https://en.wikipedia.org/wiki/Cellulose_acetate dates back to the 19th century; tough enough to be used for films and eyeglass frames.
Production involves some chems: "cellulose [pulp] is reacted with acetic acid and acetic anhydride in the presence of sulfuric acid."
Acetic anhydride is restricted in some countries because it's used in making heroin.