That article has a good alternative though: ascorbic acid. I think the last time I looked into this I had a hard time finding thermal labels that used ascorbic

That article has a good alternative though: ascorbic acid. I think the last time I looked into this I had a hard time finding thermal labels that used ascorbic acid, but they at least have receipt paper. I do still have concerns that even the ascorbic acid paper still has something bad in it absent any documentation going over the full ingredient list.