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Feb 25, 2019 at 22:43 comment added BrettFromLA @nielsnielsen I think you should copy the comment onto the original question too! Other readers will want to know about thermal paper, and they may not read the comments on my answer.
Feb 25, 2019 at 20:59 comment added niels nielsen no, i meant to put it on the OP's question, sorry if i did it wrong. -NN
Feb 25, 2019 at 17:40 comment added BrettFromLA @nielsnielsen Did you mean to put this comment on my answer, or on the original question? My answer doesn't mention the doodling, but the original question does.
Feb 25, 2019 at 6:24 comment added niels nielsen the ink "doodled" because the receipt was printed on thermal paper which contains ink encapsulated in wax. the heat melted all the wax and released all the ink.
Feb 24, 2019 at 16:11 history answered BrettFromLA CC BY-SA 4.0