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December 30, 2020 02:52 pm GMT
Original Link: https://boingboing.net/2020/12/30/hot-trick-for-blacking-out-thermal-paper-labels.html
Hot tip for blacking out thermal paper labels
The easiest way to black out thermal paper (for example, to remove addresses or barcodes that would make it risky to re-use a box) is to heat it up: no marker necessary! Why use the Sharpie you already have when you could risk everything by instead applying fire?
Original Link: https://boingboing.net/2020/12/30/hot-trick-for-blacking-out-thermal-paper-labels.html
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