Originally Posted by
quiltingcandy
Doubt that it was fax paper - most of those were single papers.
No. Maybe you're thinking of copy paper. Thermal paper came on a roll. And the early fax machines were ALL thermal. What she has IS fax paper. How am I so certain? My husband has worked in that industry for 25 years.
Nowadays faxes (a dying technology) are printed via multi-function laser printers that do print on single, plain copy paper. If her paper turned black or purple when it got hot, it is thermal paper. And since she said it's 8.5" wide, it's for faxes, not receipts.