Carbonless copy paper, used to make countless copies of forms, is a 109 kg business annually. Copies are made when the pressure of a pen ruptures microcapsules that contain a dye precursor, initiating a chemical reaction between the dye precursor in the top page and an acid source in the bottom page.
No takes yet. Share an insight, caveat, or question.
Mary Anne White (1998) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: