

It relies on a "microcapsule chemical reaction" — the back has microcapsules with colorless dyes (color-forming layer), and the front has acidic color developers (color-receiving layer). Pressure breaks microcapsules, and dyes react with developers to show visible colors, no extra carbon paper needed.
No, just use by purpose:
Rolls/sheets: Stack "color-forming layer paper" and "color-receiving layer paper" for printer pressure-triggered copying.
NCR pads/forms: Pre-stacked at factory (e.g., 2-ply: color-forming top, color-receiving bottom); write or use dot-matrix printers directly.
3 main reasons:
① Insufficient pressure (light writing/printer pressure → incomplete microcapsule rupture).
② Uneven coating (poor-quality paper → uneven dye/developer distribution).
③ Improper storage (high temp >35℃/humidity >80% → deactivated microcapsules/developers).
Under normal conditions (15-30℃, 40%-60% humidity), text stays stable for 3-5 years. High temp/humidity/strong light may cause fading; store important docs in sealed cabinets.
No, match printer type:
① Compatible with dot-matrix (sufficient pressure for NCR pads/sheets) and roll printers (for carbonless rolls).
② Inkjet/laser printers only print single sheets, no copying (insufficient pressure).
Mainly for distinguishing ply purposes (e.g., white for customers, pink for retention). Same coating formula for all colors (no effect on copying); custom colors (e.g., light green for medical use) available.
Ordinary BPA-free carbonless paper is "recyclable waste". Medical-scene waste (with medical contamination) follows medical waste rules. Prioritize paper meeting EU REACH/US FDA standards for better
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