Carbonless paper, also known as NCR paper, Non carbon copy paper, self copy paper, auto copy paper etc, is a kind of paper coated by Microcapsule and/or color Developer. It including CB, CFB & CF.
CB (coated back): The back of the base paper was coated with microcapsule.
CFB (coated front & back): The base paper was coated with color developer on front and microcapsule on back.
CF (coated back): The front of the base paper was coated with color developer on front.
Normally, in a multiple ply NCR documents, the top sheet is CB and bottom sheet is CF, all the other sheets between is CFB.
TECHNICAL DATA
CARBONLESS PAPER TECHNOLOGY SPECIFICATION TEST REPORT
| Grades | Blue/Black Image |
| Regular basis weight (gsm) | CB white: 55 CFB colored: 50 CF colored: 55 |
| Basis weight variation | ±5% |
| Caliper Variation (CD) | ≤5μm for 50GSM or less GSM ≤7µm for 50GSM or greater GSM |
| Paper Density | 0.70-0.85 g/cm3 |
| Opacity | ≥65% |
| Smoothness (CF side) | ≥80s |
| Whiteness | ≥90% |
| Thickness | 65μm CB 60μm CFB 65μm CF |
| Chromatic deviation | ≤2.0% (coated side for tinted grades) |
| Curls | ≤12 mm |
| Imaging Sensitivity (6 ply prints) | ΔE≥40% ΔD≥40% |
| Surface strength (medium viscosity printing ink) | ≥0.55 m/s (printing side) |
| Light resistance (residual ΔE after 144 hrs) | ≥50% |
| Friction resistance (Δ E) | ≤5% |
| TSI (MD) | ≥60 N.m/g |
| Surface PH | 6.0-9.0 |
| Moisture on delivery | 6.5% ± 2.0% |
HOW CARBONLESS PAPER WORKS?
When writing on the top of multiple ply NCR documents, the pressure from the writing instrument causes the microcapsules (on the back of CB & CFB) break, the contains will react with the developer (on the front of CFB & CF) and finally realize auto copy.
APPLICATION
Carbonless paper is widely used in multiple ply documents such as banking note, ways bills, commercial invoices, stock list, order list, courier way bill, air/ocean way bill, commercial book, pos roll etc.
