what is nrc (no carbon required) papers

what is nrc (no carbon required) papers

It is a business forms paper uniquely coated to reproduce information on subsequent sheets when normal pressure of inscribing is applied without using carbon paper. It can be from handwritten, typewritten or machine printed pressure.

How does it work?

An image is created when two separate chemical compounds such as colorless dye capsules and dye coreactants, coated on the sheets, come into contact. These compounds are coated onto the sheets using Microencapsulation process. The transfer of image occurs only when the NCR paper is in the correct sequence (CB, CFB, CF).

What is CB, CFB and CF or Three Sheet System?

Top Sheet – Coated Back (CB)
Middle Sheet – Coated Front and Back (CFB)
Bottom Sheet – Coated Front (CF)
Any desired number of middle sheets can be used, depending on the number of copies needed and the constraint of the manufacturer’s image quality. The majority of producers can accommodate 5-6 copies without any problems
What is Self-Contained or SC?
A special type of NCR paper which has a unique coating creating a Self-Contained (SC) NCR paper. It is made with both capsules and receiver coating on the same side of a single sheet. Thus, any sheet of paper can be pressure-images and the SC sheet beneath will reproduce the image.

What is Self-Contained Coated Back or SCCB?

Self-Contained Coated Back (SCCB) NCR paper functions in the same way as SC but with an additional extra layer of capsules on the back releases reaction onto the next middle sheet or bottom sheet.

What are the recommended number of copies or ply?

When using standard NCR paper the following number of copies can be obtained:Dot-matrix Impact printers:  up to 6 copies
Handwriting:                        up to 5 copies
Typewriters:                        up to 7 copies
What are the storage and shelf life recommendations?
Shelf life of 2 years is assured, but storage duration can be greater, especially if forms are stored under ideal conditions with relative moisture of 40% to 45% and temperatures below 25o C. We recommend that carbonless papers not be exposed for long periods to certain vinyls, plastics, unapproved shrink wraps, label protection tapes, solvents, certain carbon papers, hand creams, skins oil or related ointments. Coated front surfaces may turn yellow with age.
How long is the image retention?
With proper storage and ideal room conditions, carbonless papers are expected to have retention image remaining legible for at least 15-25 years. Ideal conditions remain at relative humidity of 40% to 45% and with temperatures below 25o C.
Source: http://www.advancecomputerforms.com/ncr.html


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