A kind of paper coated with acid developer on the front and microcapsule containing colorless hidden dye on the back. When the paper overlaps, the microcapsule breaks due to mechanical pressure, and colorless hidden dye overflows and reacts with acid to generate color, forming an image.This paper can be used for multiple overlapping, and is often used as a bill.
There are temperature sensitive chemicals on the paper, which will turn black after high temperature.When the pen tip passes the stroke, the friction force will produce high temperature instantly, which will make the place where the handwriting passes black.
If you bake directly with a lighter, you will find that the paper changes color instantly.
It is not suitable for archiving.
Pressure-sensitive paper
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(I)Pressure-sensitive paperIt refers to the paper that forms characters or patterns by exerting pressure on its surface. When the upper and lower layers bear certain external force, they will produce traces. It is generally used to print various billsbillEtc.
（2） One kind ofBase paperFor one or both sidesPressure sensitive coatingPaper produced by coating.Strong adhesion.High bonding strength and light resistance.Products are usually cut and rolled into narrow paper rolls.The formulation of pressure sensitive coating should be considered to preventPressure sensitive adhesiveHardening and viscosity loss.Base paper is usually unbleached or partially bleachedKraft wood pulpAnd has good affinity with pressure sensitive coating to obtain uniformcoatingSurface.Base paperSmoothness、Tensile strengthandTearing degreeBoth are high.The product can be used forpacking boxCan also be used to make various advertising paper pages andlabel。
Blue printing paper
There is blue dye on the back of the paper, which will be printed to the next page under pressure.
Carbonless copy paper
Carbon paper that does not require colored wax.Multi pageCarbonless copy paperWhen stacked together, multiple copies of documents can be copied by direct printing or pen writing.It is not only convenient and clean, but also can be made into a perforated blank computerPrinting paperTo realize efficient and continuous printing and replication.
The reason why carbonless copy paper can be copied without waxed copy paper is that it is coated with chemicals.
Carbonless copy paper is divided into upper paper, middle paper and lower paper.A certain medicine is coated on the lower side of the upper and middle pages, and another chemical is coated on the upper side of the middle and lower pages.When combined according to the order of the previous page, the middle page (can not be used or until there are 6 pages), and the next page, two different drugs will meet and show traces when they are impacted by the printing needle or the pen tip pressure, so as to achieve the purpose of copying.
The upper page is customarily called CB paper, and only the lower side is coated with CB medicine and called CB face;The next page is customarily called CF paper, and only the upper side is coated with CF drugs and called CF side;Medium sheet paper is usually called CFB paper. Its upper side is painted as CF side, and its lower side is painted as CB side.
Classification of carbonless copy paper products:
1. Carbonless copy paper is divided into five types: top paper (cb), middle paper (cfb), bottom paper (cf), single function self sensing paper (sc) and dual function self sensing paper (scb).
2. Carbonless copy paper is divided into blue printing paper, black printing paper or other color printing paper according to different color development.
3. Carbon free copy paper is divided into red, yellow, blue, green and white according to color.
4. Carbonless copy paper can be divided into Grade I, Grade II and Grade III according to the quality.
5. Carbonless copy paper is divided into ordinary type and light resistant type according to light fastness.
