Special office printing paper is classified according to the size and number of layers, such as 241-1, 241-2, they represent one layer and two layers of narrow-line printing paper, of course, there are three layers and four layers; commonly used wide-line printing paper there are 381-1, 381-2 and so on. For example, 241-2 refers to carbon free printing paper (also known as pressure sensitive paper). It can only be printed on a stylus printer. 241 stands for 9.5 inches, or the width of the paper, which is also called 80 rows of printing paper, that is, normal fonts, 80 words in a row. The main uses of these papers are: out / out, statements and receipts. Apply to: Bank hospitals and so on.

Carbon free printing paper, also known as pressure-sensitive printing paper, consists of upper paper (CB), medium paper (CFB) and lower paper (CF). It is based on the principle of chemical reaction between microcapsule chromogenic agent and acidic clay in chromogenic agent layer. When printing, the color effect is achieved by pressing the paper surface with a printing needle. The common and common color layers are 2 to 6 layers.

Carbon-free printing paper should be purchased with care to observe whether the outer packaging of the paper is damaged (if the outer packaging is damaged or deformed, it may lead to the color of the paper inside). B: Open the outer package to check if the package inside is certified, the paper is damp, wrinkled, and the color rendering meets the requirements you want (usually tearing off a copy and writing a few words on it in the normal way, and then looking at the color rendering on the last layer). C: Make sure the paper is your own size. Need to avoid unnecessary waste and trouble.

Commonly used non-carbon printing paper specifications are 80 or 132 columns, there are special specifications (width, length, horizontal, vertical, etc.). The most commonly used is 80 rows, the size is: 9.5 inches X11 inches (with holes on each side, 22 holes on each side, the hole spacing between each two holes is 0.5 inches) about 241 millimeters X279 millimeters. The 80 row of paper is usually divided into three specifications.

1: full page (9.5 inches X11 inches).

2: two points one (9.5 inches X11/2 inches).

3: three points one (9.5 inches X11/3 inches).

After unloading, attention should be paid to, if not for a long time, should be put into the original packaging plastic bags, moisture-proof, anti-damage, etc., if carbon-free duplicate printing paper need to pay attention not to be subjected to sharp objects or external force extrusion, in order to avoid causing color, affect the use. Before using the product, we should confirm the printer's gear position. When multi-layer printing, we should try not to use high-speed printing to ensure the clarity of the printed handwriting. Documents should be kept separately. If they must be kept together, extrusion should be avoided. It should avoid light, water, oil, acid and alkali. Carbon copy paper can be kept for at least 15 years in a suitable environment. If paper jam occurs in the printing process to check whether the position of the printing paper is appropriate, whether it is aligned with the tower, whether the printing head has selected a suitable position for the number of paper layers.

Note printer or horizontal push printer and so on are most suitable for using multi carbon free printing paper products. These printers are designed so that the printing paper does not bend in the machine, the printing paper is flat, and the printing force is larger.

How to solve the problem that carbon paper is not color or color is not clear?

No color may be caused by the reverse loading of the printed paper.

The reason of unclear color may be due to insufficient pressure on the printer or broken needle in the printer's hair. It can increase the printing intensity and check whether there is broken needle.

Color development is a chemical process, greatly affected by environmental temperature, especially in winter when the temperature is low, the chemical reaction activity is slow, can not be seen immediately after printing, this is a normal phenomenon.