Copy paper

1. Name concept:

Printing paper refers to a kind of paper used to print and copy documents. Specifications are A0, A1, A2, B1, B2, A4, A5, etc.

Copy paper is one of the most consumed materials in electrostatic copiers. Common models B5, A4, B4, A3, 16K, 8K, etc.

2. Shape:

Copy paper is copy paper; Printing paper refers to the kind with holes on both sides and stacked one by one. Some can be torn off. We call it tearing edge.

3. Color:

The copy paper is generally white; The printing paper can be divided into white and color.

4. Purpose:

Printing paper is generally used to print bills and reports; Copy paper is mainly used for document copying and printing, such as copying ID card, copying documents, etc.

The format size specified by the state is an international standard series, which has been determined into the national industry standard GB / T 1999 and implemented throughout the country. The current size of books and periodicals is mainly a series specifications, including the following:

A4（16k）297mm × 210mm；

A5（32k）210mm ×   148mm；

A6（64k）144mm × 105mm；

A3（8k）420mm × 297mm；

Note: the A3 (8K) size has not been set, but it is widely used. The international common A4 (210 * 297mm) paper is used for printing and copying, but the United States and some countries use abnormal A4 paper: 216 * 279mm, commonly known as American Standard and American Standard.

Purchase points of printing paper:

1. Thickness of paper

The thickness of paper is usually expressed in grams per square meter. The thickness specification of common printing paper and copy paper is 70 ~ 80 grams / square meter.

2. Density of paper

The density of paper refers to the degree of density and thickness of paper fibers. If the fiber of the paper is too sparse and too thick (i.e. density difference), when using the inkjet printer, the reverse side will be soaked, the printing effect will be poor, and it is easy to produce paper wool and paper scraps, which will damage the printer.

3. Stiffness of paper

The stiffness of paper refers to the firmness of the texture of paper. If the stiffness is poor, it is easy to encounter a little resistance in the paper conveying channel, and the paper will wrinkle and even block, so the printing paper with good stiffness should be selected.

4. Surface luminosity of paper

The surface luminosity of paper refers to the brightness of the paper surface. The paper color should be white, not gray. The brightness need not be too high. Too high brightness is bad for image fixing.

5. Dryness of paper

If the dryness of the printing paper is low and the water content is large, the insulation performance of the paper will be reduced, which will affect the printing effect. The bottom ash is large, and the paper jam will easily occur. Therefore, the printing paper with high dryness should be selected. On the other hand, the paper should be kept moisture-proof and stored in a dry and ventilated place.