What types of paper are there?

Cultural paper

Paper used for taking notes or printing for cultural purposes. Coated paper, Dowling paper, molded paper, certificate paper, printing paper, drawing paper, poster paper, typing paper, Bible paper, postal seal paper, cigarette paper, glassine paper, newsprint, etc.

1. Printing and writing coated paper

The surface of the paper is mixed with clay, calcium carbonate, or other pigments such as titanium dioxide, plastic pigments, etc., and adhesives to improve the color and gloss. degree and printability. The grades of coated processed paper that are coated with paint on the surface of the base paper and then calendered can be divided into the following categories:

(1) Super coated paper: the highest grade coated paper that has been coated two to three times. Paper, the total coating amount per side is more than 25g/m2, the gloss is more than 80 degrees, the paper surface is extremely fine and smooth, the print is very clear and bright, suitable for high-end picture albums, high unit price product catalogs, important documents and other quality Printing materials with extremely high requirements.

(2) Premium coated paper: According to the general classification standards of the Japanese paper industry, high-grade coated paper with a coating amount of about 20g/m2 on each side has a smooth and delicate paper surface and excellent printability. It is divided into single-sided and double-sided. The coating amount on one (each) side is more than 20 grams/square meter and is super-calendered. It is called art coated paper. For color printing.

(3) Coated paper: It is divided into single-sided and double-sided coated paper. According to the Japanese Paper Industry Classification Standard, the coating amount on each side is about 10g/m2 or more. It is super-calendered. cloth paper. For color printing. It is one of the most commonly used paper types in cultural publishing, advertising design, printing and binding, and industrial and commercial circles.

(4) Lightweight coated paper: According to the Japanese paper industry classification standard, the coating amount on each side is about 6 to 10 grams/square meter, without over-calendering, or slightly over-calendering , basis weight is about 50-75 grams/square meter, used for magazine printing.

(5) Blunt coated paper: Coated paper coated with powder and calendered, with a glossiness of about 20 to 40 and high printing gloss, such as the special snow-coated paper produced by our company.

(6) Snow-coated coated paper: Powder-coated calendered coated paper with a glossiness below 20 degrees. The paper is soft, non-reflective and does not harm eyesight.

(7) Micro-coated paper: It is coated with pigments and calendered to improve the uniformity and smoothness of the paper surface, and improve the ink holding capacity of the paper. The coating amount per side is more than 4 grams/square meter. Without over-calendering, the basis weight is about 35-80 grams/square meter. It is used for magazine printing.

(8) Marking paper: printing paper that is coated and processed directly on the paper machine. It is suitable for color, color registration, and monochrome printing.

(9) Magazine paper: Lightly coated and calendered printing paper is the most commonly used paper type in magazines.

2. Uncoated paper for printing and writing

1. Special grade (Daoling paper): made of fully chemical wood pulp, with a whiteness of more than 80%, used for writing and printing. (Some countries currently allow BCTMP to contain less than 10%) Printing and writing paper made from chemical pulp is one of the most commonly used types of paper for cultural publishing and printing and binding. Adding dyes gives different paper colors, such as blue White Dowling paper and beige Dowling paper.

2. Grade A (moulded paper): Made entirely of chemical pulp, with a whiteness of more than 78%, used for writing and printing. Printing and writing paper made from chemical pulp and some mechanical pulp. The paper quality is slightly worse than Dowling paper. It is slightly yellow in color, has good elasticity, strong tensile strength and is cheap. It is widely used.

3. Grade B (printing paper): more than 70% chemical pulp, the rest is mechanical pulp, with a whiteness of more than 72%, for printing.

4. Grade C (printing paper): more than 40% chemical pulp, the rest is mechanical pulp, with a whiteness of more than 65%, for printing.

5. Colored printing paper: dyed paper for printing purposes.

4. Laminated paper

Belongs to the Dowling paper category, which has strong toughness and a rough surface to enhance the penetration and adhesion of the laminate, making it waterproof and moisture-proof.

5. Printing paper

Mold-made paper specially used for printing books. Due to eye protection, the paper is mostly light beige, and its characteristics are roughly the same as general mold-made paper.

6. Drawing paper

Mainly made of 100% chemical pulp, with appropriate opacity, surface smoothness of less than 10 seconds, and grade A whiteness of more than 80%. More than 65% of Grade B, with a basis weight of about 70 to 200 grams per square meter, is used for drawing and painting. The paper is slightly milky in color, does not hurt the eyesight, has strong durability, is resistant to wiping, is lint-free, and has strong water absorption and color development power.

7. Securities paper

High-end writing paper that is durable and durable and can be used for securities, high-end documents and letters.

8. Posters/single-gloss paper

One side of the paper is smooth and the other side is rough. Most of them are made of chemical pulp, white or dyed in various colors. The basis weight is about 25-100 grams/square meter, and it is used for printing calendars, advertisements, flags and other purposes. Thin-pound single-gloss paper, suitable for posters, slogans, calendars, and ten-line paper.

9. Typing paper

Made of chemical pulp, with a basis weight of about 28 to 35 grams per square meter. It is used for typing, copying, and writing. High-grade thin paper for typing and copying, suitable for reports, subpoenas and stationery.

10. Bible paper

Made of fiber pulp with high paper strength such as wood pulp, linen, and cotton, with a basis weight of about 20 to 30 grams/square meter and high opacity. . For printing dictionaries and Bibles. Containing a large amount of titanium dioxide filler, the paper is light and highly opaque, and is specially used for printing Bibles, dictionaries or aviation expresses.

11. Postal seal paper

Single gloss paper with a basis weight of about 20 grams/square meter, made of all wood pulp, with strong paper strength and 75% whiteness The above is used for document copying. It is also made from waste paper and used for writing, packaging, and padding. Single-sided glossy paper used for copying documents and packaging stamps. The paper is extremely strong and has a strong luster on one side.

12. Cigarette paper

Made of flax fiber pulp, with a basis weight of about 20-24.5 grams/square meter, mainly using light calcium carbonate as filler, and adding sodium nitrate Adjust its burning rate to achieve flame retardant effect. Exclusively for cigarettes. Nowadays, there are fully bleached wood pulps that can also meet the requirements of paper products. Containing a large amount of calcium carbonate filler, the calcium carbonate decomposes into carbon dioxide when the paper is burned, which provides a buffering effect and prevents the paper from burning too fast.

13. Glassine paper

It is made of chemical wood pulp, highly refined, and then super-pressed into translucent paper. The basis weight is about 25~ 65 grams / square meter, there are also 147 grams. For tracing, food packaging and lining paper. Paper that has been highly beaten and treated with a strong pressure calender is used in packaging, photo albums, stamp albums, etc.

14. Newsprint

Made from waste paper pulp, mechanical pulp or a mixture of the two, without glue, the basis weight is about 42 to 52 grams/square meter, and light Calendered paper used for printing newspapers and magazines. The main raw material is groundwood pulp, the whiteness is required to be above 55% GE, and it needs to have appropriate oil permeability.

15. Phone book paper

Made from a mixture of waste paper, bleached mechanical wood pulp and chemical pulp, the paper has a basis weight of about 38 grams/square meter. Or add light dye for printing phone books.