Generally, coated paper is used for certificates, but there are exceptions. For example:

1. The type of paper used for university diplomas is high-gloss coated paper, with a weight of about 150 grams to 200 grams. High-gloss coated paper is a high-grade printing paper made from base paper coated with white paint. It is mainly used for printing covers and illustrations of high-end books and periodicals, color pictures, various exquisite product advertisements, samples, product packaging, trademarks, etc.

2. There is no special paper required for the inner core of the certificate of honor. There are coated paper, offset paper and special paper. The four-color printing effect of coated paper is good; offset paper is generally distributed by the manufacturer; special paper is customized by the customer.

The difference between offset paper and coated paper

1. Offset paper

Offset paper is mainly used for flatbed printing machines or other printing machines to print higher-end color prints. For example, color pictorials, picture albums, promotional posters, color printed trademarks, and some high-end books, book covers, illustrations, etc. Offset paper is divided into special number, No. 1, No. 2 and No. 3 according to the pulp ratio. It has high strength and printability, and is divided into single-sided and double-sided, as well as super calendered and ordinary calendered. level.

Offset printing is a relatively high-end printing paper for books and periodicals. It has high requirements on contrast, stretch rate and surface strength. The acidity and alkalinity should also be close to neutral or weakly alkaline.

2. Coated paper

Coated paper is made by coating base paper with a layer of white slurry and then calendering it. The surface of the paper is smooth, the whiteness is high, the paper fibers are evenly distributed, the thickness is consistent, the elasticity is small, the elasticity is good, the water resistance is strong, and the ink absorption and reception are very good. Coated paper is mainly used for printing albums, covers, postcards, color trademarks and exquisite product samples.