Specification, classification and storage of album printing paper

Specification, classification and storage of album printing paper

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In addition to an understanding of the relationship between the production of paper and the quality of raw materials and paper used in a printed book, a printer of a book printing, leaflet printing, or book printing must understand the specifications, classification, storage, etc. of the book printing paper. It is convenient to use all kinds of printing papers correctly and reasonably in the work, so that it can be targeted. Take the book printing paper as an example:

1. Specifications of the book printing paper

The specifications of the book printing paper As the paper used in our country, in the past most of them depended on the imported product, the specifications were disordered and not consistent with each other. This created great obstacles to the utilization of paper in the development of China's paper industry and the book printing industry. After the liberation, under the leadership of the party, this situation has gradually been reversed. For certain printed papers, due to special needs or because of the habit of using them, non-standard specifications are still used, and the remaining album printing papers have a unified standard.

2. The type of book printing paper

The type of album printing paper can be divided into two kinds of flat paper and web. The printing industry mainly prints on flat sheets, but on high-speed rotations of books and newspapers, it is printed on webs.

3. Size of album printing paper

There are many kinds of flat paper, but the size has generally been specified as 787 mm x 1092 mm and 850 mm x 1168 mm. There are other special sizes. For example, listed in Table 1-3:

Paper size (mmxmm)

Typing paper 787X1092, 560X780

Written paper 690X960, 787X1092

Drawing Paper 690X960, 787X1092, 427x596, 308x427

Wax Paper 508X762

The size of the web, regardless of width and length, is based on its use. For example below

                              Paper Width (mmxmm)                   Paper Length (mmxmm)

Newsprint                      1575, 1092, 787                                 6000

Letterpress paper          1575, 1092, 787                                 6000

Drawing paper                  1172,834,596                                   20

Cement sack paper               1020                                           4000

Cigarette paper                    29,29.5                                         4000

4. The weight of the book printing paper

The weight of the printed book paper is expressed in terms of weight and weight, and is usually expressed quantitatively in production.

Quantitative, also known as grammage, is the weight of paper per square meter. The standard stipulates that it should be expressed in grams. The general writing is g/m2 (g is gram, m2 is square meter). Quantification is a sign indicating the thickness of the paper. The larger the quantification, the thicker the paper. For example, commonly used album printing paper has 50g/square meter, 60g/square meter, 70g/square meter, 80g/square meter, 100g/square meter....etc. Those weighing less than 260 g/m2 are called paper, and those exceeding 250 g/m2 are called paperboard.

The order weight refers to the total weight of each ream (500 sheets), which should be calculated based on the paper size and basis weight, so that the kilogram is reused. Calculated as follows:

Ream weight (kg) = paper area (square meter) X500 (sheet) x basis weight (g/m2) *100