Although the summer vacation season has just arrived, have anxious parents already begun to prepare for the next semester? You need to be careful when choosing all kinds of books for children. These books will be in close contact with children for a period of time. If the quality

Although the summer vacation season has just arrived, have anxious parents already begun to prepare for the next semester? You need to be careful when choosing all kinds of books for children. These books will be in close contact with children for a period of time. If the quality does not meet the hygienic requirements, it will affect the children's physical and mental health, especially their visual health.

The various types of books mentioned here include textbooks, teaching aids (synchronous exercises that accompany textbooks, winter and summer vacation homework, exercises and other publications), study magazines, homework books (workbooks), test papers, newspapers, picture books, etc. Learning books for preschoolers, these are commonly used books.

What kind of books meet the health requirements of myopia prevention and control ?

The national mandatory standard "Hygienic Requirements for Myopia Prevention and Control of School Supplies for Children and Adolescents" (GB 40070-2021), which will be implemented on March 1, 2022, puts forward clear regulations on the hygiene requirements related to myopia prevention and control of books used for learning.

Paper should meet the following requirements

1 The weight of the paper should not be too low

It can be touched by hand and should not be too thin or light. Different types of books have different requirements for the grammage (mass of paper per unit area) of the inner pages. Simply put, the grammage of the paper required for color printing is higher. Whether

meets the standards needs to be determined by testing by professional institutions. You can also have a general understanding so that you have a "number" in mind.

The weight of the inner pages of the exercise book and the paper for the test paper should be ≥65.0g/m2. The basis weight of the inner pages of color printed books for textbooks, teaching aids, and preschool children's books should be ≥70.0g/m2, and the basis weight of the inner pages of single-color or two-color printed books should be ≥60.0g/m2.

2 The whiter and brighter the paper, the better.

Although the higher the whiteness of the paper, the printed colored graphics and texts will be more vivid, but the higher the whiteness of the paper, the stronger the reflected light, and the more harmful it is to human vision. Books for primary and secondary school students are mostly black text that imparts knowledge. The contrast between black and white is strong, and long-term use can cause visual fatigue. The

standard has specific requirements for the brightness of study book paper. We should pay attention to the distinction when choosing. The paper color should be soft milky white, or slightly yellowish paper can be used, as long as the brightness requirements are met.

3 Paper smoothness must meet the standard

If the smoothness is too low, it may lead to poor printing quality. However, from the perspective of myopia prevention and control, smoother is not always better. You can touch the paper with your hands and it will be enough if it is not too rough.

Printing quality must pass

Printing quality can be judged by objective indicators, such as printing solid density, overprint error, etc. But for the general public, these professional indicators are complicated and difficult to understand. Therefore, you can simply flip through the book to ensure that the pattern and text are clear and complete, and there are no obvious stains on the layout; the ink color is uniform and consistent in depth, there are no blurred words that affect recognition, and there are no obvious watermarks; the grid lines in the exercise book are clear, with no ghosting or broken lines .

Use words correctly

Different types of books used by different grades have different rules for the use of words, as well as the horizontal lines and square sizes of books. Generally speaking, books used at lower grades should have larger font sizes and larger line spaces. As the grade level increases, the font gradually transitions from regular script to Songti .

can refer to the table below for details. Patient and meticulous parents can also take a rough measurement with a ruler, especially picture books and reading materials for preschool children, which should be paid attention to.

Wording requirements for different grades and different types of books

Note: The words used in auxiliary texts such as tables of contents and notes can be appropriately reduced according to the wording used in the main text, but it should be no less than 10.5P (size 5) in preschool and primary school, and no less than 10.5P (size 5) in junior middle school and primary school. High school should not be smaller than 9P (5 sizes small).

Dimensions and specifications of inner core lines in primary school textbooks

Finally, parents are reminded: For the visual health of children and adolescents, in addition to reminding children to use their eyes properly, parents must keep their eyes open and buy books from regular stores and regular channels.

Information: Shanghai Disease Control and Prevention

Editor: Yu Luoyin