\nT/WFSB 07-2021 The Four Treasures of the Study: Student-use Paper

Scope

Scope: This document specifies the classification and specifications, requirements, test methods, inspection rules, and marking, labeling, packaging, transportation, and storage of student-use paper for the "Four Treasures of the Study", and describes the corresponding test methods. This document applies to the design, production, inspection, and sales of calligraphy and painting paper products (hereinafter referred to as "paper") for primary and secondary school students in the nine-year compulsory education stage. Other students and groups may refer to this document for the use of calligraphy and painting paper products. Main technical content: The main technical content includes: classification, size specifications, and performance and safety requirements. 1. According to the purpose, it is divided into raw paper, cooked paper, and semi-cooked paper; according to the type, it is divided into original paper and patterned paper; 2. Requirements for the skew of original paper should not exceed 5mm, and the size deviations of three-foot-long paper, four-foot-long paper, three-opened four-foot-long paper, four-foot-long square paper, and four-foot-long paper, as well as the weight deviations of each batch of paper, are specified; 3. Requirements for the size specifications of checkerboard, nine-box grid, and square grid are set, and the overprinting error should not exceed 0.3mm; 4. Performance requirements include eight items: basis weight, compactness, brightness (whiteness), water absorption, dust content, fluorescent substances (wavelengths 254nm and 365nm), aluminum residue (dry sample, calculated as AL), and appearance requirements; 5. Safety requirements include three items: dangerous sharp edges, solvent residue, and maximum limits of migratable elements.

Development Information

Related Standards