T/NBWJ 02-2025 Watercolor Pens

Scope

Main technical content: In terms of technical requirements, the main content and basis for determination are as follows: a) Initial writing performance: The requirement is that the ink should flow normally within 100mm of the line, and it should be improved to within 50mm. b) Writing performance: The line marking distance is increased from 100mm to 200mm to better meet consumers' needs. c) Drying time: In the QB/T 2777 "Markers" standard, the drying time requirement is ≤1 minute. However, considering the actual usage process of consumers, one minute is too long for drying, so the standard is raised to no more than 30 seconds. d) Water-soluble: A new water-soluble item is added. Currently, children's watercolor pens are prone to staining clothes during use, so adding this item meets consumers' practical needs. e) Phthalic esters and polycyclic aromatic hydrocarbons: Considering that children may put watercolor pens in their mouths and chew on them during use, these two indicators are added. f) Cap safety: In GB 21027, the minimum airflow of watercolor pen caps is 8L/min. Considering the actual production process capability, the standard is raised to 9L/min to ensure the safety of watercolor pen caps. g) End cap safety: Considering that the end caps of watercolor pens can be detached, there is also a risk of suffocation. Therefore, this standard borrows from British standards and adds an end cap safety item.

Development Information

Related Standards