T/NBWJ 02-2019 watercolor pen

Scope

Main technical content: In terms of technical requirements, the main content and determination basis are as follows: a) Initial writing performance: The standard requires that the ink flow within 100mm be normal, and it is upgraded to requiring normal ink flow within 50mm. b) Writing performance: The standard is raised from requiring a line width of 100mm to 200mm, better meeting consumers' needs. c) Drying time: In the QB/T 2777-2015 "Markers" standard, the drying time requirement is ≤1 minute. Considering the actual usage process of consumers, a 1-minute drying time is too long, so this standard is upgraded to a drying time of 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' actual needs. e) Phthalates 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 21027-2007, the minimum airflow of watercolor pen caps is 8L/min. Considering the actual production process capability, this standard raises the requirement to 9L/min to ensure the safety of watercolor pen caps. g) End cap safety: Considering that watercolor pen end caps can be removed, 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