In the third quarter of 2008, the Shanghai Municipal Bureau of Quality and Technical Supervision conducted special supervision and spot checks on the quality of colored pens and markers produced and sold in Shanghai. Of the 44 batches of products that were randomly inspected, 40 batches were qualified after inspection, and the pass rate of physical quality sampling was 90.9%.

Special supervision and spot checks, according to the national mandatory standard GB21027-2007 "General Requirements for the Safety of Student Supplies" and the registered corporate standards and product quality express guarantees, the maximum limit of the removable elements of the product and the safety indicators of the pen's cap Tested. The main problem found in the spot check is that the upper cap safety of the pens with 4 batches of products is unqualified.

The maximum limit requirements for the migration of elements in products refer to the limit on the content of heavy metal elements that are harmful to the human body in color pens and markers. The migration elements involved are antimony, arsenic, barium, cadmium, chromium, lead, mercury, selenium, etc Kind of heavy metal elements. In this spot check, the project is in good condition. The heavy metal elements of all products did not exceed the standard, and were significantly lower than the respective maximum limit in the standard.