Is the watercolor pen poisonous?

Generally, the maximum movable elements of watercolor pen products are within the safe range. The maximum limit requirement of the migratable elements in products refers to the limit of the content of heavy metal elements harmful to human body in colored pens and marker pens, and the migratable elements involved are eight heavy metal elements such as antimony, arsenic, barium, cadmium, chromium, lead, mercury and selenium.

In the third quarter of 2008, Shanghai Bureau of Quality and Technical Supervision conducted a special supervision and spot check on the quality of colored fountain pens and marker pens produced and sold in Shanghai. 44 batches of products were randomly selected, and 40 batches passed the inspection, and the pass rate of physical quality sampling was 90.9%.

Advantages:

The advantages of colored fountain pens are rich colors and bright colors, but the disadvantages are short time, uneven moisture, unnatural transition, and disharmony between the two colors, which is generally suitable for drawing children's paintings.

Some marker boxes can also be divided into several vertical watercolor grooves, and each groove is filled with different watercolors, so that the marker can write different colors of calligraphy and painting or draw different patterns at one time, and the colors can be adjusted at will. A pen can write a large font or draw a large area of painting and calligraphy at a time, with rich color changes, which is more suitable for painting and calligraphy creation, improves the painting effect, and is conducive to improving students' learning interest and painting and calligraphy level.