LHAMA entered into force in 1999, stipulates that those who sold in the US market, art materials must be assessed in accordance with the requirements of the chronic toxicity of the Act, these art materials including crayons, pencils, chalk, ink, glue, paint, canvas and other common stationery. Act in the assessment shall be accredited toxicologist American Toxicology Association (ABT) in. Manufacturer or seller shall be packaged ABT toxicology experts provide art materials art materials composition formula to analyze whether it will produce chronic adverse health ingredients. To perform LHAMA Act (LHAMA), the US Consumer Product Safety Commission (CPSC) on October 9, 1992 issue of the law will be enforced standards ASTMD4236 LHAMA approved for testing. For the definition of art materials, 13 February 1995, CPSC issued a legal document of art materials are defined: - The following LHAMA some products can not violate the rules. (1) can be used for general purposes and not necessarily only for the art pencils, pens, pen marks, chalk, etc; (2) the supporting tools and equipment used in artistic creation; (3) the surface of the material, such as dyed color book and canvas. However, if the material is defined as the art is not only dependent on the product itself, CPSC art materials when determining whether to consider a number of factors: including packaging, marketing and sales areas, such as ownership.