A.p. or ap
Abbreviation for artist's proof. AP can also stand for "Approved Product," meaning non-toxic, when seen in the "AP seal" placed on manufactured art materials by the Art & Creative Materials Institute (ACMI).Products bearing the AP Approved Products Seal are "certified by ACMI to contain no materials in sufficient quantities to be toxic or injurious to humans or to cause chronic or acute health problems. These products are safe to use in the classroom, even with young children." The satement "Confroms to ASTM D-4236" indicates that the product conforms to the labeling standards of the Hazardous Art Materials Act. If the product is non-toxic, then no warning needs to be included on the label. "However, if the product is found to carry acute or chronic health hazards, the information on the label must alert the consumer to those hazards."Also see ASTM International (American Society for Testing and Materials), CL, hazardous, Material Safety Data Sheet (MSDS), poison, safety, science and art, seal, and toxic.