MASSTONE COLOR

Within the limitations of printing technology, we choose inks as close as possible to the actual color inside the tube. In the case of intensely pigmented colors, or watercolors which are diluted for use, we choose inks that emulate thc color as it is normally used. For example, Prussian Blue appears almost black when squeezed from the tube, so we chose an ink color for the label which simulates the color at a traditional dilution.

ASTM and ACMI

ASTM (The American Society for Testing and Materials) is an association of industry representatives and other interested people who formulate voluntary standards for quality and safety; ASTM D4236 is the name of the standard for health and safety labeling effort materials.

This standard was made mandatory by the Federal Labeling of Hazardous Art Materials Act (LHAMA) of 1990 It requires manufacturers to have their products evaluated by a toxicologist for their ability to cause chronic illness, and to follow his or her labeling recommendations. The statement "Conforms to ASTM D4236" is your assurance that the product is properly labeled for health hazards.

Other ASTM standards, such as D4302 for Artist' Oil Paints, are concerned with quality and the standardization of terminology for ingredients.Where a standard exists and Grumbacher products conform, a statement to that effect is included in our labels. In the case of MAX GRUMBACHER Colors, a standard does not yet exist for the category.

Grumbacher is a member of The Art and Craft Materials Institute (ACMI), and participates in their certification program. ACMI's toxicologist regularly reviews our products and provides labeling recommendations in accordance with LHAMA. The following ACMI seals show that Grumbacher products are properly labeled under federal law.

Proposition 65 and Safe Studio Practices