Cadmio y Cobalto en los colores vallejo
Proposition 65 caused great concern to the manufacturers of colors for artists. Some manufactures developed lines which do not contain the listed pigments. Vallejo introduced Acrylic Studio, a line of artists colors which does not contain either Cadmium or Cobalt pigment. Model Air, color line formulated for airbrushing, do not contain Cadmium or Cobalt.
However, further studies did not lead to a complete elimination of these pigments in artists’ colors or other industrial applications. The thermal and chemical stability of Cadmium is far superior to other pigments of similar hue. And in recent years, the manufacturing process of cadmium pigments has been much improved. Although soluble cadmium compounds and fumes are toxic, the pigments themselves have become practically insoluble and are now considered safe when used within the strictly regulated limits now applied. Of maximum importance is the solubility of the pigment, and only those pigments with a low solubility are employed , in accordance with the USA TCLP (Toxicity Characteristic Leaching Procedure), a ruling which states that the maximum amount of soluble Cadmium in pigments should be 1ppm. The level of solubility of the pigments is further controlled in order to comply with the Council of Europe Resolution AP(89)1 Food Contact Limits, USA TCLP Waste Leaching Limits, Safety of Toys Directive 88/378/EEC (EN 71): Part 3 related to the coating of toys and EPA SW 846 Federal Regulation Vol.55 No.61 conforming to TCLP. See also Cadmium Regulations Update.
Acrylic Artist Color, Acrylic Gouache
The Cadmium pigments in these lines are insoluble compounds of Cadmium Calcinated Zinc Sulphide and Cadmium Sulphoselenide, supplied by Rockwood Pigments, which are considered non-hazardous in compliance with the C.H.I.P. (Chemicals Hazard Information and Presentation for Supply Regulations). Pigment content is listed on each label, in the colorcharts and on the attached Pigment Content-Index per product.
Model Color and Game Color
In Modelcolor and Game color , the object is not to bring out the quality of the pigment itself as in Artists’ Colors, but to use pigment for matching existing shades of uniforms, medieval or modern, weaponry, military vehicles of all kinds, and fantasy figures modern and ancient. Sometimes more than a dozen pigments are employed to achieve the most perfect match possible. In our colors for Models and Miniatures, Cadmium Calcinated Zinc Sulphide and Cadmium Sulphoselenide are present in some of the basic colors and in even lesser percentage in mixtures of the 300 plus shades. All are certified as ASTM D-4236.
This traditional pigment of great beauty is present in the Vallejo lines only in Acrylic Artist Color , in Cobalt Blue, Cerulean Blue, Cobalt Violet, and Cobalt Yellow (Aureoline). In the form of dry pigment, inhaled cobalt may cause allergies in the respiratory system, but in the formulation of acrylic binder they are considered safe. Cobalt pigments are not classified as hazardous for supply under the Chemical Hazard Information and Presentation for Supply Regulations 2002 (SI 1689) and related EU directives (67/548/EEC, adaptations & amendments).
Copper is found in the phtalocyanine pigments used in all artists colors (blues and greens). Historically copper was present in a soluble form in many pigments, but now it is employed in such complex compounds that they cannot be absorbed by the human body.