Clariant describes the material as having two to three times greater color strength in polyethylene and PVC as conventional lead chromate
yellows, and adds that in combinations with inorganic pigments H4G achieves a close match to the color and opacity of lead chromates
As with the nonvinyl toys, leaded vintage PVC toys may contain the pigment lead chromate
This process forms particles with a core made of lead chromate
sulfate and a shell of lead sulfate.
Table 1: Coil coating sample formulations Sample Color Pigment weight (%) Overall PVC CPVC CY Yellow Lead chromate
Zinc chromate and lead chromate
are the predominate chromium compounds used in pigments but insoluble barium and strontium chromate can also be used.
Two samples were painted with paint containing lead chromate
Color pigments include high-value Synergy pigments designed to reduce costs for formulators of industrial coatings; Meteor and Meteor Plus complex inorganic pigments for applications requiring heat resistance and exterior durability; Engeltone organic pigments in a wide spectrum of colors; Engeltone low-soluble cadmium pigments for uses requiring good heat and light stability; and Engeltone lead chromate
and moly orange pigments for cost-effective coloring.
However, in actual practice, other nonpermitted synthetic dyes like auramine, metanil yellow, lead chromate
, rhodamine, sudan-3 and 4, orange-2 and Malachite green, which pose serious health hazards, as they are mutagenic and potential carcinogens, are being used as food colours in the market.
In the paint and coating industry, federal regulations strictly limit the use of lead chromate
pigments--which give traffic markings their distinctive yellow color--to industrial products like traffic paints, finishes for machinery, and equipment and metal primers, says, Steve Sides, vice president of environmental health and international affairs for the National Paint and Coatings Association, a Washington, D.
exposures and elevated blood lead levels in workers in the blood lead levels in workers in the plastics pigmenting industry--Texas, 1990.
34) and the lead chromate
molybdate sulphate red (PR.
producers in Europe like Cappelle and BASF are switching completely to substitutes like bismuth vanadate pigments.
The revision takes account of the reduced risk from powders as high toxicity ingredients such as triglycidal isocyanurate (TGIC) cross-linkers and lead chromate
pigments have now largely been removed from UK manufactured products.
They are used for the formulation of paints and coatings as an inorganic alternative to pigments containing lead chromate
Clariant's pigment ranges have been manufactured without lead chromate
for a long time.