china lithopone pigment b301

...

In the meantime, the chemical factories of Continental Europe, principally in Germany, Austria and Belgium, had taken hold of the novelty and under the collective name of lithopone or lithophone, by numerous processes, produced various grades of the pigment, branding the respective qualities as red seal, green seal, yellow seal, blue seal, etc., or selling them under some fancy name. Of this we shall speak later on. The crusade against the use of white lead in the various countries of Continental Europe, assisted the manufacturers, to a very great extent, in marketing their products, not only to industrial concerns, as has been the case in this country, until recently, but to the general painting trade. Up to 1889 the imports into this country were comparatively small. At that time one of the largest concerns manufacturing oilcloth and linoleum in the State of New Jersey began to import and use Charlton white. Shortly after that other oilcloth manufacturers followed suit, replacing zinc white with lithopone in the making of white tablecloth, etc., and later on abandoning the use of white lead in floor cloth and linoleum. This gave an impetus to several chemical concerns, that erected plants and began to manufacture the pigment. Competition among the manufacturers and the activity of the importers induced other industries to experiment with lithopone, and the shade cloth makers, who formerly used white lead chiefly, are now among the largest consumers. Makers of India rubber goods, implement makers and paint manufacturers are also consumers of great quantities, and the demand is very much on the increase, as the nature of the pigment is becoming better understood and its defects brought under control. Large quantities find their way into floor paints, machinery paints, implement paints and enamel paints, while the flat wall paints that have of late come into such extensive use owe their existence to the use of lithopone in their makeup.

...

Washed with ethanol nZnS-BaS0 4 crystalline cake, washing the filter cake drying cabinet at 105 ° C after drying lh pulverized by atomic absorption detection zinc, barium yield, in order to reach 98.4% based on zinc, barium meter 99%, ZnS mass fraction accounted for 36.6%. The total mass fraction of zinc sulfide and barium sulfate reached 99.22%, and the mass fraction of ZnS accounted for 36.6%. The particle size of barium sulfide is larger than that of zinc sulfide, which is 77 nm and 38 calendars respectively. The indicators of tinting strength and oil absorption exceed the GB/T1707-1995 B311 type.

...

2. Plastics Lithopone is an ideal pigment for plastic products, as it provides excellent color retention, heat stability, and UV resistance. It is commonly used in the production of PVC pipes, bottles, and packaging materials It is commonly used in the production of PVC pipes, bottles, and packaging materials It is commonly used in the production of PVC pipes, bottles, and packaging materials It is commonly used in the production of PVC pipes, bottles, and packaging materialslithopone 28 b301 30 b311 manufacturers.

...

At the present JECFA meeting, the committee considered additional toxicological studies relevant to the safety assessment of the chemical that investigated its toxicokinetics, acute toxicity, short-term toxicity, long-term toxicity and carcinogenicity, genotoxicity, and reproductive and developmental toxicity, as well as special studies addressing its short-term initiation/promotion potential for colon cancer. The experts acknowledged that a large number of toxicological studies have been conducted using test materials, including nanoparticles, having size distributions and physico-chemical properties not comparable to real-world uses of titanium dioxide as a food additive. The studies on non-representative materials were evaluated by JECFA, but the committee concluded that such studies are not relevant to the safety assessment of the additive.

...