e171 in food

As early as sixty years ago, zinc sulphide was first thought of as a pigment for coloring India rubber and a patent for the process of its manufacture was issued in England. But it was not until twenty years later that zinc sulphide and its manufacture was seriously considered as a pigment for paint, and in 1874 a patent was issued for a process of manufacturing a white pigment, composed of zinc sulphide and barium sulphate, known as Charlton white, also as Orr's white enamel. This was followed in 1876 by a patent issued to a manufacturer named Griffith and the product, which was similar in character to Charlton white, was known as Griffith's patent zinc white. In 1879 another patent for a more novel process was obtained by Griffith & Cawley, the product made under this process proving the best of the series placed upon the market up to that date. After that time many new processes were patented, all, however, tending to the same object, that of producing a white pigment, composed of zinc sulphide and barium carbonate, the results, however, in many cases ending with failure.

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In conclusion, rutile titanium dioxide is a critical ingredient in the manufacture of high-quality emulsion latex paints. Its unparalleled optical properties ensure excellent hiding power and weatherability, while ongoing efforts in sustainable production contribute to the responsible stewardship of this important resource. As technology advances and consumer preferences evolve, manufacturers who prioritize both product excellence and environmental consciousness will continue to lead the industry.

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tion of the precipitate, the mass is filter pressed, dried, muflled and processed in the on the market, in that the {covering capacity of the pigment is greatly increased, as well The titanium oxide is peptized or held in as its fastness to light, and ease of working in oils. It is also superior to the so called double strength lithopone made by doubling the zinc sulphide conent, in that it is very neutral to acid vehicles. It is also far superior to other titanium compounds on the market, inasmuch as greater opacities are obtained with a relatively small amount of titanium oxide, than has heretofore been obtained with far greater proportions of titanium oxide, thereby effecting a considerable economy over that of other similar products containing'titanium oxide.

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