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Sunday, May 3, 2020 | History

4 edition of coal-tar colors found in the catalog.

coal-tar colors

with especial reference to their injurious qualities and the restriction of their use

by Theodor Weyl

  • 277 Want to read
  • 23 Currently reading

Published by P. Blakiston in Philadelphia .
Written in English

    Subjects:
  • Coal-tar colors -- Physiological effect

  • Edition Notes

    Statementa sanitary and medico-legal investigation, by Theodore Weyl, with a preface by Professor Sell, tr. with permission of the author by Henry Leffman.
    ContributionsLeffman, Henry, 1847-
    Classifications
    LC ClassificationsQP971 .W5
    The Physical Object
    Paginationxii, 17-154 p.
    Number of Pages154
    ID Numbers
    Open LibraryOL6551815M
    LC Control Number12036347
    OCLC/WorldCa2578099

    If the fabric is colored, it may have taken up coal-tar colors, some foreign vegetable colors, and if a fruit product is being examined, some of the natural coloring matter of the fruit. Rinse the fabric in hot water, and then boil for 2 or 3 minutes in about one-third of a teacupful of water and 2 or 3 teaspoonfuls of household ammonia.   The ''one great joke'' told about William Perkin by his peers was that he did not ''discover the coal-tar colors by observing the iridescent film on tar distributing itself over the surface of a.

    Additional Physical Format: Print version: Hurst, George H. (George Henry). Dictionary of the coal tar colours. London: Heywood and Co., (OCoLC) Coal tar films provide very good corrosion protection. The dry film is damaged by direct exposure to sunlight, which causes rapid, severe cracking. Without expensive processing, most coal tar resins are very dark colored and the only colors that can be made from them are black or silver/black (made by using flake aluminum for pigment).

    Achieve maximum surface protection in severe industrial/marine environments with Rust-Oleum High Performance C System Coal Tar Epoxy. This high-solids, polyamide-converted epoxy includes refined coal tar pitch and forms an extremely durable coating. Protects against severe abrasion, strong chemicals and immersion in water (non-potable). Additional Physical Format: Print version: Perkin, William Henry, jr., On the aniline or coal-tar colours. London, W. Trounce, (OCoLC)


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Coal-tar colors by Theodor Weyl Download PDF EPUB FB2

The coal-tar colors with especial reference to their injurious qualities and the restriction of their use. This book The coal-tar colors: Theodor Weyl, Henry Leffmann: : BooksAuthor: Theodor Weyl. Coal-tar Colors: A Sanitary And Medico-legal Investigation Paperback – Aug by Theodor Weyl (Author)Author: Theodor Weyl.

Buy Coal-Tar Colors Used in Food Products (Classic Reprint) on FREE SHIPPING on qualified orders Coal-Tar Colors Used in Food Products (Classic Reprint): Bernhard Conrad Hesse: : Books.

The Use of Coal Tar Colors in Food Products (Classic Reprint) by Hugo Lieber (Author) ISBN Author: Hugo Lieber. This is a reproduction of a book published before This book may have occasional imperfections such as missing or blurred pages On the aniline or coal-tar colours/5(1). OCLC Number: Description: pages including tables, diagram 23 cm: Contents: Introduction: Purpose of coal-tar colors book investigation --Number of colors permitted --Quality and efficiency of colors permitted.

9 Identity of coal-tar colors used in food products in the United States in pp. 15 Purposes of food coloring. 23 Food color requirements. 25 Page - Pending further investigations now under way and the announcement coal-tar colors book, the coal-tar dyes hereinafter named, made specifically for use in foods, and which bear a guaranty from the manufacturer that they are free from subsidiary products and represent the actual substance the name of which they bear, may be used in foods.

In every case a certificate that the dye in question has been. Recent Progress in Coal-Tar Colors. Full text is unavailable for this digitized archive article.

Subscribers may view the full text of this article in its original form through TimesMachine. It is a brownish yellow powder, soluble in water producing a cherry red solution which has a greenish yellow fluorescence.

iO COAL TAR COLORS IN FOOD PRODUCTS. Phloxin produced by another manufacturer is the sodium salt of tetrabromtetrachlorfluorescein (C20 ^2 CI4 Br 4 O5 Na2).

Audio Books & Poetry Community Audio Computers, Technology and Science Music, Arts & Culture News & Public Affairs Non-English Audio Spirituality & Religion. Librivox Free Audiobook. Full text of "Coal-tar colors used in food products" See other formats. 6. Recommendations by associations and individuals as to use of coal-tar dyes as food colors.

42 7. Recommendations made by United States color industries and trades to the Department of Agriculture. 47 8. Investigations, other than on animals, bearing on the harmfulness of coal-tar colors. 51 9. texts All Books All Texts latest This Just In Smithsonian Libraries FEDLINK (US) Genealogy Lincoln Collection.

National Emergency Library. Top Coal-tar colors used in food products by Hesse, Bernhard Conrad. Publication date Topics Coal-tar colors Pages: Coal tar is among the by-products when coal is carbonized to make coke or gasified to make coal gas.

More Information These dyes are used in foods, over-the-counter and prescription drugs, textiles, cosmetics, and personal care products like hair dyes, shampoos, and deodorants. COAL-TAR COLORS USED IN FOOD PRODUCTS.

Coal-tar colors in general should therefore be permitted for the coloring of foods, but those that have been found to be harmful should be expressly and specifically forbidden. The amount of coloring matter which has been determined quantitatively in.

Recommendations by associations and individuals as to use of coal-tar dyes as food colors. Recommendations made by United States color industries and trades to the Department of Agriculture. Investigations, other than on animals, bearing on the harmfulness of coal-tar colors.

Cite this entry as: () Coal tar colors. In: Gooch J.W. (eds) Encyclopedic Dictionary of Polymers. Springer, New York, A method for the separation of the seven permitted coal-tar colors when occurring in mixtures.

Related Titles. Series: Circular (United States. Bureau of Animal Industry) ; By. Price, Thomas Malcolm. Type. Book Material.

Published material. Publication info [Washington,G.P.O.] Subjects. Coal-tar colors Call Number. texts All Books All Texts latest This Just In Smithsonian Libraries FEDLINK (US) The chemistry of the coal-tar colours Item Preview remove-circle Share or Embed This Item.

Coal-tar colors Publisher London: G. Bell Collection cdl; americana Digitizing sponsor MSNPages:   The term “coal tar colors” persisted, even as the use of coal tar faded. By the s, petroleum was replacing coal tar as the source of vibrant food : Anne Ewbank.

Coal-tar colors used in food products by Hesse, Bernhard Conrad.,Govt. print. off. edition. See Aniline Pigments. Cite this entry as: Gooch J.W. () Coal Tar Colors.

In: Gooch J.W. (eds) Encyclopedic Dictionary of Polymers.Additional Physical Format: Online version: Benedikt, Rudolf, Chemistry of the coal-tar colours. London, G. Bell and Sons, (OCoLC)Colours: Coal Tar and Colour: Coal Tar and Coal Tar Colours Companies.

Google Plus Facebook Tweeter Email. Show Sidebar. Coal Tar Colours Related Products. coal tar colours.