Word: dyeing
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Into Wall Street last week leaked news of one of the biggest inter-company stock deals of 1942: the purchase by U.S. Pipe & Foundry Co. of 54,500 shares of Sloss-Shemeld Steel & Iron Co. common stock from Allied Chemical & Dye Corp. The rumored price: more than...
...Removal of iron, copper and other metals in solution for tanneries, dye works, food industries, paper mills...
...facing a new development almost as far-reaching as the change from tintypes to cellulose film. In the 103 years since Louis Jacques Daguerre invented the daguerreotype the use of light-sensitive silver salts has been the basis of photography. Now silver is being replaced by coal-tar dyes. So far this new dye-treated film has been used only to make duplicates of sound tracks from regular film. But scientists believe that dye-treated film for direct photography is in sight...
...dye-treated film, there is no surface emulsion and no silver. Instead, a strip of cellophane is thoroughly impregnated with a mixture of "diazo" compounds which are closely related to dyes, but are only a faint yellow in color. Wherever light strikes, the diazo compounds are quickly and effectively bleached. Developing and fixing are combined in a single operation (exposure of the film to ammonia fumes), which may be done in subdued daylight. This exposure does not change the portions of the film that light has reached, but the ammonia turns the unexposed diazo compound red (or some other color...
...conventional figure in rug designs, from Shiraz to Sears, Roebuck, is the tadpole-shaped fistprint of a moppet. This-according to Persian legend-is why: a rugmaker one day reprimanded his infant son for playing recklessly among his dye pots. The child, incensed, brought down his dripping little fist on a nearby rug. Regarding the curly imprint of the tot's clenched hand, the artist gave the Persian version...