Platers' Guide Volume 14

Platers' Guide Volume 14

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1918 edition. Excerpt: ... in with bad intent, about V; lb. of white arsenic. The deposit is a gray finish whether low voltage or high voltage is used. There is no appearance of a copper or brass deposit. Have thrown in about 15 lbs. of carbonate of copper, also sufficient cyanide to dissolve it. There is no improvement yet. Vi/hat is the best remedy? How much gelatine can be added to 100 gallons of nickel solution? Method of using it as a brightener in above solution. What is effect of it if added in excess? Answer--We do not know of any method of extracting the arsenic 'from your brass solution. You could make up a new solution, then use up the old one by gradually feeding it into the new one but as brass solutions that contain arsenic in any appreciable quantity are very erratic in their actions, we would strongly advise you to discard the old one and make up a new one. Under certain conditions the addition of gelatin to sulphate of copper solu tions yield beneficial results. But there is no rea"on for using it in a nickel solution. Too Much Doctored No. 725-1 have a job where I found a nickel bath of Z50 gallons, standing 672. Work is brittle and unsatisfactory. My predecessor put in 20 lbs. salammoniac, 10 boracic, Z carb. nickel and cupfull sulphuric acid. I have had a lot of trouble with it. I have added 25 lbs. double nickel salts and Z5 single, and about V; cupfull ammonia. Some better, but it threw off gas and a fine powder formed. W'hat shall 1 do? Answer--It will be almost impossible to obtain a-ny satisfactory results from a solution that has been doctored up as much as the one you are trying to use. You may be able to obtain fairly satisfactory results by adding enough carbonate of ammonia to bring the nickel solution down to almost...show more

Product details

  • Paperback | 318 pages
  • 189 x 246 x 17mm | 572g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236990773
  • 9781236990778