International Library of Technology; A Series of Textbooks for Persons Engaged in the Engineering Professions and Trades, or for Those Who Desire Information Concerning Them Volume 126

International Library of Technology; A Series of Textbooks for Persons Engaged in the Engineering Professions and Trades, or for Those Who Desire Information Concerning Them Volume 126

List price: US$10.96

Currently unavailable

Add to wishlist

AbeBooks may have this title (opens in new window).

Try AbeBooks

Description

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. 1906 edition. Excerpt: ...do so by providing himself with an enameling oven, or he may turn the work over to a japanner. There are a number of firms that not only sell ovens for enameling, but also manufacture enamels in black and colors. Enamels should be heated to from 200 F. to 300 F.; colors should not be heated beyond. 250 F.; black may be heated to 300 F. A patent drier may also be used for a filling. This material is sold in original packages, from i pound up, and is mixed with lampblack until it is of the consistency of thick putty. The letters are filled with this paste by shaping a piece of pine wood into the form of a putty knife and running the paste into the letters, the operator being careful to work the wooden knife in one direction only. The grain of the metal shows in the buffing, and it is well to follow the grain. This is very important, for otherwise small scratches are likely to show prominently. After the filling has been completed, the paste remaining on the surface should be removed with a woolen rag and alcohol. Dry lampblack should then be thoroughly rubbed into the faces of the letters, after which the signs may be allowed to dry. 116. Polishing Metal Plates.--Brass or metal plates are polished with Pultz paste, or with a liquid preparation mixed as follows: To 1 pint of water add 1 paper of tripoli (rottenstone) and 1 ounce of oxalic acid. Metal plates should be cleaned every day, in order to keep them in good condition. By so doing, the work of cleaning brass plates is rendered comparatively easy; while if they are neglected for several days, they become so tarnished that it requires considerable effort to restore them to a good condition. ETCHING ON ALUMINUM 117. Acid Used.--Nitric acid, although most powerful and effectual in...show more

Product details

  • Paperback | 72 pages
  • 189 x 246 x 4mm | 145g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236777786
  • 9781236777782