Document xz8E1138KDQ0YL2N0R59Qdxzb

lipaent Division, >rriae of Chief of Ordnance,^ Department, Washington, D. C. [jCNixitlemen: la reply to your letter of August 7th regardingGelmet `'points ana. in further reference to your letter of August 3rd etsd our reply of August 6th on the same subject, it say be ;#aid that ooneldoring the letter of June 26th from Sherwin 1111ear Co., It ieobelieved that the Government formula re ferred to ir to be preferred to that suggested by Shervin ^Williams Co., for the reason that lithopone is a pigment foot adapted to outside exposure. It ie believed that equal ly good oarvioe can '>e had from a paint oor.taln.tng a cheaper 'pigment and of much simplex composition than either of the [palate auggeeted. Such a paint ctvn be made from ocher with a small amount 5.^ Of lampblack to produoe the desired.color. 70r euoh work ' it in believed thr.t the helmets should be baked after apply ing the paint. If this oan be done the vehicle can bo simply lincced oil with drier and volatile thinner. Such a paint con he easily made from ocher in oil thinned with drier and turpentine, or mineral spirits, which is cheaper and equally atisfaotory. It may be said in this connection that the helmet you sent with your letter of August 7th is painted with an ocher paint containing no lead or sine pigment, and from the character of the coat appears to have been baked. Enoloted find a sheet of steel which hat been painted p*-?*,*3 * Paint made fr^s ocher, lampblack, linseed oil, liquid P* ^ containing about 59^ pigment and about ` 8a> linseed oil. One coat of this paint was brushed on, baJcdd for 30 minutes at 130C. , oeoled, a seoond ooat applied, sprinkled with sand, and baked for 30 minute# at 130C. If you desire to purchase a ready mixed point of this Oharaoter wt will be pleased to draw up a specification, but cefore doing this ws will have to know the method of applicar tion since the proportion of volatile thinner will vary "pending upon the method of application* that is, whether *ne paint Is applied by bruehing, spraying or dipping. Respeotfully,