Nova Patents
US2470A

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1 claim: 1 independent, 0 dependent

  1. 1
    I claim therein as new, and desire to secure by Letters Patent, is— The preparing of my white paint by the I use and employment of the oil clarified and bleached, as above set forth, iu combination i with the. particular resin above named and de, nominated “gum-dammar” or “soft South ! American gum-copal,” combined in the manner . set forth, with spirits of turpentine and white lead, the whole being prepared and used sub stantially in the manner herein fully made known. HENRY 0. OTTO. To all whom it may concern:Be it kuown that I, Henry Ο. Otto, ot tlje 1 city of Philadelphia, in the State of Pennsyl- < vania, have invented a new and useful Ma nerof Preparing a WhitePaint orOomposition ofMatterfor Painting Houses, Walls, andother articles;and I do hereby declare that the following is a full and exact description thereof. The composition of matter that I use consists mainly of linseed-oil, which is - bleached and prepared by a process to be presently described, of spirits of turpentine, of white lead, and of a resin known under the name of gumdammar,” or more generally by the commercial name of “soft South American copal. lhe latter material has hitherto been employed only in mixture with the proper gum-copal or with other more costly resins on accoun t ot its cheapness;but instead of improving the varnishes into which it has been introduced it has, like the introduction of common resin, served only to deteriorate them ;but in the combination in which 1 employ it it imparts a peculiar enamel-like gloss to the paint, differino- from and superior to any other article with which 1 am acquainted, and that at a diminished cost. . ., One of the most important points in the preparation of my white paint is in the manner in which I clarify and bleach the linseedoil. In this part of the process I take, say, one gallon of linseed-oil, which I put into a clean brass, copper, or other suitable vessel with some crust of rye bread and place it on the fire and let it heat until the crust becomes burned. 1 then by degrees mix in half a pound of white vitriol, (sulphate of zinc,) after which I remove the oil from the fire and allow it to remain at- rest for three or four days, in which time it will be perfectly clarified and fit for immediate use and will be found to work better in the paint prepared by its aid than that mixed with oil clarified in any other mode, and also to possess properties without which my white paint will loose much of its value. In painting houses, walls, and other articles white I usually give to the work two coats ot paint of good white lead, ground and mixed Witnesses: S. E. Harlan, T. S. Murphy.