Paints For Roofs And Roof Paper:
Carbolineum.
I.—Pale.—Melt together in an iron kettle, over a naked fire, 30 parts of American rosin F and 150 parts of pale paraffine oil and stir in 10 parts of single rectified rosin oil.
II.—Dark.—Melt 100 parts of anthracene oil and 20 parts of American rosin F on a slow fire. Next stir in 2 parts of Para rubber solution (or solution of caoutchouc waste) and keep on boiling until all is dissolved. When this is done there should be still added 5 parts of crude concentrated carbolic acid and 5 parts of zinc chloride lye, 50° Bé., stirring until cool. The last-named admixture is not absolutely necessary, but highly advisable, owing to its extraordinary preservative and bactericidal properties.
III.—Colored.—For red, melt 100 parts of coal-tar oil, then stir in 50 parts of pale paraffine oil, and finally 75 parts of bole or iron minium, and pass through the paint mill. Although the addition of iron minium is very desirable, it is considerably more expensive. For gray, proceed as above, with the exception that metallic gray is used in place of the bole. For green, metallic green is employed. The colors are identical with those used in the manufacture of roof varnish. To increase the antiseptic properties of the colored carbolineum, any desired additions of phenol or zinc chloride solutions may be made, but the chief requirement in the case of colored carbolineum is good covering power of the coating.
Paints for Roofs Covered with Tar Paper, for Roofing Paper, etc.—
| I.— | Distilled coal tar | 70 parts |
|---|---|---|
| Heavy mineral oil (lubricating oil) | 10 parts | |
| American rosin | 20 parts | |
| II.— | Distilled coal tar | 50 parts |
| Trinidad asphalt | 15 parts | |
| Mineral oil, containing paraffine | 10 parts | |
| Dry clay, finely ground | 25 parts |