Important: Safety Warning
This page contains a formula or preparation using substances now known to be dangerously toxic, such as arsenic, mercury, lead, or cyanide compounds. Exposure to these substances can cause severe poisoning, permanent injury, or death.
In addition, this page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
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To Make Oiled Paper
Brush 1946. To Detect the Presence of sheets of paper over with boiled oil, in which Plaster in Paper. Calcine the paper in a dissolve a little shellac carefully over a slow fire, and suspend them on a line until dry.
Waterproof. Employed to tie over pots and jars, and to wrap up paste blacking, &c. 1940. Oiled Paper as a Substitute for Oiled Silk. Boiled linseed oil is reboiled with litharge, acetate of lead, sulphate of zinc, and burnt umber, an ounce of each to a gallon. The sheet of paper being laid on a square board, it is well covered with this mixture. The first sheet is covered on both sides; the second, placed on this, receives one coating; and so on to 20 or 50. Separate and hang up to dry. 1941. To Make Paper Fire and Waterproof. Take 26 ounces alum, and 4 ounces white soap, and dissolve them in a quart of water; into another vessel dissolve 2 ounces gum-arabic and 1 ounce glue, in the same quantity of water as the former, and add the two solutions together, which is now to be kept warm, and the paper intended to close vessel, and dilute the residue with vinegar, in a silver spoon; if sulphuretted hydrogen is disengaged, which blackens the spoon, the presence of a sulphate (plaster) will be shown. This adulteration has lately become very common among the paper-makers, with the view of increasing the weight. 1947. To Detect Woody Fibre in Paper. The paper is touched with ordinary strong nitric acid. If wood fibre is present the paper will be colored brown, especially on warming.