Coat the Paper
"Having got the paper fit for the
purpose, the first thing to be done , before applying the blackening
agent, is to imbue it with some of the metallic chlorides."
"A solution of one salt may be
used, or a combination of two or more. I use a mixture of two
chlorides - viz. terchloride of gold and chloride of sodium,
of the following strength:
- Chloride of sodium, 50 grains.
- Solution terchloride of gold, 30 drops.
- Rain water (pure), 20 ounces.
The strength of the solution
of terchloride of gold is 15 grains of the crystallized chloride to 4
drams of distilled water."
"The solution being put into a
shallow dish of a size suitable fro the sheets of paper, they are taken
one at a time by two adjacent corners, and are slowly drawn through the
solution, fires one way then the other. They are then pinned by one
corner on a wooden screen to dry."