ish. As soon as the varnish becomes sticky, place the engraving
face down on it, and press it well into the varnish. After the varnish
becomes thoroughly dry, moisten the back of the engraving and remove the
paper very carefully by rubbing. When the paper is all removed and the
surface becomes dry, varnish lightly with copal.
METAL FOR STEREOTYPING.
For every six pounds of lead add one pound of antimony. The antimony
should be broken into very small pieces, and thrown on the top of the lead
when it is at red heat. It is a white metal, and so brittle that it may be
reduced to powder; it melts when heated to redness; at a higher heat it
evaporates.
The cheapest and most simple mode of making a stereotype metal is to melt
old type, and to every fourteen pounds add about six pounds of grocer's
tea-chest lead. To prevent any smoke arising from the melting of tea-chest
lead it is necessary to melt it over an ordinary fire-place, for the
purpose of cleansing it, which can be done by throwing in a small piece of
tallow about the size of a nut, and stir it briskly with the ladle, when
the impurities will rise to the surface, and can be skimmed off.
In the mixing of lead and type-metal see that there are no pieces of zinc
among it, the least portion of which will spoil the whole of the other
metal that is mixed with it. Zinc is of a bluish white color; its hue is
intermediate between that of lead and tin. It takes about eighty degrees
more heat than lead to bring it into fusion; therefore, should any metal
float on the top of the lead, do not try to mix it, but immediately take
it off with the ladle.
HOW TO FIX PENCIL MARKS SO THEY WILL NOT RUB.
To fix pencil marks so they will not rub, take well skimmed milk and
dilute with an equal bulk of water. Wash the pencil marks (whether writing
or drawing) with this liquid, using a soft camel-hair brush, and avoid all
rubbing. Place upon a flat board to dry.
HOW TO OBTAIN A BRIGHT AND LASTING RED EDGE.
A bright and lasting red edge may be obtained by the following
process:--Take the best vermillion and add a pinch of carmine; mix this
with glaire, slightly diluted. Take the book and bend over the edge so as
to allow the color to slightly permeate it; then apply the color with a
bit of fine Turkey sponge, bend over the edge in the opposite direction,
and color again. When the three edges have been done in this manner, allow
them to dry. Next screw the book tightly up
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