he bottom.

GLOSS PRINTING.

Gloss printing is done in two ways; one by using the gloss inks specially
prepared for the purpose, the other by printing the gloss preparation on
over the finished job, or over that portion of it required to be glossed.
To the inexperienced this is a difficult operation, attended by many
failures. It is accomplished as follows:--Prepare a tint block the exact
size and shape to cover the printing to be glossed. The block should be of
boxwood or hard metal--soft metal will not do. Fix it on the press and
make it ready as for ordinary work, with a good, even impression. Wash up
the ink table, the rollers and the block itself thoroughly, removing the
least trace of ink. Replace the rollers and distributors. Now, with a
clean palette knife put a little of the gloss preparation on the ink
cylinder or table, let it distribute for about a minute, and then pull an
impression; if it comes up perfectly clean, the work may proceed, but if
there are any signs of dirt, it is best to wash up again at once. While
working the gloss, keep the machine in motion, and should the gloss become
too sticky (which it is apt to do) sprinkle a very little turpentine on
the rollers. It is best to have a separate hand to put on the gloss, so as
not to delay the feeder, and the sheets should be taken away at once and
laid out singly to dry. The two most important points are to have the
machine clean and keep it in motion. After printing, wash up the gloss
quickly with benzine.

TO BLEACH SHEEPSKIN PARCHMENT WHITE.

To bleach sheepskin parchment white, expose the pieces to strong sunlight
under glass, in a moist atmosphere.

COLORS FOR PRINTING.

For a black color for printing, 25 parts paraffine oil and 45 parts resin
are mixed, either by melting at 80 deg.C., or by mechanical means at the
ordinary temperature. To this mass 15 parts of black are added. For
printing machines, the mixture is composed of 40 parts of resin only,
instead of 45. Resin can, in some cases, be replaced by dammar. Other
colors are mixed by substituting the equivalent of the color to the black.
When cheapness has to be considered, paraffine oil can be substituted by
resinous oil, and resin by Burgundy resin, etc.

HOW TO DYE PARCHMENT BLUE OR RED.

Parchment can be dyed green, blue or red. To dye it blue, use the
following process:--Dissolve verdigris in vinegar; heat the solution, and
apply it by means of a brush on the parchment,