ess to bright colors.

HOW TO PRESERVE COLORED INKS.

If it is necessary to keep colored inks, the best way of preserving them
so that they shall be workable after standing some time is to pour a
little colza oil on the top, and securely close the vessel containing
them. This oil will not generally rob the ink of any of its color, and
even if it is not all poured off afterwards, its presence can do a piece
of cotton wool; when dry, it may be washed in the same way as bronze.
Rolling afterward will improve it very much.

HOW TO BRIGHTEN COMMON QUALITIES OF COLORED INKS.

Common qualities of colored inks may be brightened by using the whites of
fresh eggs, but they must be applied a little at a time, as they dry very
hard and are apt to take away the suction of rollers if used for any
lengthend period.

PRINTERS' VARNISH.

For fine work, a little Canada balsam of the consistency of honey makes a
good varnish of great purity. The coarser but similar Venice turpentine
may also be used with effect where time is precious and purity of tint not
indispensable. A little soft soap may be added to the Venice turpentine.

If the work be coarse and varnish not at hand, a little oak varnish and
soft soap form a good substitute.

TO PREVENT OFF-SETTING.

Setting off may be prevented by slightly greasing or oiling a sheet which
may be placed on the tympan if in press work, or the cylinder if at a
machine. This will answer for several thousands without requiring to be
replaced.

A HARDENING GLOSS FOR INKS.

A hardening gloss for inks may be made by dissolving gum arabic in alcohol
or a weak solution of oxalic acid. This mixture should be used in small
quantities, and mixed with the ink while it is being consumed.

A MODELING MATERIAL.

Some pretty effects can be produced by the use of a composition made by
thoroughly mixing rice flour with cold water, and allowing it to gently
simmer over the fire until a delicate and durable cement results. When
made of the consistency of plastic clay, models, busts, etc., may be
formed, and the articles when dry resemble white marble, and will take a
high polish, being very durable. Any coloring matter may be used at
pleasure.

LEAF COPYING.

Take a piece of thin muslin and wrap it tightly round a ball of cotton
wool as big as an orange. This forms a dabber, and should have something
to hold it by. Then squeeze on to the corner of a half-sheet of foolscap a
little col