Drawings in colored inks on tinted paper are difficult to reproduce
satisfactorily, and of all combinations a bluish ink upon a yellowish
paper is to be avoided.

In general, it can be said that everything, even including line drawings
in pen and ink, _can_ be reproduced by the half-tone processes, the
quality of the plate depending upon the character of the original.
Water-colors, monochrome drawings in wash, pencil drawings and any
combinations of these, are reproducible, but with varying success. The
same conditions which apply to line work also hold good to a
considerable extent in the present case. A combination of vigorous black
ink lines and lighter more delicate work put in with thinned or gray ink
will in all probability be very unsatisfactory, as the chances of
holding the relation between the two, or in fact of preserving the
lighter lines at all, without over-emphasizing the darker portions, will
not be very great. Delicate drawings can seldom be reproduced without
giving a background tint all over, and this usually destroys the life
and snap of the original. This is especially true of drawings upon
reddish or yellowish paper, which on this account should be avoided if
possible. It should be borne in mind that yellow and red photograph
dark; and blue, light. This often makes a great difference of effect in
the reproduction and sometimes makes it impossible to get satisfactory
results at all, especially in delicate drawings.

Pencil drawings made with light lines will not reproduce well, as there
is too little contrast in color between the lines and the paper; but
sketches made with a soft pencil and strong contrasts frequently give
surprisingly good results.

When drawings are to be made, especially for reproduction, the question