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printed surface to the glass by any ordinary paste made from starch. All
the air must be carefully excluded from between the print and glass.
When perfectly dry, liquid hydrofluoric acid about the specific gravity of
1.14 is applied for about three minutes, when it is washed in water to
remove the paper and the acid, and the figure of the print is then found
upon the glass. The printed portion of the paper may also be cut in
outline and pasted on the glass, then transferred. Glass that is "flashed"
on the surface with another color may be treated in this manner, when a
portion of the flashing or surface will be removed, and the picture will
remain in color.
The distinguished French chemist,
M. Chevreul, who has devoted so much attention to
the subject of color, has lately published a memoir on painted windows,
in which there are many points which deserve the attention of artists
and others who are interested in the manufacture of colored glass.
It has often been much noticed that old stained glass windows have a
much richer effect than modern ones, and M. Chevreul,