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Colored Foils

These are made by coloring the preceding foil, highly polished, in spirits of ammonia, by means of the oils of cassia and cloves. (See SILVERING GLASS.) Both these methods vastly increase the brilliancy both of real and factitious gems. Inks the be and will bear dilution with nearly an equal nks.

Writing inks might be included | says that they are very durable and limpid, matters, were it not that they require to have bulk of water, and still be superior in quality the special characteristics of brilliance, per- to ordinary inks. Of the latter ink he says manence, and some degree of indestructibility, that he has writing that was executed with combined with perfect fluidity, in order to fulfill the objects for which they are generally used. Printing and lithographic and other inks are also included under this heading.