Sympathetic Inks are fluids employed in coloring drawings made for parlor amusement, or the diversion of children and youth. As, for instance, a landscape drawn in ordinary colors with a wintry aspect, cloudy or sombre sky, snow on the ground, and leafless trees, if properly touched with sympathetic inks, will, at any time, when brought near a fire, or otherwise subjected to a certain degree of warmth, change to the hues of summer, the sky becoming of a clear blue, the trees in full foliage, and the turf rich with grass, each with its appropriate shade of verdure, as also flowers of their various natural colors, &c., according to the fancy of the artist, the whole disappearing as the picture grows cold. The chloride, the nitrate, the acetate, and the sulphate of cobalt, form sympathetic inks,—the first, blue, and (with the addition of nickel,) green; the second, red. Chloride of copper gives a gamboge yellow; bromide of copper, a fine rich brown.
Letters written with a solution of acetate of lead, are invisible until exposed to the action of sulphuretted hydrogen, which makes them distinct, with the lustrous greyish black of sulphuret of lead, the same substance which is called galena when it occurs as lead-ore. A weak infusion of galls or other vegetable astringent, will, if applied to paper in the form of letters, become legible when touched with any solution of iron. If written with a solution of ferro-cyanide of potash, letters will remain invisible until touched with a solution of sulphate of iron.
IMPORTANCE OF GOOD INK.
Astle speaks very impressively and justly on this point; and we contribute to this part of our subject by calling attention to facts almost daily occurring or brought to notice in this country, especially in the older cities and states, where town-records, parish-registers, and other documents of ancient date, and of high importance in history, chronology, and genealogy, (as well as in regard to the title and inheritance of estates,) are found obscured and obliterated, causing losses, public and private, that need but to be mentioned to be properly estimated.
In the appendix will be found a fac-simile of a sheet upon which various specimens of ink were thoroughly and fairly tested, which is a brief but emphatic demonstration of a difference of qualities by difference of results.
To show what can be done in the preservation of writing on material even frailer than such paper as we employ, we need but produce the specimen of Egyptian writing on papyrus, pronounced by Champollion to have been executed more than sixteen hundred (1600) years before the birth of Christ, yet still in preservation and legible, as may be seen by the representation we give of it.
This is undoubtedly as old as any specimen of phonetic characters or written letters (representing sounds, not ideas or objects,) extant, made by marking with a fluid upon any substance. There are inscriptions of letters upon stone, for which an earlier date of 4000 years B.C., is claimed with truth. But this is INK-writing, absolutely 3500 years old!
The Chinese assert that they had the art of writing at a period 2950 years before Christ; but they have no records or monuments of that date; and their characters even to the present time, are entire words, representing objects, ideas or things, not sounds. In the art of printing, they pretend to have preceded the European nations about 2400 years, dating their invention of it from the tenth century before Christ. But they have never advanced beyond the first form of the art—letters engraved on solid wooden blocks—the very method in use by Koster, and his associates, until the invention of moveable types by John Gansfleisch, otherwise named John Gutenberg or Guttemberg, in 1435. In both arts, writing and printing alike, the Chinese have remained stiff, solid and immovable at the first step, with the characteristic unchangeability of the yellow races of Eastern Asia, so opposite to the indefinitely progressive and self-improving energy of the nations whose progenitors proceeded west from the original source and centre of the earth’s population. The same ink serves the Chinese both for writing and printing, as does the same kind of paper. This ink they invented about the end of the first century of the Christian era; before which time they wrote on boards or bamboos. Having next proceeded to the use of silken cloth for these purposes, the preparation of paper from that material naturally followed. Their ink, being carbonaceous and oleaginous, is, of course, (like that of the Egyptians and all the other ancients,) unfading, and unalterable by chemical agencies, though capable of being effaced or obscured by watery applications or exposure.
As to their claim of having invented the art of printing, we shall have something to say hereafter.
The Aztecs (in Mexico, before the Spanish discovery and conquest,) extensively employed a picture-writing, as a means of recording events, during a period not exceeding two centuries before that epoch. They had the art of manufacturing materials as a basis of such writing, from the Agave or American aloe, and from cotton, in the form of a very fine cloth. They also used prepared skins for the same purpose, the best specimens of which are pronounced to be more beautiful than the finest vellum. Their manuscripts were sometimes done up in rolls or scrolls, and frequently on tablets, in the form of a folding-screen. Their inks appear to have been coloring matters in watery solutions.