Mr. Talbot's gallate of silver process was not patented or published till 1841; whereas the Rev.
Such mixtures form the staple black inks of commerce; they are essentially an insoluble iron gallate in extremely fine division held in suspension in water or a soluble compound dissolved in water.
Whenever the metal vanadium shall become more abundant, as it probably may ere long, we shall possess the means of making an ink, at a moderate price, much superior to the tannate and gallate of iron.
Gallic acid takes the oxide from the acetate and nitrate of lead, and throws down a white gallate unchangeable in the air, when it is mixed with that acetate and nitrate.
It is usually prepared from tannin, and both give a dark color with iron salts, forming tannate and gallate of iron, which are the essential ingredients of common black ink.
It is therefore certain that the use of gallate of silver as a photogenic agent had been made public in two lectures by Mr. Brayley at least two years before Mr. Talbot's patent was sealed.
You inform me that some persons doubt whether I really obtain gallate of silver when using an infusion of gall-nuts, and that one of Mr. Talbot's friends raises the question.
But what is more to the point, Mr. Brayley, in explaining my process in his lectures, showed experimentally how gallate of silver was formed, and confirmed my view of the sensitiveness of the preparation.
The "tanno-gallate of iron" one has, however, no date.
It has been said that the Tanno-gallate of Iron Inks (iron salts, nut-galls and gum) were first used in the fourth century.
We do not make a tanno-gallate of iron ink without added color, and so far as we know, there is no such ink on the market, as it would be practically colorless and illegible.
His chemical writing fluids are very popular, but he does not make a tanno-gallate of iron ink without "added" color, for the trade.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "gallate" in a variety of sentences. We hope that you will now be able to make sentences using this word.
