Perchloride of tin, in a similar manner, yields insolubletannate of tin with tannic acid.
The tannate of rosaniline (colour principle of Magenta) is a tolerably insoluble lake, which can be precipitated by Magenta from a solution of tannate of soda, the Magenta being capable of displacing the soda.
We then dip the mordanted piece of cotton into the colour bath, containing, for instance, Magenta, and it is dyed a fine red, composed of a tannate of antimony and Magenta.
It is found that tannic acid and tartar emetic (a tartrate of antimony and potash) yield a very insoluble compound, a tannate of antimony.
These substances combine with one another to form a tannate of iron, which gradually changes on exposure to the air into another iron tannate, which is insoluble and constitutes the black pigment of writing.
Prior to this, however, the blue provisional colouring matter appears to become enveloped in the particles of iron tannate so that it no longer reacts rapidly with chemical reagents.
It is better to give the "tannate of pelletierine," a compound of tannin and one of the alkaloids that Tanret discovered in pomegranate root.
A sufficient dose of tannate of pelletierine is 30-40 centigrams in wafer form, followed by a purge and with the other precautions and preparatory measures mentioned above.
Another method of mordanting cotton is to fix the metallic salt on the fibre as a tannate instead of an oleate.
The cotton is then worked in a solution of tartar emetic or stannic chloride, so that the tannic acid absorbed by the fibre may be fixed upon it as insoluble tannate of antimony or tin.
The tannate is decomposed in the usual way with litharge and extracted by alcohol.
After neutralisation with ammonia, the digitalin is precipitated with tannin, and the tannate of digitalin resolved into tannate of lead and free digitalin, by rubbing it with oxide of lead and spirit.
Gallic acid does not decompose the salts of protoxide of iron, but it forms, with the sulphate of the peroxide, a dark blue precipitate, much less insoluble than the tannate of iron.
When ink consists chiefly of tannate of peroxide of iron, however black, it is merely superficial, and is easily erased or effaced.
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.
It is usually prepared from tannin, and both give a dark color with iron salts, formingtannate and gallate of iron, which are the essential ingredients of common black ink.
The iron-tannate constitutes the foundation of the color which gets its intensity, and necessary brilliancy and bloom from the wood dyes.
No two give identical reactions--at all events not when mixed with the iron tannate to form the pigment in writing.
The tannate of cannabin, given in doses varying from five to ten grains, has been recommended as an hypnotic; but, like the extract from which it is derived, its effects are rather uncertain.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "tannate" in a variety of sentences. We hope that you will now be able to make sentences using this word.
