In Asturias, the cider apples are more bitter and tannic than in other regions.
An acid much used, and very valuable for this purpose, is tannic acid.
Those gall nuts which are not pierced contain most tannic acid.
tannic acid, not as free acid, is combined with caffein as a tannate.
It is a durable wood, made so by the tannic acid it contains.
tannic and Gallic Acids may generally be used with great advantage in all cases in which Astringents are required.
The bark is free from any bitter principle, as well as from tannic acid.
The Ceylon tea possesses little or no tannic acid, and is not nearly so deleterious to weak stomachs as other varieties.
It is often of importance to the tanner and dyer to determine the richness of this article in tannic acid or tannin.
It seems to be suited for pills containing chemical substances, such as quinine, tannic acid, &c.
tannic tan·nic (tān'ĭk)
Of, relating to, or obtained from tannin.