The restoration of color under particular conditions may also be obtained by treatment with tannic acid, potassium ferro-cyanide (acidulated) or a weak solution of an infusion of galls.
After bleaching the mark by either reagent, the iron of the ink remains mordanted on the paper, and the mark may be restored by treatment with a dilute solution of galls, tannic acid, or acidulated ferro- cyanide.
The gall-nut contains gallic and gallo-tannic acid, and which acids, in conjunction with an iron salt, forms the sole base of the best ink.
It read as follows: "Take of pure, dry tannic acid, 23.
Leather is made from the true skin and tannic acid.
Hog skin is so full of oil that it resists the tannic acid, yet saddles are made from it, and it has other uses.
The union of the white fibres of gelatin, gluten, and kindred substances with the tannic acid, forms insoluble compounds which have great resistance and strength.
It is strongly impregnated with tannic acid, which tends to destroy iron fastenings.
Defn: Pertaining to, or designating, a variety of tannin or tannicacid found in Acacia, Mimosa, etc.
Defn: A compound obtained as a yellowish gray powder by the action of acetyl chloride or acetic anhydride or ordinary tannic acid.
Defn: Pertaining to, or designating, a tannic acid found in oak bark and extracted as a yellowish brown amorphous substance.
Used especially as ointment, but has no advantage over tannic acid.
Iodoform or Iodoformogen: as local application, alone or mixed with tannic acid.
Iodo-tannin: solution of iodine in tannic acid, on cotton-wool.
Acid, Carbolic: with tincture of iodine andtannic acid as ointment.
Dry, abraded surfaces may be treated by applying a mixture of glycerine four ounces, tannic acid one-half ounce and carbolic acid one dram.
The following dry dressing dusted over the red, moist, abraded surfaces is quite healing: tannic acid one ounce, boric acid four ounces, and calomel two ounces.
Two parts boric acid, four parts flour, and one part tannic acid may be dusted over the moist surface.
They are boiled together and thetannic acid of the hull sets the color.
They leached the tannicacid flavor with lye and brought them to a par with the sweet acorns of White Oak.
There has been a limited use of its tannic properties as an astringent by white men.
It is the large amount of tannic acid in the red wines and well-hopped beer which is the cause of their never being attacked with 'graisse,' or 'ropiness.
Dissolve sulphate of quinine in slightly acidulated water, and add a solution of tannic acid as long as a precipitate forms; wash this with a little cold water, and dry it.
The filtrate contains the green, which can either be kept in solution or be precipitated by means of tannic acid or acetate of sodium.
From tannic acid or tannin and powdered sugar, of each 1/2 dr.
After some time the percolated liquid will be found divided into two distinct portions, the lower and heavier one being a watery solution of tannic acid, and the upper one an ethereal solution of gallic acid and colouring matter.
The bark is free from any bitter principle, as well as from tannic acid.
For dyeing on cotton with the aniline colours, the cloth or yarn is steeped in sumac or tannic acid, dyed in the colour, and then fixed by tin; or it may be steeped in sumac and mordanted with tin, and then dyed.
Dissolved in water, it is used as a test for hydrocyanic, gallic, and tannic acids.
The solution of gallo-tannic acid may be obtained by making a strong infusion of bruised nutgalls in boiling water, and when cold, straining it.
A third plan, and one attended with less risk to the paper, is to brush over the manuscript with a moderately strong aqueous solution of gallo-tannic acid, to wash with water, and afterwards to dry it at a temperature of about 150 deg.
The results of applyingtannic acid are to harden the pelt and discolour and weaken the fur.
Neither gallic {921} nor tannic acid answers the purpose so well as acorn flour.
An ointment of tannic acid, glycerin, and simple cerate, or one containing calomel and extract of opium, will be found useful.
These insoluble compounds, however, have sufficient acid-affinity left in the combined tannic acid to unite also with the basic aniline colours, forming very fast or insoluble colour lakes.
But tannic acid, alone, does not form very fast lakes with Magenta and the other basic dyestuffs, and so a means of rendering these lakes more insoluble is needed.
Perchloride of tin, in a similar manner, yields insoluble tannate of tin with tannic acid.
It is found thattannic acid and tartar emetic (a tartrate of antimony and potash) yield a very insoluble compound, a tannate of antimony.
An acid much used, and very valuable for this purpose, is tannic acid.
There are but few acids that act like tannic acid in fixing basic aniline dyestuffs, but oleic acid and other fatty acids are of the number.
If we add water to this thick liquid, a clear solution is obtained, and then on adding tannic acid the fibroïn is precipitated.
On adding tannic acid solution to all three, only the silk yields a precipitate, a rather curdy one consisting of fibroïn.
An agent that arrests discharges by causing contraction, such as tannic acid, alum, zinc, etc.
Intestines may be irrigated with a two per cent solution of tannic acid.
Its astringent property is due to the tannic and gallic acid it contains.
Their great value depends upon the presence of certain alkaloid substances called quinine, cinchonine, and quinidine, which exist in the bark in combination with tannic and other acids.
In some forms of ear complaint powdered borax, as a constituent of the "drops" to be used has been found useful, and tannic acid in other forms.
Because the first infusion, if the water used is at the boiling temperature, takes up the essential oil of the tea, while the second water receives only the bitter extract supplied by the tannic acid of tea.
And, lastly, there are the acids known as caffeo-tannic and caffeic acids, which are modified forms of tea tannin.
Nevertheless, it is a fact that this anti-tannic tea-pot has many excellent points about it, and is sure to meet with favour.
Tannic acid is found in nearly every plant that grows, and its combination with the fresh skins spread or thrown thereon, may have given rise to the observation of the beneficial result and subsequent practice.
The drug is frequently used in diarrhoea, its value being due to the relative insolubility of kino-tannic acid, which enables it to affect the lower part of the intestine.
Kino-red is also present in small quantity, being an oxidation product of kino-tannic acid.
The chief constituent of the drug is kino-tannic acid, which is present to the extent of about 75 %; it is only very slightly soluble in cold water.
Ries (6) has found that gallo-tannic acid is adsorbed readily and increases the plasticity of clay.
In combination with ordinary mordants, tannic acid aids the attraction of the colouring matter to the fibre and adds brilliancy to the colours.
The use of astringents in dyeing depends upon the tannic acid they contain.
A bath is prepared with 2 to 5 per cent of tannic acid of the weight of the cotton, and a sufficient quantity of water.
Before mordanting with alum, the cotton is often prepared with tannic acid.
The astringents mostly used are tannic acid, gall nuts, sumach and myrobalams.
Acorn cups of certain species of oak from South Europe, containing 25-35% of tannic acid.
Tannic acid is the best tannin for mordanting as it is the purest and is free from any other colouring matter; it is, therefore, used for pale and bright shades.
Cotton has a natural attraction for tannic acid, so that when once steeped in its solution it is not easily removed by washing.
Those gall nuts which are not pierced contain most tannic acid.
From its behaviour with the dyes, and with tannic acid and metallic salts, it would appear that lanuginic acid contains both acidic and basic groups.
Coffee also contains from three to four per cent of tannic acid.
In addition to the evil effects caused by the caffein which it contains, tea is more destructive to the normal activities of the stomach because of the tannic acid.
The student may get some idea of what the stomach of the tea-user has to contend with, when it is stated that tannic acid gets its name from the essential action that this substance has in the process of tanning leather.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "tannic" in a variety of sentences. We hope that you will now be able to make sentences using this word.
