US95040A - Alfred pa raf - Google Patents

Description

ennui, swat patent dtihiite.

ALFRED "PARAF,

Letters Patent No. 95,040, dated September nvflrno'vnn PROGESS FOR PRINTING- COLORS 01v 'rnxmnz: MATERIALS.

The illchednle referred to in these Letters Patent and making part cl the same.

To all whom a't may com e'rn Be it known that I, ALFRED PARAF, of France, at present a resident in the city, county, and State of New York, have made an invention or discovery of a new and useful Process of Obtaining, Bright Colors upon Olothby Printing, and that the following is a full, clear, and exact description and specification of my said invention.-

My invention consists of the process of printing colorsupon cloth or other textile fabric, by the following operations, viz:

First, the application of the coloring-matter to the cloth by printingit thereon.

Second, the application to the cloth of a chemical compound of an alkali and a volatile acid, which will decompose, by steaming the cloth subsequent to the printing of the color, andthus leave the alkali free to autumn and brighten or develop the printed color or to translorm it into the desired color. Third, the steaming of the printed cloth.

The order in which the first two operations are performed is not material to the invention, although I the color, and each has that alkali combined with a volatile acid which passes off or is dissipated in the operation of steaming, leaving the alkali free to act upon the color.

In order that my invention may be fully understood, I will proceed to describe the mode in which I have practised it with success,when printing madder-colors upon cotton cloth.

The preparation of-m'adder which I prefer to use for this purpose is the extract of it called tinctorine, and described in the patent granted to me the 17th day of August, A. D. 1869. Forprinting red madder-color, I prefer a compound made as follows, viz:

Tinctprine, forty pounds.

Rancld olive-oil, ten pounds. Liquid acetic acid, at 10 Twaddle, one hundred pounds.

Starch, in powder, twenty-two pounds.

I boil the mixture, so as to dissolve the starch, then permit it to cool, and add- Solution of acetate off'alumina, at 16 Twaddle, fifteen pounds.

Solution of acetate of lime, at 16 Twaddle, ten pounds. 7 I 1 For printing chocolate inaddercolor, I prepare a compound, made as above, using the same ingredients, with the exception of the acetate of alumina. I replace that ingredient by an "equal quantity of the solution of acetate of --iron at 10 Twaddle.

For printibg purple inadd'er-colors, Imixtogether equal quantities 6f the above two compounds.

I print the compound upon the cloth in the same manner and by the same means as are commonly used for printing cotton cloth with other compounds. Then I hang up the printed article in the air for at least two hours; theeffect of which appears to be to start the volatilization of the acetic acid. I then place the article in a steam-chest, such as is commonly em ployed in print-works; r the purpose of steaming printed cloths, and I Steam it with steam, of two and a half pounds pressure, [or halt an hour. 1 afterward hang up the article, so as to expose it to the contact of air, for two hours, and then wash it, if I find washing necessary.

The theory of my process appears to be as follows: the volatile acid prevents the alumina or the iron (as well'as the alkali) from combining with the coloringmatter until the printing is efiected. The steaming dissipates the acetic acid, permitting the alumina, or the iron, to form a colored compound with the coloringmatter, and the alkali to develop, transform, or brighten the color produced. Theemployment of the oil, or some equivalent, is advantageous, because it combines with any excess of alkali to form a soap, thereby prcventing such excess from injuring the color.

The mode of application above described may be varied. Thus, for example, the clothmay first be .padded (in the common mode practised by calicoprinters) with the acetate of the alkali, after which it should be hung up in an ageing-room (where the atmosphere is warm andmoist) until the acetic acid has passed off. The cloth may then be printed with a compound of the coloring-matter, from which the acetate of the alkaliis omitted, after which the cloth should be treated as when it is printed simultaneously with the color and with the acetate of the alkali.

Again, an acetate of lime, or of soda, or of potash, or a mixture of these, may-be compounded with the coloring-matter before the latter is compounded with the starch and acetic acid. In this case, the starch should be boiled with the acetic acid, and the solution should be permitted to 6001, after which the compound of the color and acetate of the alkali maybe stirred into it, and also the acetate of alumina, or of iron, according to the color required.

The process, thus described, is not restricted to 'madderscolors, but mag, be used with advantage in rinting other coloring-materials, the colors of which i wood, alkanet, anotto, ehromate of lead, rhubarbroot, Persian berry, chrome-green.

Moreover, the ingredients used in making the compounds that are applied to the cloth, and the proportions in which the ingredients are compounded, may be varied, as found expedient, so long as the process be not materially changed.

I claim as my invention, and desire to secure by Letters Patent- The process, hereinbefore described, of printing colors upon a textile material, by printing it with the coloring-material, applying a compound of an alkali and volatile acid to it, and steaming it, substantially as before described.

In testimony-whereof, I have hereto set my hand, this 23d day of August, A. D. 1869.

Witnesses: ALFRED PARAF.

E. S. RENWICK, W. L. BENNEM.