US240526A - Philip h - Google Patents

Description

I UNITED STATES PATENT Fries,

PHILIP H. IMANDEL, or BOSTON, M ssnorrnsnrrs, AssieNoR TO THE MECHANICAL GOMPANYQOF NEW YORK, N. Y.

MIXTURE FOR PREPARING AND SERSIIIZING GELAIlNlZED PAPER.

SPECIFICATION forming part of Letters Patent lilo. 240,526, dated April 26, 1881.

Application filed March 16, 1881 (N0 specimens.)

I To all whom it may concern:

Be it known that 1, PHILIP H. MANDEL, of Boston, countyof Suffolk, and State of Massachusetts, have invented a new and useful Improvement in Mixtures for Preparing and Sen sitizing Gelatinized Paper for use in Decorating Vitreous and Vegetable Substances and Method of Applying the said Mixture to Paper, of which the following description is a specification.

This invention has for its object the produc; tion of a paper to be used for decorating vitre 011s and vegetable substances, such as china,

glass, and wood; and it consists in a mixture, as hereinafter described, whereby the surface of the paperis adapted to receive mineral and other pigments, such as are employed in the decorations of china, glass, and wood, and imprint a number of impressions directly on such substances.

In another application filed by me May 14, 1880, I have described a paper suitably prepared to receive printers ink to transfer a design upon metallic surfaces; but such prepared paper is not adapted to receive and transfer the class of pigments or colors such as are employed for decoratin g vitreous substances, such as china and glass, or vegetable or fibrous substances, such as wood, &c. p

The prepared surface of the paper employed by me, as described in my said application, to transfer a design to a metal surface, is not sufficiently hard to receive and hold mineral colors or pigments which aroused for vitreous substances, such as china and glass, and which are subsequently baked on the said vitreous substances. With such paper, on applying the design to vegetable or similar substances of a fibrous or porous nature, I have found that the gelatine on which the ink is applied adheres thereto when the paper is removed or pulled off.

In this my present invention I employ all the ingredients described in my application re ferred to, but in different proportions; but I have added to the ingredients therein mentioned other ingredients, as hereinafter specified, whereby I am enabled to give to the paper a very different surfaceone which adapts it to receive and correctly apply to vitreous,

vegetable, and fibrous substances the class or kind of color or pigment necessary to'bethereexpense. This negative is employed to print upon my prepared paper the designer pattern which 18 to be transferred to the vitreous, vegetable, or fibrous substance to be decorated,

and when two or more colors are to be applied in the decoration it Will be understood that two, or more negatives will be used",'each negative containing only that part of the entire design which is to appear in one color,

In the application of my improvement or invention to the decoration of the great'variety of articles included under the"head;,of vitreous, vegetable, and fibrous substances which are now being extensively decorated, I take, by preference, strong paper and coat one side of it with gelatine dissolved in water, and when the gelatine is dissolved alcohol is added. 1 have secured the best results by employing, one-half pound of Maydenburg gelatine dissolved in forty-eight ounces of water, and as the gelatine is dissolved two ounces of alcohol are added. The paper is then hung up to dry. I then make a sensitizing and hardening solution, substantially as follows, viz: I take seven and one-halfounces of bichromate of ammonia and dissolve it in fifteen ounces of water, and then add two grains nitric silver, which makes a dark opaque solution; but to make this solution of paler color, more sensitive to light, and at the same time insure additional hardness to the gelatine surface which is to be acted upon by light through the negative, I add three grains iodine, six grains of chloride of zinc, and four grams of tannin solution--a solution composed of, say, four ounces of tannin to forty ounces of water. The gelatinized paper having been dried, its gelatinesurface is laid on the solution described for about thirty seconds, when it is removed and dried in a dark room. After it is dried it is ready to be placed, in connection with the negative, in anordinary photographers printingframe, *and the negative, exposed to light,

stone having upon it the color to be used, afterwhich the prepared surface of the paper so colored is washed in cold water, thus removing all the bichromate not hardened by the light, and at the same time swelling the unhardened gelatine surface, leaving as a printing-surface only that part of the gelatine which was sufficiently hardened to resist the action of the water when the paper was washed. This hardened portion having color applied to it may be used as a printing-surface to apply the design in color to vitreous, vegetable, or fibrous substances. The paper having a prepared surface of the hardness and character described is, as I have found, admirably suited to receive and transfer to china and glass mineral colors or pigments, such as are necessarily employed in decorating china and glass colors, which could not be employed with the paper if the gelatine upon its surface were not subjected to the presence ofiodine, zinc, and tannin, as stated, to harden the gelatine sufficiently for printing; and, further, if the gelatine were not so hardened it would stick to the surface of substances of vegetable or fibrous character, such as Wood and cloth.

Paper prepared in this way may be made to produce from twelve to twenty impressions.

I shall not attempt to explain all the chemical effects of the ingredients mentioned; and

while I consider the proportions of the ingredients herein mentioned to be the best for practical work, I do not desire to limit myself to the exact proportions; and I also desire it to be understood that instead of the said ingredients I might employ any of their usual chemical equivalents, which, in this class of work described by me, would operate in a like manner.

I claim 1. As an improved article of manufacture, the herein-described mixture for preparing and sensitizing gelatinized paper, it being composed of water, bichromate of ammonia, alcohol, nitric silver, iodine, chloride of zinc, and tannin, substantially as described.

2. The herein-described method of preparing a piece of paper for a printing-surface to apply color to vitreous, vegetable, and fibrous substances, which consists in coating one face of the paper with a solution of gelatine in the presence of alcohol, drying the said paper, and then subjecting the prepared face to the action of a sensitizing and hardening mixture, substantially such as herein described, adapted to receive color and form a printing-surface capable of transferring numerous impressions, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

PHILIP H. MANDEL.

Witnesses:

G. W. GREGORY, BERNICE J. NoYEs.