US2013291A - Ink - Google Patents

Description

Patented Sept. 3, 1935 rhefiebjeea er my iiivenuon is to provide an improved ink, peculiarly suited for transfer matter of my ink isa dye as before described,

printing dye processes employing a solvent for the coloring matter to bring about or assist in the transferring operation, but which is suited for other purposes as well. By transfer printing dye processes, it will be understood that I am referring to those processes in which the subject matter, is initially printed on sheets of paper or .the like, and thence, and sometimes a considerable time thereafter, is reproduced on the desired articles or materials, by bringing the articles or .materials into contactwith the printed sheets, usually with some pressure, in the presence of the solvent, with the result that the reproduction isby dyeing the article or material.

7 According to my invention the coloring matter employed in the ink is a soluble dye, rather than a lake or other form of pigment; that is to say,

required of the inks used in the particular process employed for laying down the ink; for example, for. laying down the ink on sheets of paper or the like from which the transfers are made to the materials or articles which are, to receive the markings in the end. Therefore the coloring soluble in alcohol or other suitable transfer solvent before dyeing and substantially insoluble in water after becoming afiixed to or combined with l (i. e., dyed to) the fibres of the article or material ultimately receiving the marking. The vehicle is one serving to give the ink those characteristics required of inks used in the particular process used in laying down the ink initially, is a material or materials that is substantially nonvolatile in whole or considerable part so that it will remain on a surface on which it may be printed and thus continue to act as a carrier for the dye after printing, and is substantially composed of a substantiallynon-drying oil or fat, or oils or fats, and especially a non-drying animal or vegetable oil or fat. These oils or fats ,may be thickened as desired or necessary by various substances inert to the dye; preferably I employas a thit'ikener-an albohohsoluble 'resiir or gum such for example as rosin, shellac, elimi, mastic, sandarac, etc. The thickening substance may be mixed into the oil or fat prior to the inclusion of the dye; heat can be used as necessary to assist in securing a thorough mixingof the components. The dye, rather than being carried in the vehicle in solution, exists in the vehicle in a solid state, although finely divided and thoroughly distributed through the -vehicle. Accordingly the vehicle material or materials, e. g. the oil or fat, and the dyes are so chosen that the dye is substantially insoluble in the vehicle. in this solid state by grinding finely powdered dye into the vehicles in the manner that pig-.

ments are so ground into the vehicles of known inks. If and as necessary this ink mixture can.

be thinned somewhat by the addition of thinner substances, inert to the dye but miscible with the vehicle; xylol, toluol, benzol, etc; will serve as examples; these particular thinners do not seem to materially reduce the color strength or tinctorial value, probably because of their volatility. Furthermore, the initial ink mixture can be thickened by adding more of the oil or fat or resin or gum in suitable quantities and proportions; this, however tends to reduce the color strength. i

Preferably I use castor oil thickened with rosin as the vehicle. Having thickened castor oil sufi'iciently with rosin dissolved in the oil with the aid of heat, I grind into this vehicle a finely of capillarity, such solvents act to effect the transfer without noticeable bleeding or blurring The dye can be gotten into the vehicle of the image. Furthermore, the water-insoluble nature of the dye permits, without detriment, the presence of some water in the solvent. Still further, dyes of the character herein indicated, that is to say water-insoluble dyes soluble in alcohol,

present a wide range of fast colors which are insoluble, or soluble only to a very slight degree, in a.

wide range of substances suitable for ink vehicles.

1. An ink consisting-of. a dye substantially in To the contrary, dyes soluble in both water and alcoholare usually not as fast as desirable and I frequently are soluble in' acceptable vehicles to such degree as to produce noticeably blurred :prints. i

While I have referred in terms to the incorporation of but asingle dye in an ink, it is obvious that two or more;dyeslmayfbeiused the same ink. y I

It will be understood that my invention is not limitedtothe detailsabove described except as appears hereinafter in'the claims:

soluble in water but soluble in alcohol, existing i a solid state intermixed with'a substantially'nomdrying vehicle including a substantially non-dry ing oilor fat in which the dye ;is substantially insoluble. o p

2. An ink consisting of a dye substantially soluble in water but soluble in alcoholfexisting in a. q i 'v tate i ter x d th a; vl l i u '7 ing a substantially non-drying animal or vegetable oil or-fat in which the dye is substantially insoluble.

3. An ink consisting of al dye substantially insoluble in water but soluble'in alcohol; existing in a solid state intermixed with'a substantially;

mntd itin Whe s ti b ta t non'f-diy'ingfl oili or fat in-which" the dye; is substantially f'insoluble thickened with an"'a1coho1- solubleresin or gum; I p

: 4. An ink consisting of a dyeisubstantially inv i soluble in water but soluble inalcohol, existing in a solid state intermixed with a vehicle consisting ofi castor o'il ithickened. with an alcohol:- soluble res'in or 5. An-ink consisting of a dye substantially in- 'r-soluble inlwater, but soluble in alcohol, existing -.-=inra solid state intermixed with a vehicle consist? ing of castor oil thickened with rosin.

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