US722050A - Process of printing cotton. - Google Patents

Description

NNO. 722,050. N i PATENTEIS MANB, 1903V f F. SGHAAB. N

`TROGBNS 0T PRINTING COTTON.

APPLICATION :H LBD JAN. 25, 1902.`

"LIo Konin.

` .ATTORNEYS To all whom, it may concern:

FRANZ SCHAAB, VF TRIER, GERMANY.`

success er Palerme correu.

PECIFICATIO forming part of `Letters Patent No. 722,050, dated March 3, 1963. l Application led January 25,1902. Serial No. 91.252. (No specimens.)

Be it known that l, FRANZ SOHAAB, of Trier,

in the Empire of Germany, haveinyented certain new and useful Improvements in Processes of Printing Cotton Fabrics, 'of which the following is a specification.

This invention relates to an improved process for printing fabrics of cotton or other vegetable iiber in white or colored designs. It was heretofore impossible to produce by the employment ofdyestuffs used in an alkaline Y solution-for example, the socalled sulfur dyesthese effects, for the reason thatthe resists known and/employed did not possess stimulent resistance tojwithstand the continu ons passage through the dye-baths.

Theobject of the present invention is to provide a process by which this diihculty is overcome; and for this purpose the invention consists in printing the fabric with a suitable resist of any common orwelhknown compo- 1' sition--such, for instance, as that hereiuafter described-treating said resist imprinted on the goods with a solution of a suitable alkali, then thoroughly drying the goods, and then dyeing the same in an alkaline bath.

When a resist of the ordinary composition is printed on cotton or other vegetable liber and then subjected tothe action of a solution of an alkali carbonate and subsequently d ried, it is rendered capable ofresisting success` fully the continuous hydrosuliite-soda (hydrosulfit-natron) bath. In place of an alkali carbonate a'caustic-alkali or other alkaline salt, or salts may be used. In. allcases, how-` eveii', it is necessary for the production of an edeftive resist that after the treatment of the resist by the alkaline solution the goods are thoroughly dried. When partly dry or moist,I it does not sufficiently` resist the inzliuence of the bath, and the desired result is not obtained. For the resist a mixture of soluble lead or copper salts, common pipe-clay, lead sulfate, and `a thickeningagent, such as any suitable gum, can be used. In place of the lead or copper salts other salts, such as zinc or manganese salts, may be employed and yield similar resulta After the fabric has been printed by suitable rolls with the resist and treated by splashing thoroughly with the alkaline solution and `the resist is only/H then completely dried the goods are dyediin an alkaline bath in the usual manner withif indigo or other color; protected by the resist appear in clear white The undyed portions and produce clear effects. Before the fabrics;

In place of the White* be produced when the fabrics are passedl after the dyeing `through Ya solution of bichromate of potash.-

In the accompanying drawing, which shows a pieceof goods dyed according to the im 'proved process, c1l a indicate portions pro `tected -hy the resist, and b the portion dyed in the dye-bath. p l

In practically carrying out my improved process the cotton fabric is st printed in y any approved 'manner with a resist, which may bc ofthe following composition :l twenty kilograms of lead sulfate in paste form,twelve and one-half kilograms of lead nitrate, seven and one-half kilograms of sugar oli-lead, three kilograms cuprio sulfate, six liters'cupric ni`I trate, three kilograms alum, three kilograms leiogomme, four kilograms lightly-burned starch, eight kilograms of a solution of suitable gum, an donehalf kilogram tallow. The fabric is dried after printing and then saturated, as by spraying .or splashing, with a concentrated aqueous solution of potash, (specific gravityljt.) Itis then thoroughly dried and then palssed through a dye-bath, which contains, pe one hundred liters, two kilograms of a suitable blue,such est at known as fimmedialblue OR, one klogram sodium sulfd, one-hall kilogram soda- ,lye of 40 Baume, and two kilogram common salts l"Iheffabric is then steamed; if ncoessary, washed, acidified, and dried.:

. It the fabrics are to be dyed alsoinindigo,"

they are not requiredto be washed and acidi fied before dyeing with indigo..` The latter step canrbe accomplished directly in' the 'usual hydrosullit-soda bath;v After thcindigo-'bath is applied to the fabrics they` aref acidied, Washed, and dried. f f

The process described lproduces a blue roo 'ground with White desigms.` It designs in' -a encon claim es new `aand desire to secure by Letters l. The process herein described of printing cotton fabrics, which consists in printing on the fabric a resist 'containing metallic salts, then spraying 'the fabric with a solution of en alkaline carbonate, then thoroughly drying the fabric, then dyeing the same with a sulfur dyeetui, and subsequently dyeing the seme with inigo in an alkaline beth, snbi etentieliy es eet forth. y

2. The process herein described of printing cotton fabrics, which consists in printing on the fabric al resiet containing metallic seits, then spraying the fabric with a solution of an alkaline carbonate, then thoroughly drying the fabric, then yeing the seme with' e sulfur dyestnl in an alkaline bath, then dyeing the saine with indigo in en alkaline bath, and then passing the same through a bichromate solution, substantially as set forth?- ln testimony that I claim the foregoing as my invention l have signed my name in presence of two subecribing Witnesses.

(FRANZ sonerie.

Vitnesnes: t

ADOLPH SIMPLE, CARL, Soni/IWT.

Images