CH181706A - Process for through-dyeing leather. - Google Patents

Process for through-dyeing leather.

Info

Publication number
CH181706A
CH181706A CH181706DA CH181706A CH 181706 A CH181706 A CH 181706A CH 181706D A CH181706D A CH 181706DA CH 181706 A CH181706 A CH 181706A
Authority
CH
Switzerland
Prior art keywords
leather
dyeing leather
yellow
dyeing
nitro
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH181706A publication Critical patent/CH181706A/en

Links

Description

  

  Verfahren     zum        Durchfärben    von Leder.    Es wurde gefunden,     dass    es gelingt,  Leder, insbesondere Chromleder, vollständig  durchzufärben, wenn man dazu den gelben  Farbstoff     3-Nitro-3'-methyl-4'-äthylamino-          l,l'-azobenzol-6,6'-disulfonsäure    verwendet.  Die Oberfläche des Leders wird fahl gelb,  das Innere tief .bräunlich gelb gefärbt.

      <I>Beispiel:</I>    Die neutralisierten Felle werden     iin    Fass  mit     150-200%    Wasser von 65   C versetzt;       (las    Fass wird laufen gelassen und eine Auf  lösung des Farbstoffes     3-Nitro-3'-methyl-4'-          iithylamino-1,1'-azobenzol-6,6'-disulfonsäure     durch die hohle Achse zugegeben. Im     allge-          ineinc,n    genügen 1-2 % des auf das Falz-         gewicht    berechneten Farbstoffes, um kräf  tige     Durchfärbungen    zu erzielen. Nach 45  Minuten setzt man den     Fatliquor    zu und be  wegt weitere 45 Minuten.

   Handelt es sich  um sehr schwere Häute, so ist die Färbe  dauer entsprechend zu     verlängern.  



  Process for through-dyeing leather. It has been found that leather, in particular chrome leather, can be completely dyed if the yellow dye 3-nitro-3'-methyl-4'-ethylamino-l, l'-azobenzene-6,6'-disulfonic acid is used . The surface of the leather turns pale yellow, the inside a deep brownish yellow color.

      <I> Example: </I> The neutralized skins are mixed with 150-200% water at 65 C in a barrel; (The barrel is allowed to run and a solution of the dye 3-nitro-3'-methyl-4'-iithylamino-1,1'-azobenzene-6,6'-disulfonic acid is added through the hollow axis. In general, 1-2% of the dye calculated on the shaved weight is sufficient to achieve strong staining.After 45 minutes, the fat liquor is added and agitated for another 45 minutes.

   If the hides are very heavy, the dyeing time must be extended accordingly.

Claims (1)

PATENTANSPRUCH: Verfahren zum Durchfärben von Leder, insbesondere Chromleder, dadurch gekenn zeichnet, dass man dazu den gelben Farb stoff 3-Nitro-3'-methyl-4'-äthylamino-1,1'- :tzobenzol-6,6'-disulfonsäure verwendet. Die Oberfläche des Leders wird fahl gelb, das Innere tief bräunlich gelb gefärbt. PATENT CLAIM: Process for dyeing leather, in particular chrome leather, characterized in that one uses the yellow dye 3-nitro-3'-methyl-4'-ethylamino-1,1'-: tzobenzene-6,6'-disulfonic acid used. The surface of the leather turns pale yellow, the inside a deep brownish yellow.
CH181706D 1933-12-07 1934-11-24 Process for through-dyeing leather. CH181706A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE181706X 1933-12-07
CH179043T 1934-11-24

Publications (1)

Publication Number Publication Date
CH181706A true CH181706A (en) 1935-12-31

Family

ID=25720246

Family Applications (1)

Application Number Title Priority Date Filing Date
CH181706D CH181706A (en) 1933-12-07 1934-11-24 Process for through-dyeing leather.

Country Status (1)

Country Link
CH (1) CH181706A (en)

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