CH181709A - Process for through-dyeing leather. - Google Patents

Process for through-dyeing leather.

Info

Publication number
CH181709A
CH181709A CH181709DA CH181709A CH 181709 A CH181709 A CH 181709A CH 181709D A CH181709D A CH 181709DA CH 181709 A CH181709 A CH 181709A
Authority
CH
Switzerland
Prior art keywords
leather
dyeing leather
brownish
methyl
orange
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 CH181709A publication Critical patent/CH181709A/en

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Description

  

  Verfahren zum     Durchfärben    von Leder.    Es     wurde    gefunden, dass es gelingt,  Leder, insbesondere Chromleder, vollständig  durchzufärben, wenn man dazu den bräun  lich orangen Farbstoff 2-Nitro-4-methyl-3'       metliyl-2',4'-diamino-1,1'-azobenzol-6'-sulfon-          säure    verwendet. Die Oberfläche des Leders  wird bräunlich orange, das Innere kräftig  braunorange gefärbt.  



  <I>Beispiel:</I>  Die neutralisierten Felle werden im Fass  mit     150-200%    Wasser von 65   C versetzt;  das Fass wird laufen gelassen und eine Auf  Msung des Farbstoffes 2-Nitro-4-methyl-3'       iiiethyl-2',9-diamino-1.1'-azobenzol-6'-sulfon-          s        -:        ure        durch        die        hohle        Achse        zugegeben.     



  Im allgemeinen genügen 1-2% des auf das    Falzgewicht berechneten Farbstoffes, um  kräftige     Durchfärbungen    zu erzielen. Nach  45 Minuten setzt man den     Fatliquor    zu und  bewegt 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 colored if one uses the brownish orange dye 2-nitro-4-methyl-3'metliyl-2 ', 4'-diamino-1,1'-azobenzene -6'-sulfonic acid used. The surface of the leather turns brownish orange, the inside a strong brownish orange.



  <I> Example: </I> The neutralized skins are mixed with 150-200% water at 65 C in the barrel; the barrel is allowed to run and a solution of the dye 2-nitro-4-methyl-3'-diethyl-2 ', 9-diamino-1,1'-azobenzene-6'-sulfonic acid is added through the hollow axis.



  In general, 1-2% of the dye calculated on the shaved weight is sufficient to achieve strong through-coloring. After 45 minutes, add the fat liquor and stir 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 bräunlich orangen Farbstoff 2 - Nitro - 4 - methyl - 3' methyl-2',4'-diamino-l,l'-azobenzol-6'-sulfon- säure verwendet. Die Oberfläche des Leders wird bräunlich orange, das Innere kräftig braunorange gefärbt. PATENT CLAIM: A method for dyeing leather, in particular chrome leather, characterized in that the brownish-orange dye 2 - nitro - 4 - methyl - 3 'methyl-2', 4'-diamino-l, l'-azobenzene-6 is used '-sulfonic acid used. The surface of the leather turns brownish orange, the inside a strong brownish orange.
CH181709D 1933-12-07 1934-11-24 Process for through-dyeing leather. CH181709A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE181709X 1933-12-07
CH179043T 1934-11-24

Publications (1)

Publication Number Publication Date
CH181709A true CH181709A (en) 1935-12-31

Family

ID=25720249

Family Applications (1)

Application Number Title Priority Date Filing Date
CH181709D CH181709A (en) 1933-12-07 1934-11-24 Process for through-dyeing leather.

Country Status (1)

Country Link
CH (1) CH181709A (en)

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