CH181704A - Process for through-dyeing leather. - Google Patents

Process for through-dyeing leather.

Info

Publication number
CH181704A
CH181704A CH181704DA CH181704A CH 181704 A CH181704 A CH 181704A CH 181704D A CH181704D A CH 181704DA CH 181704 A CH181704 A CH 181704A
Authority
CH
Switzerland
Prior art keywords
leather
dyeing leather
dyeing
oxynaphthalene
diazotized
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 CH181704A publication Critical patent/CH181704A/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 vio  letten Farbstoff aus     diazotierter        2,5-Dia-          minobenzol-1.-sulfonsäure    und     8-Amino-l-          oxynaphthalin-3,6-disulfonsäure    verwendet.  Oberfläche und Kern des Leders werden  violett 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  lösung des Farbstoffes aus     diazotierter        2,5-          Diaminobenzol-l-sulfonsäure    und     8-Amino-          1-oxynaphthalin-3,6-disulfonsäure    durch die  hohle Achse zugegeben. Im allgemeinen  genügen 1-2% des auf das Falzgewicht    berechneten Farbstoffes, um kräftige Durch  färbungen 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 Färbedauer  entsprechend zu verlängern.



  Process for through-dyeing leather. It has been found that it is possible to dye leather, in particular chrome leather, completely if one uses the violet dye of diazotized 2,5-diamino-benzene-1-sulfonic acid and 8-amino-l-oxynaphthalene-3,6- disulfonic acid used. The surface and core of the leather are colored purple.



  <I> Example: </I> The neutralized skins are in the barrel with. 150-200% water at 65 C added; the barrel is run and a solution of the dye from diazotized 2,5-diaminobenzene-1-sulfonic acid and 8-amino-1-oxynaphthalene-3,6-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 colorations. 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 violetten Farb stoff aus diazotierter 2,5-Diaminobenzol-l-sul- fonsäure und 8-Amino-l-oxynaphthalin-3,6- disulfonsäure verwendet. Oberfläche und Kern des Leders werden violett gefärbt. PATENT CLAIM: Process for dyeing leather, in particular chrome leather, characterized in that the violet dye from diazotized 2,5-diaminobenzene-l-sulphonic acid and 8-amino-l-oxynaphthalene-3,6-disulphonic acid is used . The surface and core of the leather are colored purple.
CH181704D 1933-11-18 1934-11-14 Process for through-dyeing leather. CH181704A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE181704X 1933-11-18
CH179042T 1934-11-14

Publications (1)

Publication Number Publication Date
CH181704A true CH181704A (en) 1935-12-31

Family

ID=25720244

Family Applications (1)

Application Number Title Priority Date Filing Date
CH181704D CH181704A (en) 1933-11-18 1934-11-14 Process for through-dyeing leather.

Country Status (1)

Country Link
CH (1) CH181704A (en)

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