CH181705A - Process for through-dyeing leather. - Google Patents

Process for through-dyeing leather.

Info

Publication number
CH181705A
CH181705A CH181705DA CH181705A CH 181705 A CH181705 A CH 181705A CH 181705D A CH181705D A CH 181705DA CH 181705 A CH181705 A CH 181705A
Authority
CH
Switzerland
Prior art keywords
leather
red
dyeing leather
dyeing
dye
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 CH181705A publication Critical patent/CH181705A/en

Links

Description

  

  Verfahren zum     Dnrehfärben    von Zeder.    Es wurde gefunden, dass es gelingt,       Leder,    insbesondere Chromleder, vollständig  durchzufärben, wenn man dazu den bordeaux  roten Farbstoff     4-Nitro-3'-methyl-4'-äthyl-          amino-1,1'-azobenzol-2,6'-disulfonsäure    ver  wendet. Die Oberfläche des Leders wird  fahl bordeauxrot, das Innere tief braunrot  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     4-Nitro-3'-methyl-4'-          ä.thylamino    -1,1'-     azobenzol-    2, 6'-     disixlfonsäure          clureh    die hohle Achse zugegeben. Im allge  meinen 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 twist dyeing cedar. It has been found that it is possible to dye leather, in particular chrome leather, completely if one uses the burgundy red dye 4-nitro-3'-methyl-4'-ethyl-amino-1,1'-azobenzene-2,6 ' -disulfonic acid is used. The surface of the leather turns pale burgundy, the interior is deep brown-red.



  <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 4-nitro-3'-methyl-4'- Ä.thylamino -1,1'-azobenzene-2, 6'-disixlfonsäure added to 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 move 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 bordeauxroten Farbstoff 4-Nitro-3'-methyl-4'-äthylamino- 1,1'-azobenzol-2,6'-disulfonsäure verwendet. Die Oberfläche des Leders wird fahl bor deauxrot, das Innere tief braunrot gefärbt. PATENT CLAIM: A process for through-dyeing leather, in particular chrome leather, characterized in that the burgundy dye 4-nitro-3'-methyl-4'-ethylamino-1,1'-azobenzene-2,6'-disulfonic acid is used for this purpose. The surface of the leather becomes pale bor deaux red, the interior is colored deep brown-red.
CH181705D 1933-12-07 1934-11-24 Process for through-dyeing leather. CH181705A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE181705X 1933-12-07
CH179043T 1934-11-24

Publications (1)

Publication Number Publication Date
CH181705A true CH181705A (en) 1935-12-31

Family

ID=25720245

Family Applications (1)

Application Number Title Priority Date Filing Date
CH181705D CH181705A (en) 1933-12-07 1934-11-24 Process for through-dyeing leather.

Country Status (1)

Country Link
CH (1) CH181705A (en)

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