CH181699A - Process for through-dyeing leather. - Google Patents

Process for through-dyeing leather.

Info

Publication number
CH181699A
CH181699A CH181699DA CH181699A CH 181699 A CH181699 A CH 181699A CH 181699D A CH181699D A CH 181699DA CH 181699 A CH181699 A CH 181699A
Authority
CH
Switzerland
Prior art keywords
leather
reddish
dyeing leather
blue
dyeing
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 CH181699A publication Critical patent/CH181699A/en

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Description

  

  Verfahren zum Durchfärben von Leder.    Es wurde gefunden, dass es gelingt, Leder,  insbesondere Chromleder, vollständig durch  zufärben, wenn man dazu den     rotstichig     blauen Farbstoff aus     diazotierter        2-Äthyl-          i        amino   <B>-</B> 5     -amino-1-methylbenzol-4-sulfonsäure     und     1-Oxynaphthalin-3,8-disulfonsäure    ver  wendet. Die Oberfläche des Leders     wird    fahl       rotstichig    blau, das Innere kräftig blau ge  färbt.  



       Beispiel:     Die neutralisierten Felle werden im Fass  mit 150 bis 200 ö Wasser von G5  C ver  setzt; das Fass wird laufen gelassen und  eine Auflösung des Farbstoffes aus     diazo-          nierter        2-Äthylamino-5-amino-l-methylben-          zol-4-sulfonsäure    und     1-Oxynaphthalin-3,8-          disulfonsäure    durch die hohle Achse zu  gegeben. Im allgemeinen genügen 1 bis     2,%       des auf das Falzgewicht     berechneten    Farb  stoffes, um kräftige     Durchfärbungen    zu er  zielen.

   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 ver  längern.



  Process for through-dyeing leather. It has been found that leather, in particular chrome leather, can be completely colored by using the reddish-tinged blue dye made from diazotized 2-ethyl- i amino <B> - </B> 5 -amino-1-methylbenzene-4- sulfonic acid and 1-oxynaphthalene-3,8-disulfonic acid are used. The surface of the leather turns pale, reddish-tinged blue, the inside a strong blue.



       Example: The neutralized skins are put in a barrel with 150 to 200 ö water of G5 C; the barrel is allowed to run and a solution of the dye made up of diazo- nated 2-ethylamino-5-amino-1-methylbenzene-4-sulfonic acid and 1-oxynaphthalene-3,8-disulfonic acid is added through the hollow shaft. In general, 1 to 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 rotstichig blauen Farbstoff aus diazotierter 2-Äthylamino-5- amino - 1 - methylbenzol - 4 - sulfonsäure und 1-Oxynaphthalin - 3,8 - disulfonsäure verwen det. Die Oberfläche des Leders wird fahl rotstichig blau, das Innere kräftig blau ge färbt. PATENT CLAIM: Process for through-dyeing leather, especially chrome leather, characterized in that the reddish-tinged blue dye made from diazotized 2-ethylamino-5-amino-1-methylbenzene-4-sulfonic acid and 1-oxynaphthalene-3,8-disulfonic acid is used use. The surface of the leather turns pale, reddish-tinged blue, the inside a strong blue.
CH181699D 1933-11-18 1934-11-14 Process for through-dyeing leather. CH181699A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE181699X 1933-11-18
CH179042T 1934-11-14

Publications (1)

Publication Number Publication Date
CH181699A true CH181699A (en) 1935-12-31

Family

ID=25720239

Family Applications (1)

Application Number Title Priority Date Filing Date
CH181699D CH181699A (en) 1933-11-18 1934-11-14 Process for through-dyeing leather.

Country Status (1)

Country Link
CH (1) CH181699A (en)

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