Single-bath chrome tanning

What is single-bath chrome tanning?

Single-bath chrome tanning is a type of chrome tanning that’s used mainly to tan sole leather. During the 24-hour chrome tanning process, 1.5% of the chromium sulfate is absorbed into the hide, giving it a distinctive green-blue color. Outdoor leather is usually dyed using tanbark (a vegetable tanning method) which gives the leather a tan or light red-brown color. Sole leather’s color is only recognizable in the middle.

Einbadchromgerbung Gusti Leder

What is single-bath chrome-tanned leather like?

A certain pH value, chromium oxide content, basicity, and presence/type of masking need to be adhered to when tanning hides. Particular values for each of these aspects are important for creating a certain type of leather. The tanning agents used in the single-bath chrome tanning process make the leather smoother and more tear-resistant. Soft, smooth hides are the result of using chrome salts to pickle the untreated skins.

Einbadgerbung Chrom Gusti Leder

Single-bath vs. two-bath chrome tanning

The single-bath chrome tanning method was replaced by the two-bath method for a period. However, this method has gone out of fashion as the chromium (IV) compounds used in this process earned a bad reputation because of their toxicity.

Chrom VI Chromgerbung



Sources (May 16, 2023):

  • http://ecoursesonline(dot)iasri(dot)res(dot)in/mod/page/view.php?id=63832#:~:text=In%20single%20bath%20process%2C%20basic,fibres%20by%20interaction%20of%20chemicals.
  • https://www(dot)companyweare(dot)com/2022/05/04/chrome-tanning/
  • https://leatheradvice(dot)com/chrome-tanned-leather/
  • https://www(dot)lederpedia(dot)de/lederarten/unterleder
  • https://en(dot)wikipedia(dot)org/wiki/Tanbark
  • https://link(dot)springer(dot)com/article/10.1007/s10098-005-0277-z 

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