Photos from Pintrest
Chrome tanning
During tanning, the chrome links to the collagen which occurs naturally in the hide, changing its molecular structure. This stabilises it and extends its life – well-kept leather will last a lifetime and not start to biodegrade unless it is abandoned.
People are often confused about what type of chromium is used in the process. For tanning, a small amount of chromium (III) is used in the form of chrome mineral salts. This type of chromium is not hazardous to health. In fact, it is one of our dietary requirements, occurring naturally in foods including apples and green peppers. Drinking water is allowed to contain 50 micrograms (chromium III) per litre.
As for the water used in dyeing leather, leather factories worldwide have invested significant time and money in combining technological advancements to achieve effective water purification for the tanning process.
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