工厂取得LWG验厂认证证书等级取决于工厂的基础，要结合工厂实际情况去做认证审核，级别越高当然是好的。现在国际的各个认证标准都越来越严格，越早申请对自己也有利。
How is leather made?
Leather making is generally referred to as tanning, but actually has five key operations:
CleaningTanningRetanningMillingFinishingHides and skins that are a waste by-product from the food industry account for 99% of the worlds leather. In a circular economy, transforming this waste into a versatile everyday material is the most responsible thing to do.
What is Vegan Leather?
Vegan leather (sic) does not exist. It is a marketing term and any material that is not of animal origin can be labelled as ‘vegan’.
It is important to realise that the ‘vegan’ tag does not necessarily mean ‘natural’, ‘green’ or ‘sustainable’, nor does it necessarily provide the same wear and durability qualities as real leather.
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What is Chrome tanned leather?
About 75% of leather made today is chrome tanned. The process uses trivalent chromium (Cr III), which is a safe substance that also represents an essential part of our diet with many people taking daily supplements that contain it.
Best practices of chrome tanning use half the chemicals required by other methods and produces effluent content below legal requirements. Chrome tanning produces consistent leathers that can be used or worn year after year without any loss of properties.
什么是铬鞣革？
今天制造的大约 75% 的皮革是铬鞣的。该工艺使用三价铬 (Cr III)，这是一种安全的物质，也是我们饮食中不可或缺的一部分，许多人每天服用含有它的补充剂。
铬鞣的最佳实践使用的化学品是其他方法所需化学品的一半，并且产生的废水含量低于法律要求。铬鞣制出的皮革质量稳定，可以年复一年地使用或穿着，而不会损失任何特性
