To be honest... Back in the day, mine went down an old offal hole. Probably not best practice these days. That's why when I use this bottle up I'm hopefully changing to a style of tanning similar to brain tanning. But I'm still at the experimental stage. I checked the Leder manufacturers websites and it says "DISPOSAL: Dispose of contents/container in accordance with local regulations."
https://www.saddlerytrading.com/stab...58&SearchPos=2
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