Posts: 1
From:Taunton, MA, USA
Registered: Aug 2001

posted 07-08-2001 05:01            

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I am preparing a paper on Tanning and I am hoping some of the experts out there can help me verify some information. I need to know - At what PH ideally does a vegetable extract (like Quebracho) "fix"? What happens if the PH is too high or too low (both scenarios) - and is a vegetable extract considered Anionic or Cationic? I also need the same info concerning an Aldehyde Tanning agent such as BASF's Regulan GTW or Union's Gluteraldehyde. At what PH does it "fix", what happens when the PH is too high or too low, and are they considered Anionic or Cationic.

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