Vinegaroon mix is brown?

[dikman]

I made a vinegaroon mix several months ago. I decided to use it on a cartridge holder strap and when I poured it into a container it's gone a light muddy brown! I used it anyway and it worked fine on the leather, but I'm curious why it's changed colour in the container (plastic bottle). Anyone have any ideas?

[ffjdh]

I've had some vinegaroon that I've kept in a glass jar for a year or so that has also turned a brownish color.  The mix hasn't seemed to have lost any off its staining power though.

[Northmount]

Rust, oxidation of iron in a moist environment.  Likely used up all the free acid.  Still works as there is iron available to work with tannin in the leather.

Tom

[dikman]

Thanks guys, I wondered whether adding more vinegar would make any difference.