WE USE VINEGAROON TO CHANGE THE COLOR OF OUR LEATHER.
Vinegaroon is an ancient method for turning vegetable tanned leather black. It is a solution of iron and vinegar that reacts with the tannins that are present in the leather, changing the chemical composition of the leather. This is difference between vinegaroon and dye: rather than coloring the surface of the leather, like dye, vinegaroon penetrates the leather and changes the chemical composition. If your leather goods happen to get scratched, the underlying leather will also be black.
For our Ink Blot dyed leather, we use a two step process of vinegaroon. First, we splatter the vinegaroon directly onto the natural, vegetable tanned leather. Then we soak it in a diluted bath of vinegaroon to darken the background color.