Adding Tannins to leather for Roo process? HELP!

[SOSHorses]

Can someone tell me how to add tannins to leather for the roo process. It was mentioned on another thread that you could do this to aid in the darkening of the leather, but no one mentioned how to do it.

[ChuckBurrows]

Can someone tell me how to add tannins to leather for the roo process. It was mentioned on another thread that you could do this to aid in the darkening of the leather, but no one mentioned how to do it.

Cheap black tea is one of the cheapest and easiest ways - make a VERY strong brew soak apply to the leather (get it WET) then apply the vinegar black......you can also apply the tea again afterwards if need be.......

Then I recommend you use a quick bath of baking soda - 2 tablespoons to a quart of water is plenty - dunk it in the mix and hold for a minute or two at most or apply with a wet sponge.........then rinse with clear water.......This is not so much to neutralize acids, but rather to eliminate any residual smell (if you're mix is aged long enough - at least 2+ weeks and with enough iron added - then you will have little odor anyway - IMO one of the "mistakes" is see is using the mix before it's really ready to use) and to aid in darkening. With this mix of baking soda and water, possibility of alkali burn is virtually non-existent