I don’t have an answer but you can rest assured, if the result is not what you had hoped, a little elbow grease and water and you can remove it.Late night nonsense question... What would happen if I applied Black Urad to a brown or burgundy leather? Would the Urad pigment actually dye the leather and create some sort of tea core or would it do nothing? Maybe @Marc mndt or @ton312 , who already played plenty with Urad could chime in and give their thoughts on this, just for fun... (Just plain curiosity, not intending to do nothing like this at this moment)