"Reverse Dye" Tooling - Impressions Remain Natural Color in How Do I Do That? Posted December 23, 2021 · Report reply On 11/19/2021 at 11:21 PM, RiverCity said: Block dying is the correct answer, but you dont need a block. I use a piece of tshirt (I buy tshirt rags by the box/lbs) folded over a few times, and go very lightly from there. The main trick is, you need to get most of the dye off the cotton before you touch leather. So have another piece of cloth there to blot off excess dye. Another tip is to make sure your impressions are clear and deep. Another tip on the stamping. Wet the leather and then stamp. Do not case the leather, do not wait for it to lighten in color. Stamp when it is too wet. The reason for this is to avoid the stamp burnishing the impression as best as possible. It will stay pretty much the color of the hide. Here you can see the difference in appearance on a light brown (the burnish from the stamping is close in color), black, and a medium brown. Hope this helps. What exactly is the hardware you've used to tack the lid to the wood block? Those small button head nails... are they upholstery tacks?