Here's a helpful guide to understanding What is the difference between leather stain and leather dye?, so you can make the best decision for your needs.
What Is The Difference Between Leather Stain And Leather Dye
Fiebing's Leather Dye 4oz Black - Alcohol Based
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Tandy Leather Eco-Flo Oil Dye 4.4 fl. oz. (130 ml) Black 2615-01
Wax Pull Up Aniline Leather Recoloring Kit
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Eco-Flo 8, 2oz. Bottle Leather Dye Pack 2650-05
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Oil-Based vs. Alcohol-Based Leather Dyes : The Brown Rider
Tandy Leather Eco-Flo Leather Dye 4.4 fl. oz. 132 ml Bison Brown 2600-03
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Fiebing's Pro Dye VS Fiebing's Leather Dyelearn the difference
Fiebing's Professional Oil Dye, Black, 4 oz.