So I bought a red 5 zip from Yoox and some Saphir black dye solution.
First I scoured the surface with a leather-only cleaner (which gave me terrible headaches).
The first coat of dye resulted in a awful uneven purple color. I was like "oh man, what have i done".
But after the second coating, the color was more of a dark brown with burgundy hues. I liked the result and decided to keep it that way. A third coating would have resulted in a plain black color, but I dont...