Dye leather before soaking and baking?

[Eriksen]

I want to make a sheath like the picture is showing in this link. This will be my first try and I need to know how I make that kind of dyeing with that combination of different colours. And is it adviceable to do it before or after soaking and baking?

 

[Horsewright]

Can't help ya with the dyeing and achieving the different colors. However, when I was doing dyeing I did that after the baking process.

 

[anvilring]