My partner wanted a new leather handbag that was a bit larger than the one her grandfather had made about 4 decades ago, and asked for a particular pattern to be tooled onto it. The tooling on the back panel is done as outlining for the "leaves", where the "leaves" on the flap panel is completely tooled. Colouring is a tan dye and painted on the "leaves", which is two parts, the obvious white and a phosphoresent layer on top, so that it will glow in the dark after being exposed to sunlight. The more light exposure, the longer it will glow, you know the glowing marks on your watch? it's just like that.