White ink and varnish on leather should be planned around the material’s background color, surface finish and movement in the finished product. For a dark leather panel, a white underbase followed by color is a useful starting point. Clear varnish...
A durability acceptance plan for UV-printed leather should define the finished product, the stresses it will encounter, the specimens to test and the failure criteria before testing begins. Evaluate rubbing, repeated flexing and the cleaning or moisture conditions that matter...