Ask for product photography help (how to make black rubber skin black and black? )

You wrap the object with black cardboard, which can reduce the interference of external objects on the surface of the scene. Then pay attention to the high reflection point of the flash not to be seen at the angle you shoot. It doesn't matter. But objects can't be completely black, because black has no layering and reflection, so what you see is darkness. Only black objects have layering, that is, bright details. Make objects real.