Click here to see the difference between a CD with a white mask and without. The white mask refers to the base we print on the CD. All CDs start silver, we then either print the image directly on the silver surface or we add a white mask (also known as white flood) to make a base. After the white mask is applied we print the colour on top. Having a white mask will be more true to what you see on the screen. Think of it as being similar to printing on white paper, as opposed to printing on the silver surface of the CD, which would be like printing on grey paper.