I am submitting art to be offset printed on aerosol cans and plastic tubes. It uses 2 PMS colours. One plate is a 100% flood. The other one is a linear gradient from 0% to 100%. The gradient is to be overprinted on the 100% flood. The maximum density will be 200%. This is the way the boxes are printed, and it looks great.
Can overprint be used on metal containers (aerosol cans) or plastic tubes? Since the material is way less absorbent than paper, I am worried that the ink might start moving around if the density is too high.
I know I can ask my manufacturer, and I did, but they are in China and, although they are a very seasoned manufacturer, I am having a hard time communicating the overprint concept to them. I was wondering if it is because it is not possible to use overprint on these materials, so nobody ever asks for it.