Are there any special considerations when using polypropylene as covers or dividers in conjunction with litho printed sheets?
Yes, the right kind of litho ink needs to be used as Polypropylene can be distorted by some conventional litho inks. Avoid litho inks with high mineral oil distillates. Vegetable/soya based inks or similar are known to work well. Check with your ink supplier and perform trials if a problem situation is likely to occur. It is also recommended that any litho printed surface in close contact with polypropylene is sealed by film lamination.
