Also paper bags can print in offset or silk screen.
Recently used offset, because paper sheets are printed before following treatments.
Silkscreen use for printing already madded bag, if need to print small area (like logo).
Offset can print in one or fully cmyk colors.
Often use kraft or coated paper.
Take note! Using coated paper, it have to cover by glossy or mat cover. It protects color and material from external influences and prevents breakage of paper folding sites.
Kraft paper don’t need lamination.
Colors on coated paper is more lively than on craft paper.