What is gummed paper tape used for?

Gummed paper tape is used to seal corrugated cardboard cartons. Water activates the gummed adhesive which seeps into the interior corrugated layer of the carton and forms a strong bond, becoming part of the carton.

Water-activated tape cannot be used on glossy, printed cardboard cartons as it might be prevented from bonding. Also if a company logo is printed on the carton then Kraft paper water-activated tape is opaque and will obscure the graphics. This can be overcome by printed branding on some paper tapes.