PACKAGING MATERIAL AND PACKAGING BAG

摘要

A packaging bag (1) where the heat sealing parts of packaging materials (2, 3) having a printed light shielding layer (14) in the layer structure are overlapped and heat sealed, and a sealing state confirming part (8) having a light transmittance higher than that of the other sealing side is provided across one sealing side (11) out of both sealing sides facing each other whe n the heat sealing parts are overlapped. Visual confirmation of incomplete hea t sealing part can thereby be facilitated.