Simple distinction between high pressure and low pressure membrane film: High film feel softer, basically no sound when you rub, more shiny; and low-pressure membrane feel rather hard, when you rub will issue a rustling sound Chongqing vest pocket, the relative brightness of some gloomy . Simple distinction between high pressure and low pressure membrane film: High film feel softer, basically no sound when you rub, more shiny; and low-pressure membrane feel rather hard, will issue a rustling sound when rubbed, some brightness relatively gloomy. If you do not add pigment vest bags offer for transparent Chengdu vest pocket, feels somewhat sticky surface, hard shake, low voice, easy to burn a fire, that is, away from the flame extinguished, the flame was green. If you do not add pigment, is transparent, the surface feels somewhat sticky, hard shake, low voice, easy to burn a fire, that is, away from the flame extinguished, the flame was green. If you do not add pigment, is transparent, the surface feels somewhat sticky, hard shake vest bag, deep voice, a fire does not burn easily from the flame that is extinguished, the flame was green. Changzhou vest bag | vest pocket | linking Bin century by linking Bin Xiong Paper Packing Co. century. Xiong Bin-century Paper Packaging Co. (www.sjlbbz.com) strong, credible, Hebei Baoding bag industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead linking Bin century and you work into the brilliant, for a better future!