1,economy 2,high quality 3,comptitive price 4,environmental protection product descriptionThe strength of the plasterboard 80% comes from gypsum protective paper, if no protective paper, plaster core almost no strength. You can have a test, protective paper peels away, with the hand a little hard, gesso block will fracturestandard180g/m2 down paperwidth:1170-1200mmdiameter of paper roll :1100- ...