... , lami-nation, foreigh matter, crack of mica paper, reeling out of glass cloth, loosening of tape coiling, etc. 2,Normal Thickness ... Requirement DescriptionunitFigureTensile StrengthN/10mm≥60StiffnessN/mAccording to the negotiation of the supplying party and reguiring partyAir porosityS/100mlShelf lifed180SOME ... tell you the details .So welcome your inquiries! High quality Mica paper tape for VPI use