... black paperEquipment specifications:1) Bulk density: 80-400gsm (made by paper machine), above 450gsm (made by veneer)2) Substance: 100gsm ... pulp, 40% broad-leaved wood pulp and 10% Europeanwaste paper 2) PH degree: cold extraction test in TNO (independent ... , 230gsm,250gsm, 280gsm, 300gsm, 350gsm, 400gsm,450gsmInner packing: Kraft paper with filter film 80g-120g, 250pcs/pack150g-230g, 125pcs/pack250g ...