Specifications: First Class State Owned manufacturer Noncured air filter paper Long working life Environment protection production Basis Weight: 137-150gsm Width:
Specifications: Butyro-refractometer reading at or refractive index at 40.c:43. 7-52.5; 40.c:1.4550-1.4610 Saponification value: 195-205 Iodine value: 54.62 Unsaponification matter: max