... 18gsm, 20gsm, 21gsm, 22gsm, 23gsm Heat-Seal Tea Bag Filter PaperSPECIFICATIOI. NAME OF PRODUCT:heatsealable filter paper for teabags16.5gsm, 17gsm, 18gsm ... PP fiberIV. Requirement for Product Appearance 1. The surface of paper sheet should be equal and plane.2. The colour should ... even, the density of two edges should be same. The paper core should be without distortion.V. SizeRoll width of our product ...