How to distinguish the quality of grease-proof paper bags
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Three methods:
1. Tearing grease-proof paper bags with stubble is wood pulp paper with high strength, while straw pulp paper or wood pulp with neat tear opening and no stubble has low strength.
2. Hand-rubbing method soaks the paper bag in water for a period of time. After taking it out, rub it with both hands. It shows that the paper is good without wool or rubbing resistance.
3. After firing, the paper quality of paper ash is good, but the paper quality of paper ash is poor.
