确认方法：根据ASTM F1929:98，采用甲苯胺蓝（0.05﹪）、

Confirmation method: According to ASTM F1929:98, use toluidine blue (0.05%), Triton X-100 (humectant 0.5%), and distilled water 99.45% to configure reagents for dye penetration test. Immerse the packaging bag in the dyeing solution for two minutes to ensure that all hot covers are immersed in the solution. After clamping out the packaging bag with tweezers, wipe clean the dye solution on the outer surface of the packaging bag, tear open the sealing part, and observe whether there is any leakage of dye in the sealing part and the packaging bag. <br>Acceptance criteria: There should be no obvious staining solution entering the sealing part and the packaging bag.

Confirmation method: According to ASTM F1929:98, the dye penetration test was carried out by using toluene blue (0.05%), Qulitong X-100 (moisturizer 0.5%), and distilled water 99.45%. Immerse the bag in a dyeing solution for two minutes to ensure that each hot cover is immersed in the solution. After using tweezers to clip out the bag, wipe the dye solution on the outer surface of the bag clean, tear open the sealing area, observe the sealing area and whether there is dye leakage in the bag.<br>Acceptable standard: no obvious dyeing solution should enter the sealing area and the bag.

Confirmation method: according to ASTM f1929:98, the dye penetration test was carried out with toluidine blue (0.05%), Triton X-100 (humectant 0.5%) and distilled water (99.45%). Immerse the bag in the dyeing solution for two minutes to ensure that all hot surfaces are immersed in the solution. After taking out the packaging bag with tweezers, wipe the dyeing solution on the outer surface of the bag, tear the sealing part, and observe whether there is dye leakage in the sealing part and the packaging bag.<br>Acceptable standard: there should be no obvious dyeing solution entering the sealing part and the packaging bag.<br>