Have you ever experienced such a scenario? The carefully packed food was spoilt by moisture due to poor sealing. Vacuum bag’s minor defects may cause huge loss to your product quality, brand reputation!   Various factors in the production process of antibacterial vacuum bag may lead to leakage sealing, pressure penetration or cracks and micro holes in the material itself, and the formation of small holes with internal and external connectivity. Especially the fourth layer, is most likely to leak. So it is vital to have serious sealing test before selling. The relevant standards for sealing test are shown in Table 1:   Table 1 Sealing Integrity Test Standards Different test methods exist for sealing integrity evaluation. In domestic practice, GB/T 15171-1994 is commonly used. We normally use The Dye Penetration Method and Water Immersion (Vacuum Method). In the video below, you will see our QC use vacuum pump to test our bag.   HANXHOSA Antibacterial Vacuum Bag has been fully tested in product appearance and product performance, is a high quality product you can trust, welcome to send us inquiries.