确认方法：将封好口的样品从包装开启处缓慢撕开，用肉眼或放大镜观察封口部

Confirmation method: slowly tear off the sealed sample from the opening of the package, observe the sealed part with naked eyes or a magnifying glass, and check the hot melt of the sealed part. <br>Acceptable criteria: The hot-melt channel at the sealing part should be uniform and complete, no leaks should occur, and no packaging material can be torn during the tearing process.

Confirmation method: slowly tear the sealed sample from the opening of the package, observe the sealing area with the naked eye or magnifying glass, and check the hot melt situation at the sealing area.<br>Acceptable standard: the hot melt channel at the sealing site should be uniform and complete, no leakage situation appears, and in the process of tearing can not appear packaging material tearing phenomenon.

Confirmation method: tear the sealed sample slowly from the opening of the package, observe the sealing part with naked eye or magnifying glass, and check the hot melting condition of the sealing part.<br>Acceptable standard: the hot melt channel at the sealing part shall be uniform and complete without leakage, and the packaging material shall not be torn during tearing.<br>