How to identify inferior silicone tubes and inferior latex tubes

First, the identification of inferior silicone tube:
1) Test flexibility
Rubber and latex have good elasticity, and silica gel is relatively fragile. When selecting, you can try elasticity first. If the elasticity is very good, it may be rubber. If the elasticity is not so good, it may be silica gel.
2) Look at the color
Rubber and latex are not transparent because of their high content of impurities. Silica gel is colorless and transparent. Silicone rubber products must be made of transparent silicone rubber.
3) smelling
Rubber and latex products have a strong taste. When you smell it, you will smell pungent. Some manufacturers add flavor to cover up the taste. Therefore, it is much better to choose silicone materials.
Second, the identification of inferior latex tubes:
1) It depends on the feel. The high-quality latex tube is made of natural latex as the main raw material. It is soft, smooth and has no obvious odor. It is not hard in winter, and the inferior latex tube is hard, not soft and has a pungent odor.
2) Look at the appearance of the latex tube. The appearance of the high-quality latex tube is smooth and smooth. The counterfeit goods are rough in appearance and faint in color.
3) Look at the raw materials, the high-quality latex tube is produced according to scientific ingredients, and the elongation can be returned in time, and the elasticity is excellent. The inferior latex tube has a low gel content, is white when stretched, and cannot be returned in time, and is easily broken.
4) Look at the weight, the quality of the latex tube is generally heavier than the inferior quality.