How to simply judge the quality of canvas?

In the past, many canvas manufacturers did not have standardized testing standards for their own canvas products, and could only judge the quality of canvas based on experience. For example, the abrasion resistance of canvas is judged by its feel and appearance. The quality of the canvas is evaluated by the thickness of the canvas. These are actually wrong methods, because each person's judgment method is different, and each person's ability is also different. Such a judgment is rather one-sided. At present, the quality of canvas is inspected in the textile testing center. Professional equipment is used to test the weight, color fastness, tear strength, abrasion resistance, etc. of canvas. We have summarized some methods to test the quality of canvas through smell and appearance. 1. Odor: Whether there is a pungent odor, if there is a pungent odor, the coating and waterproof materials are poor and not wear-resistant. 2. Waterproof: It can be realized by hanging water to see if there is any water leakage within 24 hours. 3. Tear load: tear strength needs to be tested by professional tensile testing equipment; manual tearing and observation of the tear opening can only judge the quality of the coating material, the tear opening is uneven, the surrounding wrinkles are severe, and the exposed length of the yarn (except industrial yarn) If the difference is different, it means that the adhesion between the coating and the yarn is poor, and the coating material must be poor, not wear-resistant, and easy to age.