1. Check whether the sweater pH value item is qualified. The pH value is the safety goal of textiles. The pH value of the human skin surface is weakly acidic. If the pH value is overrun, it will damage the human body’s barrier against disease and simply cause inflammation such as skin itchiness. Parents should pay attention to carefully check the school uniform sweater first. In addition, newly bought sweaters should be washed thoroughly before use. After washing with water, most of the “floating color”, dirt and free formaldehyde remaining in the fabric can be washed away. At the same time, after washing, it can improve the pH overrun of the product and protect the human skin very well.
2. Signing a standardized purchase contract. When customizing sweaters, you should pay attention to choosing a standardized sweater manufacturer. The contract should be more detailed. Together with the sweater manufacturer signing and purchasing, the quality requirements for sweaters should be clearly and detailed in the contract terms. In order to present quality problems, there is a basis for investigating responsibility.
3. See if the sweater has added formaldehyde to the yarn. To save costs, some sweater manufacturers use additives that release formaldehyde in the dyeing or post-cleaning technology of sweaters. Textiles rich in formaldehyde will gradually release free formaldehyde during wear and use, which will damage the human body.
4. Check whether the dyeing is qualified. After the dye falls off and fades, the harmful molecules and heavy metal ions in the dye may be bitten, causing the dye to be directly inhaled into the body and causing damage to health. Therefore, it is necessary to check whether the dyeing of the sweater is qualified!