Since the word "black heart cotton" entered the bedding industry a few years ago, it has attracted the attention of many consumers. When buying bedding and quilts, experts reminded the four major tricks to identify "black heart cotton" products. It is understood that black cotton mainly refers to the use of fibrous products such as fibrous industrial waste, medical fiber waste, waste clothing and other waste fiber products that do not meet the relevant national standards. The use of black heart cotton can cause serious harm to the human body: short cotton wool in black cotton has exceeded the standard, and it is easy to penetrate the cotton product fabric and float in the air. It may induce respiratory diseases such as asthma after inhalation by the human body; cotton products made from fibrous industrial waste Because it has not been strictly disinfected, it is likely to become a hotbed of bacteria, which can lead to skin ailments such as psoriasis after skin contact. Experts say that consumers can generally use four methods to distinguish whether the purchased quilts, etc. use black cotton: One is the eye. In general, black cotton has a color that is not pure and has impurities, even yarn ends or rags; and high-quality cotton is white and has no excessive dust. The second is the nose. High-quality cotton does not have a pungent odor when burned; while black cotton is bleached during processing, it has a slight sour taste when smelled, and it has a distinct pungent odor when burned. The third is the hand touch. High-quality cotton is soft and elastic, while black cotton has a rough and inelastic feel. The fourth is tearing. In general, black cotton is torn off, while high-quality cotton is not easy to tear.