The pillow is also our close friend in life. It can promote sleep well. Pillows usually have pillowcases. Due to sweating in the head and secretion of some oils and other substances, pillowcases will appear yellow, but also emit odor, making it unbearable. However, how to wash the pillowcase yellow? This is not an easy task! Now, let's take a look at how people in the home teach you how to wash your pillowcase! Home Da people teach you how to wash pillow yellow? For yellow pillowcases, it is best to expose them to one or two hours under the hot sun before cleaning. This will effectively remove yellow marks. After exposure, immediately soak pillowcases, to thoroughly soak the stains on pillowcases, it is best to use warm water or hot water, detergent and other detergents together to soak together for more than an hour. After soaking, whether it is hand washing or machine washing, first wash with detergent, wash away the basic sweat spots. Many laundry detergents are powerless for long-term sweat spots, and detergents and other degreasing abilities, so they are then washed once with detergent and wash away the accumulation of sebum on the pillowcases. At this point, if the stain is still stubborn, find a brush and then use the detergent several times. If the pillowcase material is heat resistant, it can be changed to boiled water without the two-step method. Put the detergent and pillowcase in boiling water for a period of time, then remove it and scrub or use a brush to see the cleansing effect. If you still can't reach the effect, put it in and continue to cook. Repeat until you are satisfied. However, if we face pillowcases that are more stubborn and difficult to clean, we can then rinse them again with white oil. The yellowing effect is very good. It is also possible to dispense with the above steps and clean directly with white oil after exposure. It should be noted that white oil is toxic to the human body. It is best to wear gloves during the cleaning process. After cleaning, the pillowcase must be aired in an open high place for enough time to completely evaporate the white oil. Rinse well with clean water. If the pillowcase is solid or light-colored, and the fabric is dyed firmly and resistant to strong oxidants, then bleaching can be used for bubbling or boiling. This method is most effective and can completely remove yellow. However, care should be taken not to use bleach on pillowcases, fabrics that do not tolerate strong oxidizers, and the pillowcases may be scrapped after bleaching. Those pillowcases with more colors should not be bleached. For pillowcases, we need to clean them regularly because we have bacteria, worms, etc. hidden in our hair. Once we inhale the respiratory tract, it may cause allergies, asthma and other diseases. Home Darby teaches you how to wash your pillowcase yellow, and hopes to bring you some help. Biometrics is mainly used for identity recognition.Due to the rapid popularization of video surveillance, many video surveillance applications are in urgent need of a fast identification technology in the remote and uncoordinated state of users, in order to quickly confirm the identity of personnel from a distance and realize intelligent early warning.Face recognition technology is undoubtedly the best choice. By adopting fast face detection technology,face can be found from the surveillance video image in real time and compared with the face database in real time,so as to realize fast identity recognition. System Biometric Identification Lens,Recording Identification Lens,Lens For Iris Recognition ,Industrial Lens Dongguan Shengqiang Electronic Co.,Ltd , https://www.sqoptical.com