To slow down the occurrence of furniture yellowing, we must first know what is causing the yellowing. The white is gradually covered with a yellowish color, which is actually the deterioration of the surface paint. The root causes of the deterioration are the temperature, humidity and ultraviolet rays in the air. Seasonal changes will change temperature and humidity. Summer is hot, winter is cold, spring and summer are humid, and autumn and winter are dry. Such changes in temperature and humidity have a great impact on the paint particles on the surface of furniture. The more the difference is. The greater the impact, the more obvious the change. Gradually the white pigment fades away and becomes yellow particles. At this time, we will see a yellowed surface. Ultraviolet rays have great killing power on all light-colored molecules. In fact, this is because light-colored molecules are easier to detect when they change. Those who have been tanned with white clothes and shoes in summer should know how powerful it is. For white metal dining chair, ultraviolet rays have the same lethality, and can make the office desk change the same as white shoes and clothes. Knowing this, now we know the key to slowing down the yellowing of white furniture, balancing the indoor temperature and humidity, and preventing ultraviolet rays from irradiating the furniture.