水涂粉工艺由于胶粉比小 ,烤管后残留灰份少 ,所以光通量高、光衰退小。但早先的水涂用粘结剂分子量大、难烤管。如果烤管条件稍差 ,反而光通低、光衰大。后来研制的水涂粉粘结剂分解温度低 ,体现了水涂粉工艺光通高、光衰小的优点 Water-based powder coating process due to small powder, ash residue after baking tube less, so the high luminous flux, light decay small. However, the earlier water-based binder with a large molecular weight was difficult to bake. If the condition of the baking tube is slightly worse, the light flux is low and the light failure is big. Later developed water-soluble powder binder decomposition temperature is low, reflects the water-powder coating technology, high light, the advantages of small light failure