A new ultraprecision machining technology for potassium dihydrogen phosphate (KDP) crystals, deliquescent polishing
technology for KDP crystals, which utilizes deliquescent effect for ultraprecision machining KDP crystals, is proposed.
The principle and the advantages of technology are introduced. The deliquescent polishing procedure of KDP crystals is
given. The deliquescent polishing experiments of KDP crystals are conducted, and the material removal ratios are
calculated. Through the experiments, the effect of four processing parameters (velocity of polishing plate, velocity of
drip, volume percentage of water in the deliquescent polishing fluid, polishing pressure) on material removal ratio in the
deliquescent polishing of KDP crystals is researched. The plot of material removal ratio versus every processing
parameter in the deliquescent polishing of KDP crystals is obtained, and the rules of material removal ratio in the
deliquescent polishing of KDP crystals are reached.