Hangzhou Shalom EO offers the SP122 series plastic scintillators, which are used for α-ray detection, a ZnS(Ag) layer are painted on the surface of Poly Methyl Methacrylate (PMMA) plastic materials, ZnS(Ag) are used as the scintillation materials. The usual thickness of ZnS(Ag) is 4.5mg/cm2 and the common thickness of PMMA is between 0.1mm to 10mm. SP122 plastic scintillators can be made into large area, size up to 1000x1000mm is available. An advanced and sophisticated processing are used to make the ZnS(Ag) painting, which makes the final scintilators has an excellent homogeneity and uniformity.