quartz plate's averange value of impurity AlFeCaMgTiCuMnKNaLiCoNi21.320.941.880.290.540.550.050.402.061.66<0.07<0.07 Optical film: Spectral transmission > 90% in the visible range Thermal stability The smoth surface without air bubble and flaw OpalescenceSio2dfSpectral transmission Au 500nm less than 10%SiO2Further processing of trim cuttinngh.closing, bending,pinching,fire poshiled and etc. can be done according to the demand of the customers.