Chemically strengthened glass and its manufacturing method

Object of the present invention to provide a soda lime glass even if it is also excellent in the cut, and has a compressive stress as compared to a larger chemical residue conventional reinforced glass. Chemically tempered glass of the present invention is manufactured through a larger ion radius as compared to ion exchange alkali metal ions and the alkali metal B ions in the surface layer A glass article will be a maximum amount of alkali metal A ion contained in the glass replacement the chemically strengthened glass, wherein the glass before ion exchange to soda lime glass, essentially, by mass%, comprising SiO2: 65 ~ 75%, Na2O + K2O: 5 ~ 20%, CaO: 2 ~ 15%, MgO: 0 ~ 10%, Al2O3: 0 ~ 5%, the surface after ion exchange compressive stress of 600 ~ 900MPa, and the glass is formed on the surface of the compressive stress layer depth of 5 20μm ~.