Glass containing lead oxide. Including lead crystal glass, flint optical glass, radiation-proof glass, low-melting glass, delay line glass, high-refractive bead glass, etc. The composition formula of lead glass is: RmOn-PbO-SiO2(B2O3). In the formula, SiO2 (B2O3), namely silicon oxide (boron oxide), is called a network former and is the basic unit that constitutes the glass network structure. RmOn, which stands for metal oxides of alkali, alkaline earth and rare earth metals, is a network modifier that changes the glass network structure and achieves adjusted properties. PbO, or lead oxide, is a characteristic component that imparts basic properties to the glass. With the increase of PbO content, the density, refractive index, dispersion, dielectric constant, absorption coefficient of X-rays and γ-rays and other performance indicators of the glass increased; the hardness, high temperature viscosity, softening temperature, chemical stability and other indicators decreased; As a result, the glass molding material becomes longer, the colorant is brightly colored, the surface gloss increases, and the percussion sound is crisp.