The protective effect of some modified glasses used to protect museum fabrics against photoaging is studied. Spectra for glasses in the visible region of the light spectrum and data on the ultraviolet and infrared radiation transmission are presented. The authors have studied the aging of samples of the fabrics dyed by unstable dyes and exposed to light and radiation from various light sources screened by modified glasses as well as by an ordinary window glass. The results obtained have indicated efficiency of application of modified glasses for the purpose of protecting art fabrics in museums.