a glazing including a sheet of glass and a sheet of plastic adhesively fastened thereto is manufactured by assembling into a stack the sheet of glass , the sheet of plastic , a thin flexible protective sheet , and a thick cushion sheet . the stack is enclosed in a bag of rubber or similar flexible material which is evacuated to degas the stack .. the bag with the stack therein is then subjected to heat and pressure in an autoclave to bond together the glass and plastic sheets , whereafter the protective and cushion sheets can be readily separated from the remainder of the stack .