Up to now quantitative description of the temperature distribution within glass being annealed is very rough and superficial

so that many significant phe nomina can’t be forecasted by it. The application of the finite element solution of heat transfer problems to the determination of the temperature distibution within axisymmetric glass being annealed where the temperature change is slowly has been suggested for the fist time in this paper

and corresponding microcomputer programs is designed to put into effect. In eddition

this paper also describes how to determine the nacessary time to make the glass maitained at the annealing temerature Tg with a microcomputer.