A light guide plate with triangular micro prisms comprises a smooth surface and a prism surface. In particular, the present invention relates to a method for the production of glass utilizing processes of reacting materials in a glass furnace in either a batch mode or a continuous process. It is possible with the process to recognize implausible measuring results as such on the gas-measuring device without design measures. A shader program is subsequently generated based on the processing of the file to apply the graphics effect to an object. Thereby, there can be provided a graphite heater for producing a single crystal which makes it possible to produce a silicon single crystal with high productivity when the silicon single crystal is pulled in a predetermined defect-free region or a predetermined defect region. Other content blocks come from writes to removable media.