Procédé de fabrication de corps moulés vitreux et poreux

摘要

The method of producing a porous vitreous moulding according to the parent case is modified by the additional step of adding to the initial mixture a water-soluble reducing additive. The additive suggested are sugar, molasses, glycerine or glycol in an amount between 1 and 10 gm. per kgm. of solid in the initial mixture.