Society of Glass Technology · [Sheffield] · leaf 163
remedied by finishing the inside with knife and leather when thesurface is fairly hard. Care must be exercised when doing this topress in the grog and not drag it into the holes. The first stage … Fig. 7. Fig. 6. Fig. 5. should be the exercise of pressure only. The alternative to thiswould be to fill the mould a second time with slip containing nocoarse grog and to cast a fine surface layer. PREPARATION OF RAW MATERIALS FOR GLASS-HOUSE POTS, 87 An abnormally thick pot or a quicker cast may…
Glass
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