| 摘要 |
Procedure for obtaining air bubbles in hot glass, without blowing. It comprises a series of phases which start with taking the preparation with the pontil, incorporation of colour, modelling of the mass with paper, obtaining a bowl, closing of the opening thereof, reduction of the middle section of the resultant hollow chamber, formation of a ring surrounding the hollow or bubble, transfer to the case, freighting and obtaining of an orifice which communicates with the bubble. The procedure is applicable to the manufacture of bottles.
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