Some basic principals you can use to your advantage:
Opaque glass, which is soft, likes to float and spread out over transparent glass, which is stiff. Effetre black is really a transparent glass and works well as a base.
Stiff glass can act like a dam and block soft glass from spreading in certain directions (this is useful for making shapes with your dots, like with harlequin beads). Beware that it will try to seep and creep.
Glass likes to travel towards heat, so position your glass in the flame accordingly.
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Kimberly
working glass since 1990 - melting it on a torch since 2002
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