Northstar Glassworks
Midnight
Dark opaque blue that requires an oxidizing flame to prevent graying; heat gently and slowly to avoid boiling.
Outcomes
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dark opaque blueWork in an oxidizing flame to prevent graying. Heat gently and slowly to prevent boiling.
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grayed-out blue (under-oxidized or overheated)A flame that is not sufficiently oxidizing, or overheating the glass, can cause graying — an undesirable result per the prose.
Working notes
Preheat / heat slowly
- Work in an oxidizing flame — neutral or reducing will cause graying.
- Heat gently and slowly to prevent boiling.
- See the Heat Sensitive color section for additional guidance.