Greasy Glass
Light Blue Raspberry
A light blue rod that strikes to red; preheat tubing before use to prevent thermal shock.
Outcomes
-
light blue (unstruck)The rod starts as a light blue color before striking.
-
red (struck)Strike the glass to develop the red color from the initial light blue state.
Working notes
Preheat / heat slowly
- Always preheat tubing before use to prevent thermal shock.