"Striking glasses" change dramatically to reach target colour during firing. Colours may vary, depending on firing schedule, rate, atmosphere, and heat work.
|May react with:
||Light transparent blue to lavender. Striker.
||Strikes to a deep transparent pink in the flame. Work in a cooler, oxidizing atmosphere. May develop a light brown colour on the surface of the glass if worked in the presence of too much propane (or fuel).
||A linear, streaked design may develop upon firing and may be visible whether fired lengthwise or on end. Hue and saturation may also differ slightly when compared to sheet glass; a wider range is accepted due to changes that occur in the forming process.
||Consider encasing with clear to protect the surface from developing a light brown colour in the hotter, neutral flame chemistry that you would use for most other styles.