STRIKING–
Striking colors are glasses that can be 2 different colors. It has to do with the orientation of the molecules inside the glass, which will change from one state to another on being cooled and re-heated. Transparent reds, oranges and yellows and most opaque pinks, for example, are striking colors. Usually, you strike colors at the last step after shaping a bead, by letting the glass cool and reheating it quickly in the flame so that it takes the shade you want it to be. By Henry Grimmett