The colours that would change most are the striking (change colour when exposed to heat - mostly transparent reds and oranges) and/or opalino (translucent) colours. Most of the pastel and non-strking transparents stay the same, although metal-rich colours like turquoise might sometimes gain or lose reduction effects on the surface. Striking colours might go deeper and opalinos would become more opaque. Hope this helps! I'm sure some people can add more detailed observations here as well. -H.
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