Artist Description by Mike Shelbo:
"The base glass for Amazon Night is a translucent dark green and it is fully packed with silver and other metals.
I love to encase this colour with clear on a piece that will be worked for a couple hours. Reheating the area of Amazon Night in different ways (ex: sharp intense spot heat, or all over) will change the results of the silver trying to emerge through the clear layer. Bursts, streaks, wisps and smooth gradients will appear in all colours of blues, greens, purples, and golden yellow.
When working Amazon Night without encasement, make sure not to overwork in a reducing atmosphere or in an over oxidizing flame to avoid phase separation or scum. Work in as close to a neutral atmosphere as possible until just before putting the piece away, then increase propane in flame and pass piece through flame and watch a chrome like rainbow iridescence build up with different levels of exposure" - Mike Shelbo