Blue Slyme is a variation on our popular Slyme green: it ranges from transparent where thin or heated more, to translucent with a milky strike where it’s worked cooler. But instead of an ectoplasmic green, this glass is a beautiful light-to-medium blue. Like other Slymes, this glass likes a soft flame, especially when starting cold. We prefer a bushy soft neutral flame with this color. Generally speaking, if you get scuzz on the surface, turn down the oxygen and go a bit slower. If you are getting any graying, turn down the gas a little.