Duro White is a collaborative experiment between Northstar and Gaffer Glass similar to Opaline. This color is a denser formula of Opaline with similar characteristics. This glass is a white with an iridescence blue shimmer. These rods yielded mis-shaped & off round. It is recommended to use a highly oxidizing flame to prevent brown streaks on the surface. Recommended annealing temperature of 1100f-1150f.