One of our most popular cobalt colors, Cobalt-5, 515 provides the artist with a highly saturated, easy to work blue.
Working Tip: Work in neutral flame to avoid reduction (gray streaks).
Artist Description by Mike Shelbo:
"Cobalt-5 is very dense in color concentration, yet not as stiff in workability as Cobalt-6.

Be sure to use a neutral flame with this color as it can be susceptible to over reduction that will leave grey patches or streaks. Cobalt-5 is great for stringers and blown work that will leave you with a true deep cobalt. Sandwich between clear layers and blow out thin for a vibrant and beautiful cobalt blue transparent.

Works nicely, and melts easily into itself with no mark or sign of where glass was added. My favorite Cobalt-5 quality is that it shines through the color when it is brightly back lit." - Mike Shelbo