Jasper is a wonderful, glossy copper adventure with welcomed flashes of natural greens and deep reds throughout. With an extra layer or two applied Jasper gleams with glittery flashes.


* Results shown are fired at Cone 6 on B-Mix unless otherwise indicated. Speedball Mid-Fire Glazes are certified dinnerware safe when used according to manufacturer’s directions. Independent testing is recommended when multiple colors are used on a singular piece and/or prior to introducing into commerce.

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We have had an incredibly fun time formulating and testing these glazes to provide you with the most accurate performance data. However, results may vary based on individual application methods and firing techniques. We encourage you to create your own test pieces specific to your own practices to create a visual reference highlighting your unique process. We recommend a normal cooling cycle across all colors to ensure consistent results.

Blackened Copper
Night Shade
Midnight Plum
Blue Tiger's Eye

Where to Buy

Find out where to buy Speedball Mid-fire Glazes and start creating today!