TROUBLESHOOTING

PC- 10 June Bug

June Bug is a specialty glaze that can give dramatic metallic crystalline results when used correctly. Below find suggestions for the best results.
 

HOW IT WORKS:

June Bug is a glossy, dark green metallic glaze that develops small triangular iridescent crystals, like the wings of a beetle. This opaque glaze does not break over texture. For best results apply three even brush coats.  

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LET'S FIGURE OUT WHAT'S WRONG.

STILL NOT GETTING ACCURATE RESULTS? LET'S TALK BISQUE

#1 APPLICATION

Thickness of application can affect the appearance of the metallic glaze. If the glaze is translucent or dark with no crystal growth it may be too thin.

 
 

#2 BISQUE TEMPERATURE

The temperature to which your ware was bisqued can have an affect on the final piece. We recommend a bisque between cone 08 and cone 03, though a bisque as low as cone 010 will work.

LETS TALK CLAY BODIES

 

#3 CLAY BODY

The metallics do best on a clay body that isn’t fully vitrified in the glaze firing. Clay body color doesn’t seem to make a difference. 

LETS EVALUATE FIRING TEMPS

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#4 FIRING TEMPERATURE

The metallics do best at cone 6 but should be lovely even at cone 5.

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STILL NOT RIGHT? TRY A DIFFERENT FIRING SCHEDULE.

Cone 5
Cone 6
 

#5 FIRING SCHEDULE

Most of our firings are done on a medium speed with no hold and no slow cooling schedule. We tested two alternate firings and found they reduced blistering in problem combinations.

Alternate Firing 1: long hold

Using the regular cone fire program (medium speed) we programmed a cone 5 firing with a 20-minute hold, giving a cone 6 (cone 6 was bent to 3 o'clock).

 

Alternate Firing 2: slow ramp/hold with drop hold

Popularized by Camille Hoffman, this program was created by Skutt to reduce pinholing and blisters.

 
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MAYBE YOUR LINER GLAZE IS THE CULPRIT??

#6 LINER GLAZE

The liner glaze can affect metallic glazes. Our testing shows HF-9 Zinc-Free Clear has low interaction.

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PC - 24
C - 40
 

STILL NOT GETTING ACCURATE RESULTS?

Contact the AMACO Brent Technical Support Team below:

EMAIL: customercare@amaco.com
TOLL FREE: (800) 999-5456
LOCAL: (317) 683-1303