Chalky

Problem / Question

After glazing there is not enough translucency.

Cause (1)

The High Temp is too low.

Solution / Answer (1)

Adjust the high temp so that the surface is slightly shiny after the first bake.

Cause (2)

The Low Temp is too high.

Solution / Answer (2)

Strictly follow the recommended Baking Program.

Cause (3)

Other manufacturer's forming liquid was used.

Solution / Answer (3)

Use Noritake forming liquid. Other manufacturer's forming liquids have too much organic components.

Cause (4)

The vacuum pump is not working properly.

Solution / Answer (4)

Repair the pump if 72mm (28.4 in) vacuum level is not reached in less than 60 seconds.

Cause (5)

Dirty cleaning solution is contaminating the porcelain surface.

Solution / Answer (5)

Use fresh solution in the ultrasonic cleaner.

Cause (6)

Wet porcelain was applied on top of excessively dry porcelain - preventing complete fusion of the porcelain.

Solution / Answer (6)

Be more careful about moisture control especially during prolonged build-ups.