Ceramic Surface

Problem / Question

The press ceramic becomes porous.

Cause (1)

Press temperature is either too high or too low.

Solution / Answer (1)

Observe the specified temperature.

Cause (2)

Preheating temperature of the investment ring is either too high or too low.

Solution / Answer (2)

Observe the specified temperature.

Cause (3)

The burn-out furnace is dirty.

Solution / Answer (3)

Clean the furnace and remove the remaining dusts.

Cause (4)

Wax that cannot be burnt out completely has been used.

Solution / Answer (4)

Always use new wax that does not contain impurities and burns out without leaving ashes and other residues.

Problem / Question

The pressed ceramic has black spots.

Cause (1)

Wax has not been burned enough. More than one investment have been heated at the same time.

Solution / Answer (1)

Holding time at 850°C(1562°F) should be more than 45minutes for one-100 g ring and more than 60 minutes for one-200g. When more than one ring is used, add 15minutes for additional ring. For example, for 2-100g rings, holding time should be 45 min. + 15 min. = 60 minutes. For 2-200g rings, holding time should be 60 min. + 15 min = 75 minutes.

Cause (2)

The press ceramic has been heated with other items. Wax that cannot be burned completely has been used.

Solution / Answer (2)

Do not burn rings with other items.
(e.g. soldering models, casting rings etc. )
Always use the new wax that does not contain impure materials.

Cause (3)

The burn-out furnace is dirty.

Solution / Answer (3)

Clean the furnace and remove the remaining dusts.

Cause (4)

The tweezer used to hold the plunger is dirty.

Solution / Answer (4)

Ensure to use clean tweezer, ring former and plungers, etc.

Cause (5)

The investment ring has foreign materials.

Solution / Answer (5)

Ensure that foreign materials are not attached or mixed to the investment ring.

Problem / Question

The porcelain has bubbles after glaze baking.

Cause (1)

Removal of the investment attached to the press ceramic is not enough.

Solution / Answer (1)

Remove the investment attached to the press ceramic completely with alumina sandblasting.

Cause (2)

The grease from the hand has been attached to the press ceramic.

Solution / Answer (2)

Before layering CZR porcelain or before glaze application for H-ingot, clean the press ceramic in an acetone solution with the ultrasonic cleaner and wipe off the grease with a steam cleaner.

Cause (3)

Other manufacturer's porcelain has been used.

Solution / Answer (3)

Use only CZR porcelain.

Cause (4)

The CZR PRESS Glaze thickness on H-ingot is too thick.

Solution / Answer (4)

Apply the CZR PRESS Glaze evenly over the restoration in a 0.2 mm thickness.

Problem / Question

Glossiness is not enough after using CZR PRESS Glaze Powder.

Cause (1)

Baking schedule is not proper.

Solution / Answer (1)

Observe the specified baking schedule.

Cause (2)

IS liquid has not been used. The application of the mixture with glazing powder is too thin.

Solution / Answer (2)

Mix IS liquid with CZR Press Glaze Powder to create a cold-honey like glaze paste. Apply the paste liberally and evenly over the restoration in a 0.2mm thickness.

Cause (3)

Glazing has been performed only once.

Solution / Answer (3)

Glazing should be done twice.