Paste Opaque

Problem / Question

Is the Baking program the same as for Powder Opaque.

Solution / Answer

No, the baking program is totally different. See the Baking Program below (above).

Problem / Question

The paste opaque that was applied over a pre-soldered area became black.

Cause

Solution / Answer

Use solder without Cu, or use Powder opaque or Base Paste BA Paste Opaque.

Problem / Question

Can I use Powder Opaque and Paste Opaque together.

Solution / Answer

Yes, if you first fire the Paste Opaque and then apply the Powder Opaque over it.

Problem / Question

Can I thin the Paste Opaque with distilled water.

Solution / Answer

No, even small amounts of water will cause bubbles. To thin Paste Opaque use Noritake Paste Opaque Liquid.

Problem / Question

What is the purpose of Paste Opaque Base Paste BA?

Solution / Answer

When using semi-precious alloys containing 75-80% palladium or Ni-Cr alloys without Beryllium, use Base Paste (POBA) for the application to prevent greening of the porcelain caused by the copper or Beryllium contained in these alloys.
After POBA is applied, 70% of the metal coping's color should be hidden. Do not mix Base Paste with Paste Opaques. Then bake, referring to the Baking Program. As the second layer of Paste Opaque, apply the desired shade of Paste Opaque to cover the alloy completely. Bake again.

Problem / Question

I am getting bubbles in the paste opaque. How can I prevent this?

Solution / Answer

Follow the recommended baking program exactly.
In addition, if you use a furnace whose drying position is close to muffle, the dry-out temperature may be too high, and liquid of the paste might be boiled before the dry-out. Try lowering the dry-out temperature to 400°C.

Problem / Question

Why do I get cracks when I use the paste opaque?

Solution / Answer

Make sure the baking temperature is appropriate. Follow the recommended baking program for paste opaque.

Problem / Question

When I use the A shade paste opaque, the shade is darker than the shade of powder opaque. How can I improve it?

Solution / Answer

Use B shade Paste opaque or mix it with A shade (for example to make A2, mix A2 and B2).

Problem / Question

When I use the paste opaque, the Body Porcelain does not stick to the opaque.

Solution / Answer (1)

The paste opaque is already glossy and smooth after baking, so excess condensation might be a cause of it.

Solution / Answer (2)

Problem / Question

Is it possible to make the paste opaque schedule shorter?

Solution / Answer

No. It will be a cause of troubles. Follow the recommended baking program exactly.

Problem / Question

Is a wash bake necessary?

Solution / Answer

No. Cover about 70% metal color with the first application.

Problem / Question

To save time, can I all of the paste opaque in one application only once.

Solution / Answer

No, you must bake 2 times. It will be a cause of trouble such as bubbles and cracks due to too thick opaque.