Ready-to-use crystalline glaze that, when fired correctly, creates spectacular, unique crystals on the ceramic surface.

Crystalline glazes are considered one of the more challenging ceramic glazing techniques. Achieving the desired results often requires many trials, an appropriate recipe, and a precisely selected firing curve. KJ Tools & Glazes were created to simplify this process. They are ready to use and applied similarly to standard glazes available on the market.

Key Features

• ready-to-use crystalline glaze,
• designed for brush application,
  
• creates unique crystals during controlled firing,
  
• can be fired in various types of kilns according to the manufacturer's instructions.

Application Method

Before use, the glaze should be thoroughly mixed. The manufacturer recommends applying the glaze in three layers:

1. First layer: apply the glaze to the entire glazed surface of the piece.
2. Second layer: start applying approximately 1/3 of the way up the piece, counting from its base.
3. Third layer: start applying approximately 2/3 of the way up the piece, counting from its base.

Each subsequent brush stroke should overlap the previous one by approximately 50%. This allows for an even layer of glaze.

Do not apply the glaze too thickly or too thinly. Too much glaze can hinder or completely prevent crystal formation. A too-thin layer, on the other hand, may result in poor background coverage and limit the final effect.

Note – Glaze runs significantly

Crystalline glazes are very fluid during firing. Each piece must be fired on a specially prepared glaze catcher or a stand protecting the kiln shelf.

Do not place the glazed piece directly on the shelf. Running glaze can permanently bond the piece to the shelf and damage kiln equipment.

Firing Program for Kilns with Controlled Cooling

1. Heating to 1267°C.
2. Cooling to 1150°C and holding for 45 minutes.
3. Cooling to 1100°C and holding for 30 minutes.
4. Cooling to 1050°C and holding for 20 minutes.
5. Cooling to 1000°C and holding for 20 minutes.
6. Cooling to 960°C and holding for 20 minutes.
7. After the program ends, allow the kiln to cool naturally.

Kilns without Controlled Cooling Function

After reaching 1267°C, allow the kiln to cool naturally to about 1150°C. Then set minimal power and maintain the temperature for 45 minutes. Repeat the process at subsequent temperatures, according to the times given in the firing program.

Manually Controlled Kilns

After reaching 1267°C, the manufacturer recommends allowing the kiln to cool naturally for approximately 30 minutes. Then set low power and maintain a temperature of about 1150°C for 45 minutes. Between subsequent stages, allow the kiln to cool for about 30 minutes, and then perform subsequent holds according to the program.

Manufacturer's Instructions and Videos

Instructions for applying and firing KJ crystalline glazes

KJ Tools & Glazes instructional videos on YouTube

Important Information

The final appearance of the glaze, the size of the crystals, and their distribution may vary depending on the ceramic body used, the thickness of the layer, the placement of the piece in the kiln, and the actual temperature profile.

Before applying the glaze to a finished piece, we recommend conducting a test on the chosen ceramic body. Each kiln and thermocouple may operate slightly differently, so the program may need to be adjusted to the specific conditions of a given workshop.

Product intended for professional ceramic applications. When working, observe workshop safety rules and use appropriate personal protective equipment.