Amaco Cosmos Midfire Brushable Glaze CO-21 Galactic Glacier

CO-21 Galactic Glacier has a light-blue base with crystalline flashes of pink, violet and silver. Its fluid melt creates variation rather than a predictable flat colour.

At a glance

Colour code

CO-21

Range

Amaco Cosmos

Firing

Cone 5–6

Format

Brushable glaze

Jar sizes

472 ml

Colour & firing notes

Allow about 13 mm of clearance above the foot and protect the shelf with a suitable catch tray. Test each new batch before using it on a large piece.

How to apply

• Apply four coats to cone 04 bisque. Keep the inside or back of the form unglazed for the manufacturer’s preferred decorative result.
• A normal medium-speed firing can produce crystals; controlled cooling can increase crystal growth. Test the programme before using it on a finished piece.

Food-contact suitability

Amaco does not recommend Cosmos for food-contact surfaces because of durability. Use for decorative work and keep it away from drinking rims and food-contact areas.

Before glazing a full piece

Fire a test tile on your chosen clay before glazing a full piece. Record the coats, firing cone and cooling programme. Photographs show example fired results; clay colour, kiln atmosphere and application can change the appearance.

Manufacturer & supplier guides

• Amaco colour and firing guide
• CCG product guide

Need help comparing colours? Browse Amaco glazes or contact our Queenstown studio.