AMACO CO-3 Event Horizon crystalline glaze

AMACO Cosmos Event Horizon shifts from blue-violet crystals to a bright golden glow, evoking light bending at the edge of a dark, immense cosmic void.

Event Horizon is a dark, highly fluid glaze whose appearance changes markedly with firing temperature. At about 1200°C it develops large crystals with blue and violet highlights, while at about 1240°C it shifts to a bright gold surface. The transformation recalls light bending at the edge of a cosmic void.

AMACO Cosmos

AMACO Cosmos is a range of highly fluid crystalline glazes for firing between 1200 and 1240°C. In a standard firing, they develop opalescent microcrystalline surfaces with depth, movement, and pronounced variation. No special firing schedule is required. Controlled cooling can, however, encourage more pronounced crystal development.

Brush the glazes onto clean, dry bisque-fired ware in 3-4 generous coats. AMACO recommends four coats for a fuller crystalline effect. These glazes are highly fluid, so stop application approximately 1.5 cm above the foot or use a drip tray to catch runs. To support off-gassing and reduce pinholing and blistering, leave the inside or back of the form unglazed. The final result depends on application thickness, clay body, firing temperature, and cooling cycle, so we recommend firing a test tile.

The glazes are labeled food safe. However, because of the limited durability of the fired surface, AMACO does not recommend them for food-contact surfaces. They are best suited to decorative ceramics, sculpture, tiles, and ceramic jewelry.

Amaco Cosmos CO-03 Event Horizon Crystalline Glaze

• Creates a dark surface with large blue-violet crystals at about 1200°C and a bright gold surface at about 1240°C.
• Its appearance changes markedly across the recommended firing range.
• The crystalline effect develops in a standard firing. Controlled cooling can encourage more pronounced crystal development.
• Apply 3-4 generous coats to bisque-fired ware. AMACO recommends four coats for a fuller effect.
• The glaze is highly fluid - leave approximately 1.5 cm unglazed above the foot and protect the kiln shelf from runs.
• Best suited to decorative ceramics, sculpture, tiles, and ceramic jewelry.
• Labeled food safe, but AMACO does not recommend it for food-contact surfaces because of the limited durability of the fired surface.