AMACO CO-8 Dark Star crystalline glaze

AMACO Cosmos Dark Star creates a dark matte surface. Its iridescent crystals shimmer like the bright shell of a nocturnal beetle caught in a beam of light.

Dark Star produces a dark matte surface with iridescent crystals whose sheen recalls a beetle shell. Where the application becomes thinner, the glaze may break translucent. It is highly fluid and develops its fullest effect toward the upper end of the 1200-1240°C range.

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-08 Dark Star Crystalline Glaze

• Creates a dark matte surface with iridescent crystals reminiscent of a shimmering beetle shell.
• May break translucent in thinner areas and develops its fullest effect toward the upper end of the 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.