Mayco Stoneware SW-404 Black Mudcrack glaze, 473 ml

Mayco Stoneware SW-404 Black Mudcrack – black texture glaze with a cracked surface

Mayco Stoneware SW-404 Black Mudcrack is a black stoneware glaze that forms a raised, cracked surface when fired. The thicker you apply it, the more pronounced the texture. That way you decide for yourself whether the surface is only lightly textured or distinctly fissured.

The firing range is cone 5–10 (approx. 1,200–1,300 °C). At cone 6 (approx. 1,222 °C, guide value per Orton chart) in an oxidation firing, Black Mudcrack shows its pronounced texture. At cone 10 (approx. 1,285 °C, guide value per Orton chart) in a reduction firing, the texture becomes flatter and the colour stays black.

Application and firing

The texture depends directly on the thickness of the layer. If you only want a light texture, apply it thinner; for strong, fissured cracks, apply it thicker. Mayco expressly advises not to spray the glaze. It is applied with a brush.

• Stir the glaze well before applying
• Apply with a brush, do not spray
• Compare a thin and a thick application on a test tile made from your own clay before glazing a piece
• Oxidation firing (cone 6) for pronounced texture, reduction firing (cone 10) for flatter texture

What Black Mudcrack is suited to

The textured surface suits decorative objects, sculptures and vessels that do not come into contact with food. Do not use it for cups, plates or other everyday ceramics, as it is not dinnerware safe according to Mayco. The light counterpart in the series is White Mudcrack (SW-403).

Mayco Stoneware SW-404 Black Mudcrack product details

• Manufacturer: Mayco, Stoneware series
• Manufacturer's article number: SW-404
• Colour: Black Mudcrack (black)
• Effect: raised, cracked texture
• Contents: 473 ml (16 fl oz)
• Firing range: cone 5–10 (approx. 1,200–1,300 °C)
• Oxidation firing: cone 6 (approx. 1,222 °C, guide value per Orton chart), pronounced texture
• Reduction firing: cone 10 (approx. 1,285 °C, guide value per Orton chart), flatter texture, colour stays black
• Seal: ACMI AP (Approved Product)
• Not dinnerware safe (Not Dinnerware Safe)

You will also need: brush for application, kiln for the stoneware firing

Not suitable for dinnerware or food contact (Not Dinnerware Safe). Do not spray (Do not spray apply). According to ACMI, the ACMI AP (Approved Product) seal means: exempt from hazard labelling. Further safety information can be found in the safety data sheet on MaycoColors.com.