Mayco Specialty: Cobblestone - Black 473ml

About

Cobblestones create a textured “cobbled” surface when fired. Apply over another glaze and during the firing process, a shattered pattern of raised, irregular chips will emerge. The underlying glaze will appear in the cracks. Great for replicating skin patterns and textures of reptiles, spotted animals, and mushrooms. To create colored cobblestone, brush Stroke & Coat® glaze of choice over the white cobblestone and fire.

Cone 06 oxidation: A shattered pattern of raised, irregular chips will emerge. The underlying glaze will appear in the cracks.

Cone 6 oxidation: Glaze will bead up on the surface of the piece. If applied over another glaze the texture flattens with similar cobblestone pattern.

WIDE FIRING RANGE: Cobblestones have been formulated to mature at cone 06/05. However can be fired to higher temperatures to add a unique look. Their performance at cone 6 is noted on each individual product label. We recommend testing on your clay body and in your kiln prior to use.

Available sizes: 4 oz jar and Pint (473ml) jar.

INSTRUCTIONS FOR USE

Shake for 5-6 seconds before use. Dispense glaze onto a palette (tile, plate, etc.) and apply 2 coats with a broad, soft brush, such as a CB-604 #4 Soft Fan Brush. Apply the second coat while the first coat is still damp: do not allow Cobblestone to dry between coats. Pattern break-up is determined by the application direction of the brush stroke. Large break up heavier application, small breakup lighter application. If application is too light the cobblestone will not break up. Reapplying and touching up will not achieve a break up. Fire to shelf cone 06 or higher.

Application thickness, drying time before firing, firing atmosphere and temperature can all affect the fired results you obtain. If cobblestone is applied too heavy you will get a “flip up” down to the bisque. To fix, reapply the base gaze and cobblestone. Pattern will vary from original break up.

Handle the ware carefully as the dried Cobblestone has a tendency to flake off. Pieces of cobblestone that fall off may be reapplied to the ware using AC-302 Wax Resist If cobblestone flakes off and you reapply cobblestone in that area this area will have a different break up pattern A protective coating of AC-302 Wax Resist can be applied over the cobblestone while the cobblestone is still damp to help alleviate the flaking of the product.

Cobblestone glazes are have been certified as Non-Toxic, safe for use by artists of all ages when used according to manufacturer’s directions. However, they are not recommended for dinnerware due to the durability of the fired glaze. Some glazes, regardless of surface texture or porosity of underlying clay body, will be designated as not suitable for dinnerware as the fired glaze surface is not durable and can be impacted by contact with food or liquids. While it may not be harmful, it is certainly not desirable. Further, these glazes exhibit surface textures such as cracks and crevices. While the glazed surface may pass lead & cadmium leach tests, and therefore legally considered Food Safe, attempts to adequately clean the textured surface may cause the underlying porous ware to absorb water and fail. Recommended for ornamental use only.

Click here for Mayco's info on Dinnerware & Food Safety.

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