Description
Key Features and Usage
Aesthetic Effect: The primary purpose is to produce a network of fine cracks (crazing) that gives pottery a vintage or antiqued appeal.
Firing Range: They are formulated to be fired at a low temperature, specifically Cone 06, on Cone 04 bisque.
Highlighting Cracks: After firing, the crackle pattern can be accentuated by wiping a non-fired product like acrylic paint or ink over the ware and wiping it off, allowing the color to fill the cracks.
Transparency: The glazes are transparent, allowing underlying designs made with products like Mayco Stroke & Coat® or Foundations® underglazes to show through.
Application
Shake the product well.
Apply three coats using a soft brush to properly fired Cone 04 bisque.
Allow each coat to dry before applying the next.
Compatibility: They are compatible with lusters such as gold and mother of pearl.
Food Safety: The glazes are non-toxic (with some specific color exceptions that have a CL health caution label, such as CC-108 China Sea) when used as directed. However, the cracked surface is difficult to clean thoroughly, so they are recommended for ornamental use only and not for functional dinnerware.
Inducing Cracking: The crackle effect is essentially a controlled firing defect where the glaze shrinks more than the clay body. To encourage cracking after firing, the ware can be subjected to thermal shock, such as by removing it from the kiln as it cools or lightly spritzing it with water.
Mayco also offers a separate line of Stoneware Crackle glazes (e.g., SW-149 Crackle White) that are designed for mid-range to high-fire temperatures (Cone 5-10) and produce a finer crackle pattern at those temperatures.
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