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MGBase7 - Raspberry Cone 6 (Mastering Glazes)

Modified: 2025-12-30 03:29:50

From page 102 in Mastering Glazes book

Notes

While most of the book focuses on earthy, variegated tones, Raspberry provides a vibrant, clean color.

Key Properties
• Visual Appearance: A bright, clean pink to burgundy color. It is a glossy, translucent-to-semi-opaque glaze. 
• The Science: This glaze relies on the Chrome-Tin Pink effect (high calcium, no zinc, and low boron).
• Surface: Smooth and glass-like. It "breaks" clear or white over sharp edges and highlights surface texture by pooling in crevices to create a deeper, more concentrated color. 
• Expansion/Fit: This recipe has the highest thermal expansion of the major glazes in the book. This means it is more prone to crazing (tiny cracks) if the clay body isn't a perfect match.

Likes (Pros)
• Exceptional Color: This recipe delivers a "true" raspberry color that doesn't look like a flat, plastic commercial stain.
• Beautiful on Texture: Because it is translucent, it looks stunning on carved porcelain or white stoneware. It behaves like a "celadon" but in a pink palette.
• Durability: Like all Hesselberth/Roy recipes, it is formulated to be acid-resistant and food-safe.
• Temperature Sensitivity (Bonus Effect): Some potters like that it becomes more matte and "true pink" at Cone 5, while becoming glossier and slightly more purple at a full Cone 6.

Dislikes (Cons)
• Expense: This is the most expensive glaze in the book to mix. It requires a high percentage of Tin Oxide. 
• Crazing Risk: If you use a clay body with low silica, you are almost guaranteed to see crazing over time.
• Fuming/Contamination: Chrome is volatile. If you fire Raspberry next to a white glaze that contains tin, the chrome fume and turn areas of your white pots a faint, accidental pink.
• Clay Body Sensitivity: It looks vibrant on white clay but can look muddy or "dirty" on dark, iron-rich stoneware. It really needs a clean, light canvas to shine.

Related Information

Links

XML to Paste Into Insight-live

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