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Modified: 2025-12-31 04:11:08
From page 102 in Mastering Glazes book
| Material | Amount |
|---|---|
| Whiting | 20.00 |
| Nepheline Syenite | 18.00 |
| Ferro Frit 3134 | 14.00 |
| OM-4 Ball Clay | 18.00 |
| Silica | 30.00 |
| Added | |
| Tin Oxide | 7.50 |
| Chrome oxide | 0.20 |
| 107.70 | |
While most of the Mastering Glazes book focuses on earthy, variegated tones, Raspberry provides a vibrant, clean color.
Key Properties
• Visual Appearance: A bright pink to burgundy color. It is a glossy and translucent-to-semi-opaque.
• 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 in 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 on bodies having lower thermal expansions.
Likes (Pros)
• Exceptional Color: A true raspberry color (without the flat plastic appearance common with commercial stains).
• Beautiful on Texture: Because it is translucent, it looks best on carved porcelain or white stoneware. Some describe it as a "celadon" with a pink palette.
• Durability: Like all Hesselberth/Roy recipes, acid-resistance and food-safety are priorities.
• Temperature Sensitivity: It fires 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 (because it requires such 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 can turn areas of the 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 needs a clean, light canvas to shine.
| Firing Schedules |
Mastering Glazes Cone 6
Six-step with controlled drops to 1000C and 760C |
| Typecodes |
Recipes from Mastering Glazes Book
Descriptions of these glazes often contain marketing terms over-the-top adjectives like “scientifically formulated”, “perfect”, “exceptional”, “beautifully”, “engineered”, “specifically designed”, “sophisticated”, “flying colors”, etc. Of course there are no perfect recipes to be discovered, they all inhabit spaces balancing a dozen different properties, tuning one most often affects one or more of the others. And, recipe is only one thing affecting the finished product, process factors can have even more influence on finished appearance and properties. |
| Typecodes |
Medium Temperature Glaze Recipes
Normally fired at cone 5-7 in electric kilns. |
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