High Fire Glazes

Types of Glazes for Ceramics
Creativity is greatly expressed in the making of ceramics. One of the most important parts of making ceramics is deciding on the type of glaze to use. There are many different glazes that can be used for varied applications.

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Amaco Arroya Lead-Free Glazes	Amaco Celebration Lead-Free High Fire Glazes	Amaco Lead-Free Raku Glazes	Amaco Pompeian Ash Lead-Free High Fire Glazes
Price: $4	Price: $13	Price: $11	Price: $14
Brand: Amaco	Brand: Amaco	Brand: Amaco	Brand: Amaco
Arroya glazes are textured, producing a unique carved effect when fired.	This is a beautiful group of bright and pastel colors for creating stoneware pieces that are as colorful as earthenware.	These liquid Raku glazes are lead-free and formulated to create dazzling effects and varied surfaces on non-functional pottery and sculpture.	These unique Pompeian Ash glazes produce a wiggly pattern as they flow on the piece, similar to ash glazes fired at Cone 10.


Amaco Potter's Choice Glazes	Amaco Sahara High Fire Glazes	Classroom Pack 3, Set of 6	Classroom Pack 4, Set of 6
Price: $7 - $8	Price: $8 - $9	Price: $49	Price: $49
Brand: Amaco	Brand: Amaco	Brand: Amaco	Brand: Amaco
Amaco Potter’s Choice glazes achieve the effects of Cone 10 reduction without the need for a reduction gas kiln or firing to high temperatures.	Amaco Sahara High Fire Cone 5 (2167°F, 1186°C) Glazes are compounded to match porcelain and stoneware bodies.	Includes one pint each of PC-12 Blue Midnight, PC-27 Tourmaline , PC-29 Deep Olive Speckle, PC-34 Light Sepia, PC-37 Smoked Sienna, and PC-52 Deep Sienna Speckle.	Includes one pint each of PC-23 Indigo Float, PC-28 Frosted Turquoise, PC-33 Iron Lustre, PC-39 Umber Float, PC-43 Toasted Sage, and PC-59 Deep Firebrick.


Decorating Color Set #1	Decorating Color Set #2	Decorating Color Set #3	Mayco Crystalite Glazes
Price: $55	Price: $37 - $55	Price: $55	Price: $16
Brand: Amaco	Brand: Amaco	Brand: Amaco	Brand: Mayco
This set is available with twelve 2 oz plastic jars, or twelve 16 oz plastic jars.	This set is available with twelve 2 oz plastic jars, or twelve 16 oz plastic jars.	This set is available with twelve 2 oz plastic jars, or twelve 16 oz plastic jars.	Gorgeous crystal glazes in a non-toxic formula are ideally suited to schools and institutions.

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In the following, several different glazes are briefly discussed.

Fritted and Raw

Raw glaze consists of synthetic and natural compounds such as clays and quartz. These are melted in a suspension that is water based. Raw glazes oxidize when they are fired.
Fritted glaze is made of glass pieces that have been melted down. Fritted glazes give more color and add texture.

Low, Mid or High Fire Glazes

Low fire glaze can be fired in a kiln at temperatures of up to nearly 2100 degrees F. It produces colors that are vibrant and bright.
Medium fire glaze can be kiln fired at temperatures ranging from 2150 to 2250 degrees F. Once oxidized, medium fire glaze is less vibrant in color.
High fire glaze can be fired at up to 2500 degrees F in a kiln. This type of glaze is mostly transparent and very light. It may take several coats to reach a desired richer color.

Over Glaze and Under Glaze

Over glaze is mainly used for accents and decorations over glazes. These are applied after firing. Over glaze is a low fire glaze. It makes very nice and bright colors after firing.
Under glaze creates base color for pottery. It can be used as background coating for added decoration. Many times, under glaze is coated with transparent glaze and fired again. This helps to give a consistent texture and color to the piece.