Glazes can be classified into two simple groups, which are earthenware and stoneware. These groups can also be classified by firing ranges for individual glazes. Earthenware glazes mature in the range 950°C to 1190°C, where as stoneware glazes fire in the range 1200-1300°C. Some crossover can occur between the high earthenware and low stoneware temperatures. For ease of selection sub-groups are arranged within these groups based on temperatures ranges. Other methods of grouping are based on colour or finish (e.g gloss, opaque, matt etc) or even speciality (e.g. raku). At Clayman we also include a third large group called Brush-on. These are glazes that were initially developed for the hobby market, but are now used by many studio potters and education, for the many additional qualities they offer. All glazes under brush-on start out life as a earthenware or stoneware glaze, but are then added to a media or gel that places them into permanent suspension to make application by brush easy. All brush-on glaze manufactured by Clayman are available in powder form as well.
We sub-divide the three main groups into smaller ranges as detailed below with a brief description of characteristics:
(NOTE: A general firing range is offered for each group, but the individual glaze within the group may have a narrower firing range. Always check product label for details)
EARTHENWARE
Raku
Glazes especially developed for this specific technique.
Firing
Range
950-1040°C (Cone 08-05)
Transparent
A range of clear glazes firing to a gloss or matt, semi-matt finishes. Firing range 1020-1150°C (Cone 05-2)
Opaque
A range of opaque glazes with gloss, vellum or matt surfaces. Firing range 1020-1150°C (Cone 05-2)
Coloured Opaque
A range of unleaded opaque coloured glazes developing a gloss surface. Firing range 1020-1120°C (Cone 05-01)
Studio
A small group of low-solubility glazes firing to a gloss finish and developing colour characteristics often associated with traditional slipware. Firing range 1020-1120°C (Cone 05-01)
Super Coloured
A small range of glazes producing exceptionally bright or special effects. Firing range 980-1100°C (Cone 07-03)
Dipping
Pre-mixed glazes selected from the earthenware range, ready to use after decanting and stirring. Firing range 1020-1130°C (Cone 05-01)
STONEWARE
Mid-Range
A range of glazes that start to mature at high earthenware temperatures, but fire through the stoneware the stoneware range. Firing range 1180-1270°C (Cone 5-9)
Studio
A range of glazes where the clay body will effect the fired result. Firing range 1230-1300° (Cone 6-10)
Standard
A range of glazes with an optimum maturing temperature of 1260°C (cone 8)
Porcelain
Glazes especially formulated to work with this special clay body. Firing range 1240-1300°C (Cone 7-10)
Dipping
Pre-mixed glazes selected from the stoneware range, ready to use after decanting and stirring. Firing range 1180-1290°C (Cone
BRUSH-ON
Envision
Envision Glazes work with a variety of decorating techniques and produce a distinctively smooth and elegant appearance in colors ranging from opaque to transparent. All are safe for use on food containers. Firing range 1000°C (Cone 06).
Crystal & Crackle
Formulated to create cracks similar to crazing, Crackles Glazes result in a unique antique look. Crystals Glazes create bright multicolor bursts and specks, unique in every firing. Firing range 1000°C (Cone 06)
Crystaltone
Crystaltone Glazes are opaque gloss colors embedded with color crystals that melt and run during the firing process. Each firing results in unique. Firing range 1000°C (Cone 06).
Gloss
Gloss Glazes are leaded glazes that provide a wealth of color with a brilliant finish. Firing range 1000°C (Cone 06)
Garden
Garden Glazes are great for a variety of appearances. When used alone they give unique matte finishes with subtle two toned effects. Firing range 1000°C (Cone 06)
Miscellaneous
A range of glazes that produce special metallic effects, such as gold, silver or brass or snow. Firing range 1000°C (Cone 06)
Carnival Earthenware
A range of transparent, opaque or coloured opaque glazes working at conventional temperatures for the studio or craft potter. All glazes are unleaded. Firing range 1020-1120°C (Cone 05-02)
Clayman Clear & Opaque
A range of transparent and opaque glazes working at conventional earthenware temperatures. Firing range 1020-1150°C (Cone 05-2)
Studio Earthenware
A small group of low-solubility glazes firing to a gloss finish and developing colour characteristics often associated with traditional slipware. Firing range 1020-1120°C (Cone 05-02)
Super Coloured Earthenware
A small range of glazes producing exceptionally bright or special effects. Firing range 980-1100°C (Cone 07-03)
Mid-Range
A range of glazes that start to mature at high earthenware temperatures, but fire through the stoneware the stoneware range. Firing range 1180-1270°C (Cone 5-9)
Clayman Stoneware
A range of glazes where the clay body will effect the fired result. Firing range 1230-1300° (cone 6-10)
