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Spectrum 850 series Raku Glazes


spectrum Raku GlazesSeries: 850 to 879 Glaze Type: Low Temperature
Raku glazes are some of the most popular choices due to the beautiful and unique appearance that each piece offers. Spectrum 850 Series Raku Glazes can be applied by brush, poured, or used for dipping. These glazes can be fired up to cone 06.

Due to the many variables involved in Raku firing, particularly during the reduction phase, our chip charts and printed color charts should be used only as approximate guidelines. Your results may vary greatly due to different firing conditions.
Spectrum Raku glazes
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Raku firing requires a specific process. Potters should fire the glaze to a heat of no higher than 1650 to 1750 and then allowed to cool in the kiln. While still hot, pieces are transferred to a sealed reduction bin that is lined with organic material such as sawdust or newspaper. The organic material then ignites, which helps to give pieces their unique appearance.
850-879 - Our Raku glazes were developed for firing in either electric or gas kilns. The firing process is described below. Eleven of the Raku glazes are lead-free and non-toxic (850,851,854,856,871,872,873,874,875,877,878). All of the rest are lead-free, but are over the threshold limit for copper and are therefore not non-toxic in the liquid state. Our liquid glazes are set up for brushing application. They can also be poured or dipped on pieces, although they should probably be thinned with a little water for this type of application. Our dry glazes are set up for dipping application.


RAKU FIRING – Raku glazes can be fired anywhere from 1600 F up to cone 06 (1850 F) in either an electric or gas kiln. We recommend firing 850 to 856 and 868 to 879 to a peak of 1700 - 1750 F and 860 to 866 to a peak of 1600 - 1650 F. They should be allowed to cool in the kiln to 1600 F. Different combinations of peak temp and reduction starting temp will produce different results. While still red hot they should be transferred as quickly as possible into a reduction bin (typically a lidded metal garbage can or small metal container that has been lined with organic material, such as newspaper and/or sawdust, etc.). As soon as the pieces are in the bin the lid should be put on to keep oxygen from entering the container, in order to develop the reduction atmosphere. The pieces should be allowed to cool in the bin for at least 20 minutes.

WARNING: When red hot pieces go into the bin, the organic material ignites and will produce flames and smoke. This part of the firing, particularly the opening of the reduction bin, should be done outside. Always take safety precautions when firing raku such as the use of high temperature gloves, protective eyewear, and a respirator. Always have a fire extinguisher handy.


FIRING TIPS
- Try to size the reduction bin to the size of the piece
- Establish a good seal to the reduction bin so that air is not entering and smoke is not leaving the bin.
- Position the organic material ( newspaper, sawdust, etc.) and the piece so that the flames can get all around the piece.
- Different organic materials may produce very different results, for example a glaze reduced in newspaper could be a beautiful blue color and the same glaze reduced in sawdust could have a metallic copper appearance.
- Pieces should be cleaned immediately with water and a hard bristle brush. After cleaning, warm the pieces in the kiln to evaporate any water from the piece. This helps to set the colors more permanently.

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Spectrum Glaze 850 RAKU CLEAR: PINT Spectrum Glaze 850 Raku Clear: Pint

Spectrum Glaze 850 RAKU CLEAR: PINT

Our Price: $11.50
Spectrum Glaze 851 RAKU WHITE: PINT Spectrum Glaze 851 Raku White: Pint

Spectrum Glaze 851 RAKU WHITE: PINT

Our Price: $12.50
Spectrum Glaze 852 TURQUOISE: PINT Spectrum Glaze 852 Turquoise: Pint

Spectrum Glaze 852 TURQUOISE: PINT

Our Price: $16.00
Spectrum Glaze 853 COBALT BLUE: PINT Spectrum Glaze 853 Cobalt Blue: Pint

Spectrum Glaze 853 COBALT BLUE: PINT

Our Price: $16.00
Spectrum Glaze 854 CELADON: PINT Spectrum Glaze 854 Celadon: Pint

Spectrum Glaze 854 CELADON: PINT

Our Price: $16.50
Spectrum Glaze 855 EMERALD: PINT Spectrum Glaze 855 Emerald: Pint

Spectrum Glaze 855 EMERALD: PINT

Our Price: $14.00
Spectrum Glaze 856 MUDDY WATERS: PINT Spectrum Glaze 856 Muddy Waters: Pint

Spectrum Glaze 856 MUDDY WATERS: PINT

Our Price: $14.00
Spectrum Glaze 860 FLASH: PINT Spectrum Glaze 860 Flash: Pint

Spectrum Glaze 860 FLASH: PINT

Our Price: $13.00
Spectrum Glaze 861 METALLIC FLASH: PINT Spectrum Glaze 861 Metallic Flash: Pint

Spectrum Glaze 861 METALLIC FLASH: PINT

Our Price: $16.00
Spectrum Glaze 862 BLUE GALAXY: PINT Spectrum Glaze 862 Blue Galaxy: Pint

Spectrum Glaze 862 BLUE GALAXY: PINT

Our Price: $16.00
Spectrum Glaze 863 BLUE NEBULA: PINT Spectrum Glaze 863 Blue Nebula: Pint

Spectrum Glaze 863 BLUE NEBULA: PINT

Our Price: $18.00
Spectrum Glaze 864 SUNSPOT: PINT Spectrum Glaze 864 Sunspot: Pint

Spectrum Glaze 864 SUNSPOT: PINT

Our Price: $16.00
Spectrum Glaze 865 MARS: PINT Spectrum Glaze 865 Mars: Pint

Spectrum Glaze 865 MARS: PINT

Our Price: $16.00
Spectrum Glaze 866 DEEP SPACE: PINT Spectrum Glaze 866 Deep Space: Pint

Spectrum Glaze 866 DEEP SPACE: PINT

Our Price: $22.00
Spectrum Glaze 867 STAR NIGHT: PINT Spectrum Glaze 867 Star Night: Pint

Spectrum Glaze 867 STAR NIGHT: PINT

Our Price: $22.00
Spectrum Glaze 880 Armadillo Pint: (replaces Gator Skin)

Spectrum Glaze 880 Armadillo Pint

Our Price: $16.00
Spectrum Raku Glaze 881 Oxblood Pint Spectrum Raku Glaze 881 Oxblood Pint

Spectrum Raku Glaze 881 Oxblood Pint Low-fire Semi-Transparent

Our Price: $22.00
Spectrum Raku Glaze 882 Orchid Pink Pint Spectrum Raku Glaze 882 Orchid Pink Pint

Spectrum Raku Glaze 882 Orchid Pink Pint Low-fire Semi-Transparent

Our Price: $14.00
Spectrum Raku Glaze 883 Amethyst Pint Spectrum Raku Glaze 883 Amethyst Pint

Spectrum Raku Glaze 883 Amethyst Pint Low-fire Semi-Transparent

Our Price: $18.00
Spectrum Raku Glaze 884 Aqua Pint Spectrum Raku Glaze 884 Aqua Pint

Spectrum Raku Glaze 884 Aqua Pint Low-fire Semi-Transparent

Our Price: $14.00
Spectrum Raku Glaze 885 Blue Topaz Pint Spectrum Raku Glaze 885 Blue Topaz Pint

Spectrum Raku Glaze 885 Blue Topaz Pint Low-fire Semi-Transparent

Our Price: $14.00
Spectrum Raku Glaze 886 Lapis  Pint Spectrum Raku Glaze 886 Lapis Pint

Spectrum Raku Glaze 886 Lapis  Pint Low-fire Semi-Transparent

Our Price: $14.00
Spectrum Raku Glaze 887 Neptune  Pint Spectrum Raku Glaze 887 Neptune Pint

Spectrum Raku Glaze 887 Neptune  Pint Low-fire Semi-Transparent

Our Price: $16.00
Spectrum Raku Glaze 888 Cassiopeia  Pint Spectrum Raku Glaze 888 Cassiopeia Pint

Spectrum Raku Glaze 888 Cassiopeia  Pint Low-fire Semi-Transparent

Our Price: $20.00
Spectrum Raku Glaze 889 Andromeda  Pint Spectrum Raku Glaze 889 Andromeda Pint

Spectrum Raku Glaze 889 Andromeda  Pint Low-fire Semi-Transparent

Our Price: $20.00
Spectrum Raku Glaze 890 Chimera  Pint Spectrum Raku Glaze 890 Chimera Pint

Spectrum Raku Glaze 890 Chimera  Pint Low-fire Semi-Transparent

Our Price: $20.00
Spectrum Raku Glaze 891 Northern Lights  Pint Spectrum Raku Glaze 891 Northern Lights Pint

Spectrum Raku Glaze 891 Northern Lights  Pint Low-fire Semi-Transparent

Our Price: $14.00
Spectrum Raku Glaze Pint Spectrum Raku Glaze Pint 870 Starry Night 2

Spectrum Raku Glaze Pint 870 Starry Night 2

Our Price: $22.00
Spectrum Raku Glaze Pint Spectrum Raku Glaze Pint 871 Raku Yellow

Spectrum Raku Glaze Pint 871 Raku Yellow

Our Price: $18.00
Spectrum Raku Glaze Pint Spectrum Raku Glaze Pint 872 Raku Orange

Spectrum Raku Glaze Pint 872 Raku Orange

Our Price: $18.00
Spectrum Raku Glaze Pint Spectrum Raku Glaze Pint 873 Raku Red

Spectrum Raku Glaze Pint 873 Raku Red

Our Price: $30.00
Spectrum Raku Glaze Pint Spectrum Raku Glaze Pint 874 Lime

Spectrum Raku Glaze Pint 874 Lime

Our Price: $20.00
Spectrum Raku Glaze Pint Spectrum Raku Glaze Pint 875 ALGAE BLOOM

Spectrum Raku Glaze Pint 875 ALGAE BLOOM

Our Price: $20.00
Spectrum Raku Glaze Pint Spectrum Raku Glaze Pint 878 COSMIC COPPER

Spectrum Raku Glaze Pint 878 COSMIC COPPER

Our Price: $22.00
   
 
Spectrum 850
series Raku Glazes