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Raku is a pottery technique that originated in the sixteenth century, Japan and Korea. Most types of pottery are loaded into the cold oven and then heated slowly for a period of 8 to 24 hours until the final temperature is reached, then the furnace was allowed to cool slowly. By contrast, in the technique of raku pieces preheated of bisque ceramics are placed in a hot oven raku pottery so that it reaches its final temperature in less than half an hour a. Instead of measuring devices such as cones for controlling the firing, the enamel maturity is judged by eye, through the peepholes in the kiln. When the firing is completed the goods yet warm (still molten glaze) are removed from the oven immediately with tweezers. In the modern version of traditional Japanese raku technique, the goods are placed in a container with sawdust or leaves and it stops smoking. This gives the post-combustion reduction of surfaces and interesting effects to pottery, and nonmetallic or cracked surfaces. The finished goods are lava when it cools abrasive to remove the soot and ash residue. The effect of the reduction process depends on the type of material fuel, the size of the particles (wood chips, wood shavings or sawdust), and humidity of the material used in the reduction chamber.

Raku clays should optimally contain a considerable amount of fireclay refractory material or otherwise, that can withstand sudden warming Raku technique. The clay should be open enough to expand and contract without cracking. Most low fire glazes to cone of 06 glazes, you can use for making raku pottery. However, if a variety of varnishes are used in the same piece, or pieces in the same kiln load, then they must ripen on the temperature very end. The only bright metallic effects and crackle lines are typical of raku technique are achieved by rapid fire from the maximum (enamel cast) and then decrease rapidly after cooking. It is important to remove the ceramic oven chamber and cover before reduction has been had a chance to cool off. YouTube lines also depend on the thickness of the glaze applications. Brighter colors can be achieved by spraying the parts of the glass with water, or holding it in the air for half a minute before placing in the reduction chamber, which cools the rust and paint.

Modern raku technique was popularized by Paul Soldner after the Second World War. While traditional raku bowls were used in Japanese tea ceremony, most Raku ware is porous and fragile, making it unsuitable for actual use. Unless the raku is treated with a sealant such as acrylic or polyurethane, sweat and ceramics decompose over time. Furthermore, the low fire raku glazes used in ceramics are very soft and easily chipped (and therefore possibly swallowed). Hence, if Raku is used for food should be limited to dry foods.

Raku is an example of how modern technology can both imitate and enlarge an ancient technique. A modern raku kiln and modern low fire glazes allow for very interesting effects unknown to the Japanese originators. Depend upon AMACO for the top line of kilns and widest variety of cone 06 glazes.

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