There are another couple of reasons why raku pottery is not suitable as dinnerware:įirstly, many raku glazes contain metal oxides such as lead and cadmium. Liquid can seep in the cracks, and bacteria can harbor on in them too. However, it does mean it is not suitable as dinnerware. The crazing on raku pottery is an intentional design effect. The reason for this is that it undergoes sudden temperature changes when it is being fired. This makes them unsuitable as dinnerware.Īlso, the surface of raku pottery is generally crazed and cracked. Why is Raku Pottery Not Suitable as Dinnerware?īecause the raku ceramic and glaze are not strong, they chip and break easily. As a result, raku pottery unsuitable for being a water-holding vessel like a vase. This means it absorbs liquid and it is not especially strong or durable. It can take between 8 and 12 hours to glaze fire pottery in an electric kiln.īecause raku is fired for a shorter period at a lower temperature, the ceramics and glaze are not fully mature. This is a lot less than a regular kiln firing, be it gas or electric. A raku firing can take anything between 30 and 90 minutes. The raku firing process is quick and low fire. Why Might Raku Pottery Need to be Sealed? Let’s look at each of these different reasons in turn, and consider what can be achieved and how. Trying to make the raku pottery food safe and functional as dinnerware.Making the raku pottery waterproof so it can be used as a vessel like a vase.Protecting your ware and preserving the look of your raku surface.There are a few reasons why potters may want to seal their raku pottery.
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