Wood ash

Wood ash is the powder left after wood has been in a fire, such as a home fireplace or an industrial power plant. Some gardeners use it to make potash. After being burned, only a small amount of wood is left as wood ash.

Wood ash from a campfire

Wood ash has also been used in ceramic glazes, in China, Japan, and Korea.[1] It has also been used to make soap.

References

Rogers, Phil (2003). Ash Glazes (2nd ed.). London: A&C Black. ISBN 0-7136-57820.

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[1] Rogers, Phil (2003). Ash Glazes (2nd ed.). London: A&C Black. ISBN 0-7136-57820.