Equipment

A large bucket of good rigid plastic, preferably colourless, or a crock of earthenware or enamel. In either case, ensure that the surface is not cracked, for the earthenware crock may have a lead base, or the enamel container an iron base, both of which are injurious when in contact with acid. Never use an iron, brass or copper container.

A cover for the bucket, either a fitting lid, or sheet plastic tied down with string.

A sieve or piece of muslin.

A large funnel, preferably the size into which the sieve will fit.