Pumice is an igneous or volcanic rock in powder form. It contains silicon oxide and aluminum oxide, which wehn mixed up generates a very fine powder that is used for various finishing techniques.
Obtained from high purity silicate stones it is especially valued as a filler in French polish finishes. In spite of its opaque coloration, the mixture of this powder with shellac produces a very usable transparent finishing paste.
It can also be used as as a filler when mixed with alcohol and maybe some oil. By filling pores a smooth surface van be ontained on which the final finish is easy to apply. It can also be mixed with water or liquid kerosene for other types of finishes.
