Science
Wood ash is primarily made up of calcium carbonate, which is used in many glaze recipes. The ash also contains potassium carbonate, phosphates, and other metals; however, the ratio of these chemicals depend on the location, soil, and type of wood the ash came from. The different chemical compositions make the glaze to produce different results from batch to batch. Furthermore, two pieces with the same glaze batch can even have different results. If the ash its not cleaned or mixed thoroughly, some parts of the glaze mixture can have more of one chemical and others could have more of another making each part of the glaze to actually have varying concentrations of chemicals.
Read more about this topic: Ash Glaze
Famous quotes containing the word science:
“The science hangs like a gathering fog in a valley, a fog which begins nowhere and goes nowhere, an incidental, unmeaning inconvenience to passers-by.”
—H.G. (Herbert George)
“But don’t despise error. When touched by genius, when led by chance, the most superior truth can come into being from even the most foolish error. The important inventions which have been brought about in every realm of science from false hypotheses number in the hundreds, indeed in the thousands.”
—Stefan Zweig (18811942)
“For twenty-five centuries, Western knowledge has tried to look upon the world. It has failed to understand that the world is not for the beholding. It is for hearing. It is not legible, but audible. Our science has always desired to monitor, measure, abstract, and castrate meaning, forgetting that life is full of noise and that death alone is silent: work noise, noise of man, and noise of beast. Noise bought, sold, or prohibited. Nothing essential happens in the absence of noise.”
—Jacques Attali (b. 1943)