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<p>[QUOTE=&quot;Taupou, post: 281951, member: 45&quot;]In answer to the second part of your question, there is no glaze involved.&nbsp; Traditional black-on-black San Ildefonso pottery is never glazed.&nbsp; The shiny surface is a result of <i>burnishing, </i>polishing the leather-hard clay with a smooth stone stone, before it is fired.</p><p><br /></p><p>The black color is a result of the <i>reduction</i> firing technique, where the pot is traditionally-fired in an outdoor bonfire.&nbsp; The <i>reduction </i>part refers to the fact that the amount of oxygen allowed to reach the pot during the firing is reduced, or cut off.&nbsp; This causes a chemical reaction in the clay itself, which changes what would otherwise be red clay, to black.&nbsp;&nbsp; If oxygen reaches the pot, it remains red, if it is reduced, the pot turns black.[/QUOTE]</p><p><br /></p>

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