Slip vs. glaze? Question from an anthropology instructor on the difference
Posted 21 May 2012 - 06:48 PM
Posted 22 May 2012 - 08:08 AM
Kupu Ceramic Studio, Indonesia
Posted 22 May 2012 - 10:16 AM
Well, sometimes it's obvious as the slip is raised off the surface ... or the glaze is fluxed and shiny ... those are the easy ones. Another clue is that not many potters use glazes for any surface decoration that needs to be well defined and stay within its boundaries ... well, except for majolica which stays put during firing. Most glazes move on the surface of the pot during firing, so are not suited to painterly decorations unless multiple steps are taken. So if the decoration is sharp and detailed it is probably slip or underglaze ... but as I'm sure you have already noticed, not always.
Contemporary Fine Colored Porcelain
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Posted 25 May 2012 - 06:50 AM
If you look at Pueblo pottery black on black...the shiny parts are burnished. The dull surface has been made dull by reintroducing water or slip back over the burnished surface. Still there is no glaze.