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GregP

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About GregP

  • Rank
    Member
  • Birthday 02/01/1951

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  • Location
    Sydney, Australia
  • Interests
    Flying (both in aircraft and in my 1967 sports car!), pottery, thorough reading and research.

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335 profile views
  1. Thanks for that Babs. No, the glazes were not "transparent" nor opalescent and my clay comes out of bisque firing almost perfectly white.. Yes, the pieces were fired at the correct temp; cf magnificent finish (not colour) on the glazes. And many thanks for your advice.
  2. Min, I think you may have hit the nail just where it hurts. The underglazes i used are quite 'thin'; indeed, most of them didn't need thinning before application whereas the glazes are all new (in pots) and appreciably thicker than the underglazes. When i get the chance i'll 'dig' down into the glaze pots to see how intense the colours are 'down there': i gave them a good shake before opening but i fear that was not good enough. Cheers for now ...
  3. Yes, almost all of my glazes are the Cescos you've attached. The undergalzes i used were white, yellow, pink, green, blue, black, red and perhaps another colour or two. I believe i mixed them well but i might just reopen the jars and see if in fact i did. But i don't understand what you mean by "Looks like stains used for the colourants of those glazes"(?). The use of undergalze did more than simply 'intensify' the glazes; they made them colour as they were meant to be by reference to the Cesco sample sheet you referenced.
  4. Further, the clay i used and what i'm using now are both the same colour (ie off white/light grey). I'm doubtful that the temp is the problem(?!?!?!?) as the glaze finishes perfectly, just much 'faded'.
  5. The clay i'm using now is identically described as what i used in the other studio.
  6. Sorry Pres, i can't photograph them as they're all wrapped up as Xmas gifts. However, the thing you'd spot immediately is that they are very pale yet with excellent surfaces. Imagine: what was meant to be 'Burgundy' has come out an insipid cream with a very occasional pinkish streak.
  7. I'm using Cesco glazes (and Australian under-glazes). I don't believe it has anything to do with firing temps or other agents in the kiln because if i under-glaze first, pieces come out of the kiln with wonderful colouaration. It's when i don't first under-glaze that work comes out extremely pale and almost colourless. I never had these problems when using an identically described mid-fire clay before i moved to my current address and started using, again, another mid-fire clay. So i'm fairly confident it has nothing to do with the kiln, firing temp and (presumably) the glazes because, as i keep saying, if i underglaze first the results are delightful. Beats me ...
  8. I've just collected from my 'firer' over a dozen pieces I've thrown, bisque fired then glaze fired (all cone 5/6). Heartbreak ... every glaze has washed-out/faded so much that there's hardly ANY colour on the pieces; the exception being the few pieces i underglazed before applying the (over-)glaze. It seems almost certain that the earthenware clay I'm using will 'devour' any glaze i apply unless i apply an underglaze first!! Any thoughts? ... i certainly hope i don't have to buy shares in an underglaze manufacturer in order to deal with this!?!?!?!
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