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Celia UK

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Everything posted by Celia UK

  1. I've done this lots of times without a problem. As suggested, keep bisque and glazing on different shelves.
  2. I'm with you Babs! I used slightly different Maths and got to 3.2g in a 100g sample.
  3. Thanks Old Lady - I've certainly got something to start with! I agree that 113 is better than 103.
  4. Now you've really got me confused Marcia. Old Lady's original post has 2.1 (%) cobalt oxide although the quantities she subsequently recalled - 2172g batch with 42g cobalt oxide is actually 1.9%. (42/2172 X 100) The additional 20g because carbonate is weaker makes it 2.85%. so I'm not sure where your 20% & 33% come from??
  5. I recycle my slop and trimmings on a plaster slab - works just fine. Scrunch it all up, tip it out, ease in the edges so it doesn't run off, roughly level it out to an even depth and leave for a few hours (depends on air temperature). When it looks and feels about 'right' I roll it up and knead it and it's good to go! The only disadvantage of using a slab in a plastic tub would be the time it takes to dry out the slab ready for the next batch (if you don't want to risk tipping the slab out to dry that is). That may not be an issue in a warmer climate than we have here!!!
  6. When you used cobalt carbonate Old Lady, how much did you use in this recipe? I only have the carbonate.
  7. I'll be interested to see the replies to your post Martin as I too like to work with a transparent base plus stains. On the successful test tiles in your picture, what % steins have you used? They look great! The very successful transparent glossy glaze I tested (stoneware) had lead bisilicate in it which I was told wasn't really a good idea for anything functional. I haven't yet got back to trying an alternative.
  8. Awesome Mark! As I've commented before, I think this is more than I've made in my four years of potting. If I could throw 10 matching 'anythings' in one day I'd think I'd been productive/clever! As for combining a big show with a dive trip....well, I'm speechless. I'm quite sure it's great for your well-being to have a hobby that takes you away from your work, especially given your amazing work ethic. Clearly you are one of those people who thrive on it. Well done you!
  9. I must agree Diesel - on all counts above. Back from holiday (cruise on the Rhine, Old Lady - BTW thanks for info on cups and sticks!!)) - I looked up my notes to find the formula and Pieter was right thinking the formula I remembered was Brogniart's. When I first came across It a few months ago, I saw that it came out pretty close to the guesstimate starting point I'd been doing anyway and wondered why there was such a complicated way of getting there.
  10. It would certainly help if you used metric measurements over there! There is actually a formula related to this question but I'm away on holiday and can't lay my hands on it until I return. I'll try to remember to dig it out & post it! Another tricky one is the 'cup' as a measurement. In the UK a cup can be any amount at all - whatever size your cup is! We don't have a standard cup measurement, nor a 'stick' of butter that I've seen in US recipes!
  11. Celia UK


    Realise I forgot to post fired pictures - both these were successful and given away to admiring friends! More in the planning stage.
  12. Celia UK

    IMG 5912

    What's this gorgeous glaze? I love it. Is it bought or have you mixed it yourself?
  13. Think I must have opted for a complex recipe to do my comparison exercise. Will look for another recipe and go through the exercise again!
  14. Good luck! At least you can get on with it without having to wait until you have a kiln load to fire.
  15. CTM Potters do FF3134 Ayjay, but their Standard Borax Frit is about half the price.
  16. I always thought mixing my own glaze would save money Denice - until I costed it out and even a basic low fire transparent was barely cheaper AND I calculated the costs proportionately to the quantity in the recipe! The only advantage I could see is if anything goes wrong, you do at least know the glaze ingredients and might be able to adjust the recipe. ALSO my experience of a premixed transparent is contrary to yours - I have one that is virtually foolproof and totally forgiving of any poor application techniques. If I could find a recipe that achieved the same success I'd go for mixing my own again, but I'm still looking. At least, having gone through the exercise of costing out a recipe I now know which ingredients are the expensive ones and which the cheaper ones!
  17. Yes that's about it Roberta. Stencils with the motif being the negative part (the holes). This one was actually some flower wrapping paper that was holey all over and I cut small pieces, laid them around the bowl, cut small pieces of tissue transfer paper, laid on top, sprayed lightly with water, rubbed them gently with a rubber tipped tool, left to dry then peeled off and removed the stencil. The creamer stencil I made myself on a Silhouette stencil machine, cut from thin plastic film (thin filing wallets) as it's flexible enough for the curves. Same process. Lots of potential and given the price of stencils - quite a good use of them.
  18. Celia UK


    Various white earthenware pieces with transparent glaze fired to 1100oC.
  19. From the album: 2016

    After reading CAD article about making your own transfers, I tried this using a rubber stamp with stain & frit 50:50 mix. Stamped on to tissue paper, applied to leather hard clay. Bisqued to 1000oC. Dipped in transparent glaze & fired to 1100oC in an electric kiln.
  20. From the album: 2016

    Experimenting with bought tissue transfers and stencils as resist. Thrown white earthenware. Dipped in transparent glaze & fired to 1100oC in an electric kiln.
  21. From the album: 2016

    Made for a friend's 50th birthday. Various 'significant' words & phrases stamped inside and out with different letter styles, highlighted with oxide washes before bisque firing. Dipped in transparent glaze & fired to 1100oC in an electric kiln.
  22. From the album: 2016

    Small bowl with pinched floral additions. Stains added to transparent glaze painted on flowers. Whole piece dipped in transparent glaze. Fired to 1100oC in electric kiln.
  23. From the album: 2016

    Thrown bowls, cut at right angles to the rim. Thin slabs textured with bark, stamps, shells etc. - pieces attached to back part with front cut edge eased forwards to emphasise the contrast between the organic and engineered. Oxide washes applied at dry greenware stage, fixed in the bisqued firing. 3 back pieces were dipped in transparent glaze, front one dipped in tin white (to cover a repair that fired a different colour!). Fired to 1100oC in electric kiln.
  24. From the album: 2016

    3 creamers with cobalt tissue transfers applied through a home made stencil with transparent glaze over. Wedding favours - 2 test pieces (120 in total) glazed with Mayco Stroke and Coat. Individual name tags to be attached using teal ribbon. These are for my niece (a labour of love) - would never be cost effective as a commercial item, unless someone had money to throw away! Fired to 1100oC in electric kiln.
  25. Glaze firing on - mostly transparent over oxides and tissue transfers with my v reliable glossy glaze. On the shelf is a batch of stoneware pieces from a throwing workshop I attended - after 2 failed stoneware glaze firings I'm very reluctant to get on with these. Have tweaked the glaze and will do just one test piece before sacrificingthe rest to the kiln gods

    1. Celia UK

      Celia UK

      Will post pics in the morning when I unload.

      That's a very good question Roberta - it crawled horribly on various pieces. I THINK I'd thinned it too much with water, when someone suggested it should be thin (after a precious disaster!). Now, I've drawn off the excess water and will be programming a slow cool. Problem is getting enough stoneware together to fill the kiln and having the right pieces for a different glaze to accompany my test piece.

    2. Celia UK

      Celia UK

      That was - 'previous' disaster - though the work was of course 'precious' !!!!

    3. Celia UK

      Celia UK

      Pictures in my gallery. Quite pleased - some glaze a bit thin and oxides on the pale side. I was trying not to overload either! Cobalt transfers on the creamers have run a little at this temp, so will fire lower next time. Full speed ahead for the rest of the wedding favours, now I know the glaze will work.

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