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Babs

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  1. Thanks. The purged clay dark cores I am referring to is a commercial clay. And one batch of this when dry had the rubbery strands which made me think a product had been added which was not bentonite or ball clay... I am aware of the light Bentonite, curt filled me in in that.
  2. Babs

    cadmium red

    Yeh avoid it. I have a drinking vessel by a Scottish potter , purchased at Harrods, bright red inner, beautiful unglazed outer. I don'tdrink from it but I think the comments at the time was that the red had been introduced in an encapsulated form. I'll try to find it.
  3. Thanks glaze Nerd, certainly is logical. The stuff I found in the dried out clay was stretchy and 'rubbery strands. What are the plasticisers used for grout etc by builders. My current terracotta clay co as with a central core running through the purged clay of a darker colour than the outer clay. Bentonite??? Rich clay? Thanks for keeping it succinc!
  4. Well go for it glazenerd, I can skim read pretty well :-))))) but interested in the logic. I once had a batch of clay which totally dried out and on smashing it to reconnstitue I found strands of stuff a but like dried latex.
  5. Are these glazes? 80% titanium dioxide TiO2 seems overkill for slip or glaze Tin oxide SnO2 around 10% is about norm for a glaze and as written above can be sub stituted by other opacifyers unless you're looking for other attributes that TiO2 brings to the glaze. Zirconium will introduce a whiteness also.. Still not sure where you're going with this. Folk use white slips on red clay and use clay bodies possibly deflocculated . A lot has been written in these forums about this
  6. Reading hamer and hamer last night, reclaiming clay here..bentonite a lubricant for sure and increases plasticity But not workability! Well I was reading this as some of my reclaimed clay lacked strength, my description, ok for thick walled thrown pots but didn't hold up to my usual thickness of thrown pots. What would a better plasticiser be? And would this poster's problem be similar?
  7. I think the question is unanswerable unless the required result and what it'sbeing added to ....chicken soup???..Is clarified. With Neil on cost. Xx
  8. Babs

    avataroriental

    Stunningly beauriful
  9. Babs

    Glaze Defect

    If the defect is the blog of matting glaze to the left think it is a stirring the glaze properly defect. I'm assuming the all over texture is meant.... Are you dipping or brushing ?g
  10. Sure , agree with Neil totally. Look at some firing schedules posted in these forums.
  11. How many segments can you program? Many potters would have a more gentle 1st segment. Then 100C/hr to 600 Then 150 C poss to close to final temp Then a slow down to final temp. And a soak. That would be a glaze firing schedule which would be altered according to contents of kiln....
  12. Babs

    Effects of iron chromate

    Yup it goes along with barytes sp.
  13. Also that pic of mold shows a slight groove at that dicky transition which could be a contributing factor also. It's Not the smoothest mold I have seen.
  14. Well maybe a bit less jiggering and a bit more jollying:-// When working my C6 clay I can get away with being a bit less subtle when rolling and pressing. My terra cotta needs handling with care aka shortcrust pastry as opposed to pizza dough. So rolling and pressing into forms requires more gentle rolling and easing into shape more carefully or the clay WILL crack . Longer all over drying too.
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