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Mark C.

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About Mark C.

  • Rank
    Advanced Member
  • Birthday 03/15/1953

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  • Gender
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  • Location
    Near Arcata Ca-redwood rain forest
  • Interests
    Diving-underwater photo-salvage diving-dive Travel
    Extreme offshore tuna fishing off north coast of Ca.
  1. I use my full size blender each week almost to mix the rough stuff like Zinc Oxide or any heavy clumping material in a glaze . A few minutes in the blender then pour to thru my talisman 80 mesh into the main glaze I'm mixing up. I'll add the tool part later its late.
  2. You could recut the rim after squaring. I tend to do this on chopsticks bowls and like the raised sides which have cut outs for the sticks. Since you have a lid and its metal the sides need to be all the same level-You could also sand it smooth in the green state and smooth out the rim afterwards.
  3. Highwater clay users

    I know a few potters whom gave up on B-mix then moved to there bodies.
  4. Highwater clay users

    (thixotropic) this happened to some laguna clays like B-mix out west here some years ago. Laguna had changed water sources and it really did a number on some clays.
  5. Keep your seconds as Mea says for other venues not shows. I used to save mine for home sales but gave up home sales after 19 years of them. Now I take them to one local show that is a lot of students whole look for seconds. I now save them for that deal.
  6. I often make square bowls bowls. After trimming and putting a foot on them I rewet them and paddle them square.Just another way to get square pots .
  7. The issue with commercial glazes is you do not know whats in them or how to fix them. I can add that your body cone 6 to then 10 is a big issue but you already know this. The only other point is Laguna makes glazes with the cheapest materials they have in glazes -meaning silica (most likely 200 mesh) etc etc. I know this as they make glaze for me in 1 ton lots, but I specify the materials vs let them use the cheapest which they did the 1st batch. On the plus side they usually are the cheapest suppler around. One last factoid they have a New owner as John Brooks sold it this year.
  8. anyone ever tried the vertical slab rollers?

    I have often wondered about this as most slab rollers come out flat and thats the way I use them so I do not have to move the slab much (distort) In a vertical I think you would have then lay it flat (distort it more?) not sure on this point maybe Doc can clear this up. The best thing in theory is gravity would make it want to self feed.
  9. I usually just greet them being friendly if its slow-the pottery sells itself.
  10. microwave proof?

    Another issue for microwave is iron. If your clay body contains iron that will heat up the pot and if its a rich iron bearing clay it can damage the microwave . The usual effect its a very hot pot with typical stone wares bodies.My Porcelain clay body since its iron free microwaves well.
  11. name this glaze?

    I think you got it Pres since most likely its not a mug intact after all those years.
  12. name this glaze?

    Looks like a cone 10 reduction fired glaze on a stoneware iron spot body-very popular in the 70's . The satin Matt is the hard part. maybe a waxy white ?mine was called Billy Joes butter white and looked very close to this if fired in the right conditions (reduction) on the right clay and glazed the right thickness in application. Maybe from Laguna in their cone 10 glazes in dry powdered form. Always mixed my own.
  13. I also would keep your price at even numbers . You can add tax to that price during the sale. I have done this for over 40 years. People these days really distain change.I actually round up or down often to the nearest quarter most of the time when giving change. The exception to this is grocery store pricing where they always end the price in 9.
  14. What are cone temperatures

    Cones measure time and temperature (also called heatwork) Since they are in kiln along with your pots they are the most accurate . Controllers recreate this electronically . These work really well but the downside is they can break but the risk is low as Neil says he has 2500 firings without cones. They use thermocouples to get the info and these can wear out and can give false readings. Type S thermocouple are the most accurate and cost the most and last longer . Most kilns use type K thermocouples. I consider thermocouples to be the weak link. In my temperature range and atmosphere (above cone 10 in gas reduction) these thermocouples are less accurate. I use platinum thermocouples which cost the most. I suggest using some cones spread around your kiln and learn whats going on in all those locations before giving them up. Just as Mea says in above post.
  15. fixed it-they are now keeping those animals out of store