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Mark C.

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Everything posted by Mark C.

  1. Most likely just fine if they are same temp clays odds 90% good
  2. (using the blade of the putty knife to scrape the partial layer (or a clean layer underneath?) yes this- not the other.
  3. There are some other tricks Use a fatter wire(one that is larger in diameter) To make Quick work of what you have on your bottom in photo use a 4 or 5 or 6 inch putty knife-they also clean up bats fast as well as the wheel head These are sold at hardware stores
  4. unloaded two great kiln loads-xmas stock is piling up-Back to working with 5#s of clay now-broken arm is coming along nicely now at 6 weeks .

    1. lgusten


      Good News!!!!  Glad you are mending well!

    2. Rae Reich
    3. Min
  5. With a zone controller -there is no reason for cold spots after some tinkering as Neil said. Also never hurry results-never good outcomes
  6. Mark C.

    Color Of Talc.

    French talk is for cosmetics at 8$ at pound you can see why cosmetics cost so much. No ceramic supplier I know on the west coast carries French talc You can buy it on the web-no telling what its make up is or where its from?
  7. Mark C.

    Slip reclaim

    I only use it to reclaim WET clay no dry trimmings-Porcelain s hard to get right after its dryed without slaking time and hassal. I go thru to much clay to worry about saving dry trimmings-life is short and clay is cheap. I wedge with the power wedger(petter pugger) I mix bodies and adjust moisture content as well as reclaim all wet clay.
  8. Mark C.

    Advice on Kiln I Found

    Yes fire it without black ring-its not needed for cone 6
  9. Mark C.

    Advice on Kiln I Found

    Go get it soon.Great price for a clean kiln
  10. Mark C.

    Triple beam or digital scale?

    I will add I use my triple beam (with tare adjustment)for super small test batches as its more accurate in small test batches. I have owned it since the middle 70's Its true that I'm a production guy who mixes large 10,000 batches every other week. My 1st digital I bought was an Ohaus the next one was from Amazon I would not go back to a triple beam myself-even for small batches I would jus buy a small digital.
  11. Mark C.

    Triple beam or digital scale?

    digital scale all the way I used a triple beam (with tare weight )for 35 years never going back-I now have two digital scales(both will tare weight) They speed up the whole process .Really a time saver.Give up on the triple beams. I buy two of the same identical plastic tubs to use with them.That way you can do colorants and other materials without washing between.
  12. Mark C.

    Studio Floorplan design

    In the professional world-the studio is laid out for workflow. That is clay flows in thru the various work stations (wedging-throwing-trimming) then onto bisque and glaze fires to pricing/packing and put to sales. For hobbist I'm not sure this is as important as the end point is not the same as the qaunities are so much less. Just lay it out for what makes sense to you depending on what you are planning on doing with clay. You can make glazes and still keep it clean.Making your own glazes means you are learning more about the whole process and will have way more control on finished products.
  13. Mark C.

    Skutt 1018 Error 1

    I would credit 250$- 300$ of studio time in trade. You have any idea where all the corrosion is from? Are you in Florida or Hi?
  14. Mark C.

    Skutt 1018 Error 1

    We do not even know what model or age it is? 2 .5 or 3 inch wall 10 years old? what condition are the bricks?More info will be needed for an value thoughts.Neil is the guy for this answer.
  15. Mark C.

    Skutt 1018 Error 1

    Call skutt they can walk you thru it.
  16. Mark C.

    Shrinkage isn't consistent

    Clay shrinks differently from the diameter to the height .That is its different in different dimensions . My suggestion is when you are talking to your customers you mention a variation to sizes-as its next to impossible to have them all be one exact size no matter how you measured with a throwing stick. Do yourself a BIG favored learn to work with some variation-as thats what makes for hand made work. Thats the reason its stands out from mass produced work-embrace this fact.If they need factory work thats slip cast within tight size dimensions thats not your job. I could tell you all the variables but I always ask for at least a 1/4 to 1/2 inch variation depending on the forms to any order. In my 45 years of orders thats a 1st fact to tell a customer-variation-it happens-I'm not a machine and ceramics is not a piece of metal on a lathe. Some of the things to consider is the wetness of the clay in the 1st place as batches all vary and you have next to zero control on this. That affects shrinkage more than you think. How much water you use to throw them-also can matter.The mix of and type some ingredients can also affect the outcome of water to clay mix(also out of your control) You are just thinking about temp as the one factor and its is one factor but only one in a list of factors. Changes in drying cycles-humidity can also affect outcomes-how long the clay has set since its made can affect it as well as the smaller nano particles can get wet or still be dry and suck up the water over time-another reason to use aged clay The way clay is made also affects the water content which will affect shrinkage-filter pressed clay is always more consistent but most makers do not use this method-they blunger clay (add dry material to water mix and pug it-as time goes by it gets wetter as the smaller particles absorb water slower and over time. Filer pressing get the clay wetter than water is squeezed out then clay is pugged. So thats how its possible. They all can mess with your best laid plans. The real deal is the final user will not know after a few glasses of beer that its one oz more or less -the bigger issue is should they drive or ride? There is a lot to this and its so much easier to just tell your customers that variation is what hand made itms are all about.
  17. No you just about always bisque most clays to 08-thru 04 with 06 being in the middle If you bisque to cone 5 the clay is vitrified and will not take glaze. Fire your bisque to cone 06.Thats not cone 6 but cone O6 about 1800 degrees
  18. Mark C.

    Leaving Teaching

    Selling pottery is a tough gig, and there can be very lean for years If you do not like teaching get out and get another job while you are breaking slowly into clay. Read up on all the past posts here on past persons starting out-you will find its tough road.
  19. Matt glazes for liner glazes are not a good solution for functionality . Its not as easy to clean them as they are not as smooth. It looks like your clear and the Matt to not work well where they touch. I do not think there is any hope for them-just start over I would use a liner glaze on the inner walls and bottom thats all one glaze and is not matt. Matts can put tension on pots as well especially on the inside.
  20. Mark C.

    Leaving Teaching

    I agree 110%-keep the job and transition into clay
  21. Mark C.

    Slip reclaim

    Straw house construction is the perfect recycle plan-craigslist under building materials
  22. 45 years and 11 months 2weeks and three days and still learning
  23. Mark C.

    Test firing electric kiln

    You could put a few bricks or posts in the load to create some mass.
  24. Mark C.

    Slip reclaim

    I average 2 buckets to 3 buckets a week tossed out for dry trimmings of porcelain . It is not worth my time dealing with it. That ton of slip I had was new in bagged 50# bags. I sold it below cost to a straw house build. Stephen learning takes time-two hours really ? do you know how many hours I have spent on answering folks here??? Creativity is also in the building trades
  25. Mark C.

    Test firing electric kiln

    Kiln fire differently with no load in them. You need the thermal mass to find out how it really will work . I read your kiln specs online and it should do cone 6 as its rated to cone 8. 19 hours is way to long for a fire. I suggest firing a real load of pots and put cone all over to see whats going on.

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