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JBaymore last won the day on September 7

JBaymore had the most liked content!

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About JBaymore

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  • Birthday July 19

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    Wilton, NH USA
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    woodfiring, Japan, Chado, Iaido

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  1. Yeah there has. For this one, it is not the general information it is the spike from the "leatherhard clay" aspect that is potentially alarming in this study. One of the authors and I had a good bit of conversation on this, and he was pretty certain that there were not other aberrant factors that might have caused the spike. As I said.... we need more research on this specific aspect. Is this accurate.... or an outlier? best, ..........................john
  2. I have mentioned this very important 2016 article (from Ceramics Monthly magazine) many times here on the forum when the subject of studio dust and cleaning and respirators comes up. The full article is now online via the DOCTOR's personal website. This is MUST READ stuff if you are working with clay. Particularly in a "home studio" situation. Yes, it is a single study, and of course that alone has its limitations on how you can extend the validity of the data accumulated. But it was done well, and by a credible professional in the field (environmental epidemiologist and professor at McGill University and avocational potter). Right after it came out I had conversations directly with the author, since it is my professional duty to keep up with this stuff since I teach it at the college level. Both of us were concerned with what it appears to show. It "blows away" a lot of assumptions about dust generation in the studio and appropriate controls. Note the highest spike on the graph. It is from "sculpting leatherhard clay". An activity we all assume is not a high dust producing activity. (This study deserves WAY more research!) http://markgoldbergpottery.com/goldberg_studiodust-final.pdf best, ..........................john
  3. what is your favorite wax resist?

    A Luddite here. I still use hot wax. Have good hood ventilation, a good temperature controlled pan, a fire extinguisher next to it, and I watch it like a hawk. Have never found a liquid emulsion that works as well. BUT... I also do not do intricate fine-lined wax resist work. Much bolder strokes for decoration. best, .......................john
  4. The BUSINESS of Pottery

    Glad to hear this is true for others also. I'm way up also. Past month in particular has been really, really nice! Amen to the "Youtube is not a class" comment, Mark. A number of the professors now at my college worked for a major online "university" at one point. The stories they tell about the dilution of quality and expectations are appalling. They are 'back in the classroom" for a reason. And probably the MOST important aspect of this stuff about "business" is Chris' comment about, "Plan your attack for the long run of 5-8 years building a client base. It will pay off. " I don't care if you are "god's gift to clay".... you are not going to have a successful business overnight. It is easy to be successful at ceramics. All it takes is a lot of really hard work, some serious persistence keeping at it despite a lot of setbacks, and a decent plan to guide you thru those setbacks. Then, in a bunch of years,.... you'll see that it is "simple". best, ..........................john
  5. Another "trick" with food coloring is for brushwork. I use red food coloring like "ink" to do a "layout drawing" on a piece before going with a ceramic pigment. red always burns out. (I had a blue that left traces once.) best, .......................john
  6. Buying A Gas Kiln

    Only way to know current pricing is to call. And ther are a few "options' that are dependent on the particular installation plan... that can vary the costs. Call 1-800-431-6067 for a quotation. https://www.baileypottery.com/Kilns/Gas-Kilns/Studio-Deluxe-and-PRO-Front-Loaders Remember that you are going to need to ship it... and that you'll likely need a jobber to get it into the space.... and that you'll need the gas supply hookup....... and that you'll need to vent it. In VERY round numbers..... the kiln's price is going to be maybe half of the total costs involved. best, ....................john
  7. Yes.... this. Thanks for beating me to it, Neil. best, ................john
  8. Tyler, The UMF is one piece of data in the exploration. It is not the only one. Physical tests of varying types supply others. Any conclusions come from amazing all of the possible data and then trying to "connect the dots". Anyone who has looked into this subject knows that material sourcing has a huge impact as well as firing cycles. UMF is just one component. best, ....................john
  9. The ability of the computer to do the math fast allows you to spend the time analyzing the large amount of DATA you can generate, and then making conclusions or hypotheses from that data....... instead of spending that time doing repetitive math steps. THAT is the main reason to use it, and the driving reason that I did the program I did "back in the day". best, .......................john
  10. This is a huge "understanding issue" in the studio ceramic community. And also not understanding that using something like the word "copper" does not apply to all of the possible FORMS of "copper" and that they can have very different properties when it comes to the toxicological aspects. Hazard to US / Hazard to Others. Very different beasts. As likely over-generalization ...... hazard to us is probably always the larger issue. best, ..........................john
  11. Raku Question

    Nope, Lee. Cone 6 clay fired to cone six will probably have a 99.999% chance to succumb to thermal shock, either on the way up or the way down. If there is ANY chance for survival for this cone 6 work, it should be put into a totally cold kiln and heated with the first load. And take it up a bit gently. Then pulled, and QUICKLY put in a container with combustibles, and LEFT there til it is cool. Absolutely NO quenching. The body will not be like bisque..... meaning non porous. That quality is what allows raku ware to deal with the stresses of rapid and uneven heating and cooling. It is also what allows smoke to penetrate into the body and casuse the "black" stuff. best, ...........................john
  12. Raku Question

    Lee, Do you mean cone 6 stoneware that has been bisqued to some lower cone? Or do you mean cone 6 stoneware that has already been fired to cone 6? I've seen people use bisque (to something like cone 09 to 04) cone 6 clays in American Raku. They seem to work OK. best, ..........................john
  13. I stopped writing and selling glaze calc software as the programming technology sped rapidly away from me . Wanted to be a potter.... not a programmer. I started on a mainframe in college and with .... punch cards! Learned machine code, Fortran4 , COBOL, and BASIC. Continued a bit into early Visual BASIC..... and haven't had time since. Yeah, in some ways it was easier before the heavy display graphics business took over for very "mathematic / chemistry" input/output. I can still do it by hand.... but I 've gotten "lazy". best, ..........................john
  14. That's how I learned Tyler, "a long time ago in a galaxy far, far away" at UMass in the late 60's. Used a slide rule to do the math. Keeping track of decimal points was a real bear. When I teach glaze calc I always teach people what the software is doing because like you, I believe that an understanding of "what is under the hood" is important to really "get" this stuff. The repetitive math steps and table lookups is what eventually drove me to write early glaze calc software for a PC about 1979-80. Thanks for sharing this stuff. best, ................................john
  15. My Brent CXC is from the 70's.... still does it. best, ......................john