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Marcia Selsor

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Everything posted by Marcia Selsor

  1. I like that exhaust filter. I could use one. I use a vapor mask for the chlorides and sulphates I am using. Marcia
  2. Thank you. There are many others represented in the book and Lindsay does an excellent job in describing how to fire many alternative techniques, pit barrel, raku as well as wood-fired kilns. In addition there are sections on recipes for clay, slips and glazes. Marcia
  3. This book has just been released and focuses on kiln firing fir Raku, Pit, and Barrel plus high fire wood kilns. The galleries are full of beautiful work by many ceramic artists. I am excited to be included along with many others. One piece of mine is an Obvara pot with sodium silicate crackle surface and the other in an installation of terra cotta paper clay books pit fired during my residency at Archie Bray. I used the train kiln and a pit. The installation is a memorial piece for 9/11. Marcia
  4. Just received y copy of Mastering Kilns and Firing. I am happy to be included in this new book by Lindsay Oesterritter..

  5. back in 1971 I was a caretaker on a religious estate.I had a pottery set up in a cabin and I mixed clay every morning in the basement of the mansion. There was an abandoned greenhouse with lots of earthenware flowerpots. I lined the pots with a little piece of newspaper over the drain hole and cheese cloth inside the whole pot. I had shelves of ware boards facing the boiler lined with these flower pots. The would dry to workable consistency in 3 days.I just kept a steady pipeline of clay coming from these flower pot. My slop was in a 50 gallon garbage can. This method makes the most plastic cl
  6. 18th Pennsylvania Dutch Pottery https://www.berksmontnews.com/opinion/a-look-back-in-history-earthenware-of-early-pa-dutch/article_6144ea74-f43f-11e8-ad4b-331f958de9c6.html http://selftaughtgenius.org/reads/pennsylvania-german-pottery
  7. I have built 2 tile presses from Frank Giogini's Tile book design. One for me and one for the classroom. They are especially good for pressed plaster molds with incised designs. Marcia
  8. Finished writing my article for PMI. Pieces selling well and I need to send more shipments to galleries. Back to throwing.



    1. glazenerd


      Congrats on the article. I know you spent many many hours researching and developing.

    2. Marcia Selsor

      Marcia Selsor

      almost as much time trying to send it thru dropbox!!!



  9. I put 2 foot rings on porcelain dinner plates. Probably serves the same function as Liam's button. I also trim when the clay is a bit stiff. Cut off the plate. I place a soft piece foam the keep the center from slumping if the clay is soft. Sandwich the plate with another bat and flip. Put it on the wheel trim and start drying. I flip the plates several times during the drying and dry them in a bakers rack wrapped with plastic. In Texas it was humid. In Montana it is dry. All depends on your studio atmosphere. Avoid drafts. Marcia
  10. I add alumina hydrate to my wax resist for bottoms of porcelain AND flanges on lids. I put about a cup in a jar and stir in about a tablespoon of alumina hydrate. Porcelain can flux enough to "pluck" or stick to shelves and where bare clay touches bare clay as in flanges. Alumina in the wax prevents that. Marcia
  11. As Liam says, follow the reference codes on the mason Stain http://www.masoncolor.com/reference-guide. You need to use a slip base that accommodates which ever stain you are using AND use a glaze that will enhance the color. Mason stains are expensive. You need to use them according to Mason's guidelines. One size does NOT fit all. Val Cushing base for low temperature underglaze use was Frit 3134 33%, EPK 33%, silica 33% then add stain 10-25% depending on the intensity of the stain and the hue you want. This is for low fire 06-04. You could possible re-formulate for what ever te
  12. I dry my large slabs between sheetrock boards lined with newsprint. I get end rolls from the local newspaper and have it on a gift wrap paper dispenser. I also was the edges as someone mentioned earlier that edges drying out first can cause warping. Marcia
  13. Franks sent me his 32 page Frits html that doesn't work. I also put it into a PDF. Not allowed. We need a tech person to let it get posted. Frank says enjoy! Marcia
  14. Frank Gaydos changed his website but he sent me the Frits.html. I have converted it to a 32 page pdf which is an unacceptable format. link buttons are dysfunctional on the old html. Can any of the techie's recommend how to post a pdf format? If sent as a jpg, each page was 298 k. Marcia
  15. Liam said "I'd say the biggest risk involved with barium for the Potter is inhalation of vapor during firing and inhalation of the raw material, this is a direct pathway to our internal organs. The occupational safety limit for airborne barium oxide is under half a milligram per cubic meter which is an extremely tiny amount, wear your respirator!" Dave Shaner attributes his decline to the fumes from his kiln. Hans Coper who also used manganese extensively, declined so much towards the end that he needed a rope alone the walk to his studio. Nervous system deterioration.
  16. Horse manure has more nitrogen. The Quezadas use it when they fire individual pots under a small bucket. There is no need to add iron to the over slip terra sig. It's absorbency allows the carbon to turn the pots black. Marcia
  17. Terrim8, Gary Holt's work is awesome. Are you using a gas kiln? Skiing open around end of Nov. I am doing low temperatures on porous porcelain in a Raku kiln. Photos are from pots I was packing up for galleries and customers.
  18. Here is the faux celadon recipe posted in my gallery in the discussion topics. It is ^6 oxidation. It is a little thicker on the vase above.
  19. It isn't something mentioned in everyday conversation. You need to be proactive in researching what you are using. You can check individual materials MSDS sheets. Check some of the Black clays for example for their manganese content. When I was teaching at the university, we had to eliminate Barium from the studio back in the 80s. https://www.hazwastehelp.org/ArtHazards/ceramics.aspx https://emergency.cdc.gov/agent/barium/casedef.asp We do know that Hans Coper and Dave Shaner were both poisoned by Manganese in their work and eventually died from it. . It is good to be awar
  20. The de-airing is suppose to eliminate the need to wedge. Try as Rae suggests. Marcia
  21. Dannon Rhudy suggested decades ago on Clayart, to tie jean legs win a knot, hang on a clothes line and fill with slop and Ley it dry. I try to keep up with my porcelain slop and add some of Glaze Nerd's additive to restore plasticity. (recipe is the studio)Then I dry pn plaster slabs or in large plaster bowl forms. I also like to use the wet tee shirt soaking system for softening hard clay (found on youtube) and the softening of hard bagged pugged clay by putting the bag in a 5 gallon buckets, add a 1/2 cup od water and tie the bag shut and let it sit for a day or two. If it needs
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