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Magnolia Mud Research

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About Magnolia Mud Research

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    ceramic chemistry

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  1. I have stainless steel table knives sharpened and reshaped into trimming tools. A spoon sharpened into a tool for cutting foot rings on tea bowls a serving spoon bent to form a chattering tool, and the 'of course' use of that thing-aha-my-jig that was originally sold to pastry chefs for making pie crusts and is now used make thin slabs of clay out of thick ones; aka the rolling pin. LT
  2. The issue with Laguna Iron Phoenix glaze...

    or maybe it just don't matter. LT
  3. single firing, cone 6 stoneware

    ... an intriguing idea ... it would require standing up, walking 25 meters from the throwing studio to the 'scrap barrel" in the glazing studio and returning without my hands drying or dripping. LT
  4. Ian Currie Test Tiles Forums?

    Joseph, Good ideas worth consideration. I use the Currie tile as a quick technique to cover a wide range of composition(s) for the purpose of 'zeroing in' to a range that will justify detailed effort. My preferred glaze test tile is an inverted "T" with stamped details similar to what I use on my work. These are extruded (about 3-4 inch tall inverted "T") and cut to about 1.5 inch wide (wet). These are used for line blends over a narrow range. Yes they may take more kiln space, but their purpose is different than the Currie tile. Also the narrowed line blend needs less tiles therefore less kiln space. I also work on one glaze at a time. LT
  5. Ian Currie Test Tiles Forums?

    Currie grid tiles I prefer stretch-throwing slabs followed by compressing and smoothing the surface with a rolling pin or a squeegee. I then place a tar paper template on the tile, trim the outside dimensions, and make the indentations with a purposely made stamp - currently the end of a broken tree limb shaped into a square. The stamp provides some texture that helps evaluate the 'breaking' tendency of the melt. Making a tile takes less than five minutes start to finish and only needs about 18 inches of work space and nearly zero of storage space for the template and stamp. The stamp is then available for other decorative effects. I have thought about making a wooden drape mold, but it requires ~40 individual stamps and a lot more storage space. After a making a few tiles it is easy to estimate the correct amount of clay needed for a tile. A good starting amount is by volume: V = width x length x thickness in cm. Take that amount of soft clay and make the flat smooth tile. My tiles are about 16 x 26 x 1 cm and I start with about 15x15x2.5 (cm) chunk of clay from the bag and wedge it into a cube before starting the stretch-throwing technique. When there is not sufficient space to throw, I just use a mallet to 'beat the clay into shape'! LT
  6. single firing, cone 6 stoneware

    Scrap glaze At the college we have more than 10 glazes ranging from clear through the whole spectrum to black and white, along with a barrel of 'wash water' where the stirrer is washed. Any unused glaze from testing assignments or "whatever experiments" along with leftover glazes goes into a 10 gallon barrel labeled "scrap." Scrap is constantly changing. It is used to glaze the insides of bottles and jugs. It is often used as a background coat for applying contrasting texture, color, or 'value' (light-dark) glazes over it. Even after 5 years the scrap barrel has not overflowed. We did have it go to almost empty a couple of semesters ago. Some students prefer scrap because it is always interesting . I always use the "wash water" to tint the "unglazed" areas on vases, bowls, sculpture, and foot rings. lt
  7. Ways To Make Square Forms\Urns

    I make canisters using a half gallon melk carton as a form. After crushing the sharp corners on the carton to reduce the likelihood of cracks at the corners, the carton is wrapped with two separate layers of newsprint (one to layer to stick to the clay and one to stick to the carton). A long continuous slab is the wrapped around the carton to form the vertical walls of the canister. I overlap the ends of the slab to create an obvious vertical line at the join (my aesthetic). I work with wet floppy slabs so the joins are lightly dampened with vinegar and compressed thoroughly. The photo is of a small cup made using this technique. It takes longer to prepare the form and roll the slabs than it takes to assemble the item. The photos are of a cup made with the technique.
  8. Ian Currie Test Tiles Forums?

    Actually the author is Tom Turner.
  9. Stoneware Limit Study

    Nerd, Please elaborate on how ammonium chloride increases the "oxidation level" . I agree with Tyler re ammonium chloride. Ammonium chloride is the product of the reaction between Hydrogen Chloride (HCL) and Ammonia (NH3). The equilibrium favors ammonium chloride (solid and/or liquid) at ambient temperatures. At higher temperatures and atmospheric pressure the equilibrium favors decomposition to ammonia and hydrogen chloride gases. The details of the equilibrium can be found in just about any Physical Chemistry Textbook. The Wikipedia entry NH4Cl refers to: Wiberg, Egon; Wiberg, Nils (2001). Inorganic Chemistry (illustrated ed.). Academic Press. p. 614. ISBN 0-12-352651-5. for more details] . Significant amounts of chlorides in high temperature equipment usually leads to significant corrosion unless the materials of construction for the equipment are carefully selected. LT
  10. Signing Your Work, What Is Your Method?

    Take a paperclip and needle nose pliers, then make yourself a 'branding iron' LT
  11. Reducing thermal conductivity

    A drinking vessel for hot beverages will usually be cooler than the hot liquid poured into the vessel -- handle or no handle! If the outside of the container is hotter than you can hold with your hand, the liquid inside is guaranteed to be too hot to drink without damaging the surfaces in your mouth and throat. It is just pure physics. LT
  12. New Forum

    An operator's manual would be nice.
  13. Pkqw: Week 23

  14. Do I Fix My Damaged Sculpture Before Or After Firing?

    When repairing work with slip, I make the slip from the same clay body. Some time this requires drying some of the clay to bone dry to use to make the slip. To hurry this up I pound out slabs around 1 mm thick and dry with a heat lamp, then crush the slabs in a dry blender. lt