While firing, individuals with lung or respiratory problems may be affected by the smoke created. Keeping Bronze Clay Moist While You Are Working As soon as bronze clay is exposed to the air, the moisture in the clay begins to evaporates and the clay starts to dry out, which can cause cracking or premature hardening. 11. Please keep in mind that these instructions are for the Original BRONZclay formula. Monday, 17 November 2008. Place the dried piece (or pieces) on a stainless steel mesh and put it into the pre-heated kiln at 500C/932F, or on a kitchen stove. Over the next few weeks, Im going to try to run regular blog posts about my metal clay experiments. What came out of the firing pan was basically a pile of bronze dust. I fired it in the coal medium, wanting the patina, as advertised. General instructions on firing homemade metal clay. Clay was totally dry as it had been in greenware stage for over 24 hours. Proceed with caution when drying. Turn the hob back on. Buried in coal carbon in stainless steel firing pan (carbon purchased from WLW and never used before) Ramped at 250 per hour to 1516, held for 3.5 hours. Electric kilns may show slight deviations, due to their temperature control systems and isolations. 3. Before firing your works, test your kiln's accuracy by firing a small piece of clay. As soon as bronze clay is exposed to the air, the moisture in the clay begins to evaporates and the clay starts to dry out, which can cause cracking or premature hardening. So, as with any metal clay, it's important to actively keep the moisture inside the clay. STEP 1. Everything went well up to the firing. So.I knew this would happen. It can be hammered and forged; it can be textured; if it's fine silver, it can be fused to other fine silver; and it can be soldered! Place the protective cover over the metal clay. The original BRONZclay formula (and most other bronze clay formulas): Must be fired in activated carbon. But when I then fired some pendant shapes they turned black as soon as they were out of the kiln and were brittle and all It is a lot easier to do this step now - before you have fired the clay. Fire at the temperature of the lowest fire clay / 2 hours CARBON FIRING METHOD Two Step Method COPPER CLAY Step 1 On steel mesh / In pre-heated kiln 1100F / 593C 10 minutes Before the firing. Cut away the excess clay from around the inner frame. Your metal clay will flame for a few seconds as the binder in the clay burns off. This is a 2-step-method. Immediately place your design on the hottest part of the firing mesh using a pair of tweezers. Bronze clay reacts with oxygen in the air to create oxides that interfere with the sintering process. Fire following the new low-firing schedule. Allow the kiln to cool to 1000F, then remove the kiln lid completely and finish cooling the pan in the firing chamber. In a bisqueware crucible* I put of coconut activated charcoal** and then laid my raw bronze clay pieces on top. A couple of weeks ago, I posted that I was having trouble firing bronze clay. The last few batches did not fire/sinter correctly. BronzClay firing problems. I also started trying to make hollow forms in the bronze clay. Turn the hob off. 4. The last few batches did not fire/sinter correctly. Bronze metal clay: Firing Schedule: 1525F (830C) for 2 hours (after a fast ramp to temperature) Composition: 10% tin, 90% copper, water & binding materials: Brand: FASTfire Bronz Clay: Shrinkage: 5-10 % approx. Firing Prometheus White Bronze Clay. Wear gloves and safety glasses, use tongs, paddles when loading and unloading a kiln. And after it's fired, metal clay is metal, too. Programmed my digital kiln for the right ramp time, holding time, etc. 3. A reduced atmosphere is created by burning materials in the kiln that uses up oxygen. Firing an electric kiln in a reduced atmosphere shortens the life of the elements. Metal is metal, after all. Finishing Prometheus Bronze Clay Brush your piece with a metal brush and, if necessary, put it in hot pickling solution. (*) After pickling, rinse the piece thoroughly with water and dry. This will give you a nice warm reddish bronze color. Dry. Firing large pieces, like sculptures, is best done in a furnace with a smoke extractor. The photos below show how to tell if you need to raise or lower your target temperature to correct the problem. can be found: FeltMagnet BRONZclay Bronze Metal Clay Jewelry Techniques A comprehensive guide to working with Metal Adventures' original 2. Fire for 5 minutes. Prometheus bronze clay has a minimum firing time of 7 minutes, during which the sintering process takes place. Once the kiln has been crash-cooled, and the firing container lid removed, You can cool BRONZclay pieces rapidly by quenching in water if there are no stones embedded. Metal Clay (74), bronze clay (10), Bronz Clay (7) Related products. The last few batches did not fire/sinter correctly. Video tutorial of conventional kiln firing for Prometheus Bronze Clay. Firing Prometheus Bronze Clay Before firing your works, test your kilns accuracy by firing a small piece of clay. It can be molded, textured, even turned on a potter's wheel. Prometheus Bronze Clay can be fired with most lab-created gemstones (cubic zirconias), pre-tested natural stones, glass beads, ceramic porcelain and Prometheus Metal Clays. When PBC is fired in a kiln, the organic binder evaporates, burns away and youre left with pure, solid bronze. Remember Prometheus bronze clay shrinks about 6-10%, so make sure the jewellery piece youre working on has been measured to account for the shrinkage that takes place during firing. Roll a layer of White Bronze, 1 card thick. Found it easier to work with, consistency-wise, than instructions had warned. To minimize the clay's exposure to oxygen during firing, the unfired clay is buried in activated carbon granules during the firing process. (you can see an image of this in my introductory blog Dust, Rust and Pine) Then I placed the crucible on top of three stacks of two kiln posts. One big note on these clays: That black stuff that often appears on these clays after firing is nothing more than oxidation: a chemical process that occurs when base metal clays are exposed to oxygen. Make your piece as if the White Bronze were the backing layer. I had some problems with the second firing I did in the class. Fire it for 15 minutes, take it on to a fireproof surface and let it cool down. Thoughts and ideas about metal clay. Soon the piece will begin to glow. Clay was totally dry as it had been in greenware stage for over 24 hours. So.I knew this would happen. or Distilled Water to a form a crumbly clay then mix crumbly clay until all the water is absorbed. More info. Product tags. They all came out looking very dull, with a deep matte dark or black patina. By jen March 3, 2010 October 7, 2016 bronze clay, firing problems. BronzClay cannot be torch fired. Continue to heat the clay until the binder burns away, leaving you with a piece of bronze metal that is glowing red. By jen March 3, 2010 October 7, 2016 bronze clay, firing problems 6. Then I moved up to a Paragon Max 119 kiln so I could fire cone 6 pottery as well as glass and metal clay. Phase Two of the Firing: Because the recommendation mentions during Phase 2 that the crucible should be covered (although they also recommend using a stainless steel crucible) I used a kiln shelf to cover the crucible during Phase Two. Buried in coal carbon in stainless steel firing pan (carbon purchased from WLW and never used before) Ramped at 250 per hour to 1516, held for 3.5 hours. Please see the previous two videos to see how we got to this point. I found this article by Mardel Rein to be invaluable. The Prometheus MiniKiln PRO-1 is a brilliant little kiln, suitable for both personal and professional There is a fine line between Clay being right and too wet. Cover bronze clay items with a layer of coconut charcoal about thick. Bronze Clay and Copper Clays. 3. 10. By jen March 3, 2010 October 7, 2016 bronze clay, firing problems 6. If the clay becomes too wet let it sit uncovered until the evaporation of water allows it to be the right consistency. Going too far below or over the correct temperature can result in a firing failure. I discovered something very interesting yesterday which I think is pretty important for anyone working with bronze clay. What came out of the firing pan was basically a pile of bronze dust. Need some advice about Bronze Metal Clay I recently decided to give the new bronze metal clay a try. To clean off the oxidation you can either use a radial bristle brush or drop it (after quenching it in water) in a pickle solution. 2. BRONZclay brand clay is fired within a narrow range of temperatures. Electric kilns may show slight deviations, due to their temperature control systems and isolations. Detailing as much as I can about the whole process. 9. Now start a timer. Let rest for at least 30 mins to allow the clay to settle So.I knew this would happen. What was done exactly to potentially cause a success (we hope!) Despite its challenges and idiosyncrasies, more and more metal clay artists are working with bronze clay because of its affordable cost and advantageous qualities. Hopefully, this will help those of you struggling with firing problems, and will also serve as a reference for myself. I was having problems with under firing and over firing, so I needed to tweak my firing schedule. Here are five different common bronze clay firing problems you should be aware of: Think about shrinkage. So I soldered the ring design portion onto its new band. A couple of weeks ago, I posted that I was having trouble firing bronze clay. According to your test result, you may change the firing temperature by 5% (up or down) until you reach to the correct sintering. When it finally It must be fired in a kiln, inside a stainless steel box, buried in carbon. A couple of weeks ago, I posted that I was having trouble firing bronze clay. Phase One of firing What came out of the firing pan was basically a pile of bronze dust. or failures. Use a slotted spoon to sift pieces out of the carbon. The pieces were completely bone dry. As long as the charcoal used in firing bronze clay is held in a container such as stainless steel that includes a good lid, your kiln should be okay. Hi I made some small test pieces of copper clay (Creative brand) and fired them according to the manufacturers instructions (covered with kiln blanket and fired at 920C for 30 mins, then put in picklean for 10 mins) and they came out beautifully. BRONZE & SUNNY BRONZE CLAY 1508F/ 820C 30 minutes www.clayrevolution.com COMBINING METALS All Prometheus clays can be combined and fired together in one firing. Sintering the Bronze Metal Clay Sintering happens during the firing process. So, as with any metal clay, it's important to actively keep the moisture inside the clay. Firing Prometheus Bronze Clay. Fire in a well-ventilated place or under a kitchen extractor fan. Lay it on the copper piece.
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