{"product_id":"hawthorn-fire-clay-for-cob-ovens-rmhawbon50co","title":"Hawthorn 35M Fire Clay For Cob Ovens- 50Lb Bag Delivered Price","description":"\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eYou must test before you use it, at any scale.\u003c\/strong\u003e Raw materials, mined or man-made, are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003ch2 class=\"abz-seo-product\"\u003eHawthorn Clay For Cob Ovens:\u003c\/h2\u003e\n\u003ch2 class=\"abz-seo-product\"\u003eHAWTHORN BOND 35M Fire Clay- 50lb Bag Dry Clay\u003c\/h2\u003e\n\u003cp\u003ePeople use many different types of clay for backyard ovens for bread and pizza and more. We recommend Hawthorn Fire Clay Mix because of it's workability and affordability. \u003cbr\u003eThis dry clay is much less expensive than a \"potter's clay\" which is usually a moist clay with fluxes and glass formers which are not needed for a clay oven.\u003cbr\u003e \u003cspan style=\"text-align: center;\"\u003eThis\u003c\/span\u003e\u003cspan style=\"text-align: center;\"\u003e fire clay mix will be delivered to you via speedy US Postal or UPS. Depending on your location, 50 pound bags of plasters may ship UPS \u003c\/span\u003e\u003cbr style=\"text-align: center;\"\u003e\u003cspan style=\"text-align: center;\"\u003eor may ship US Postal in two 25 pound units in a strong plastic bag which you can reseal with twist-ties that are included. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cb style=\"text-align: center;\"\u003eThe price shown is for the northeast United States (ME, NH, MA,RI, CT, VT, NY and NJ)\u003cbr\u003ePlease select \"zone B\" option which adds just $5 postage if you are not in one of those states. \u003cbr\u003e\u003c\/b\u003e\u003cimg alt=\"Free Shipping Plasters Zone Map\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/raw-mats-zone-map.jpg?v=1684313302\" style=\"text-align: center;\"\u003e\u003cbr\u003eCoarse fire clay mix (either 20 or 35 mesh) is \"toothy\" so it is a good clay for any kind of adobe construction.\u003cbr\u003eFor this type of oven building, people will mix the clay in various proportions with chopped straw and sand.\u003cbr\u003eMasonry sand is always recommended over \"play sand\" : Play sand is usually a river-run sand so the particles are smooth and round making it suitable for a sand box, where a mason's sand is a more block-like shaped particle which microscopically stacks like tiny bricks making it suitable as an aggregate in cement, mortar and clay or adobe blends.\u003c\/p\u003e\n\u003cp\u003eClay adobe ovens do not get hot enough to actually turn the clay to hardened ceramic like it would in a kiln firing. The cob oven clay will be quite hard to the touch but will turn soft again in rain so backyard ovens should have a shed roof or some other way to protect it from the elements. Some folks add some Portland cement, especially in a finish coat to help give a bit more water resistance.\u003c\/p\u003e\n\u003cp\u003eWe offer this fire clay mix for it's use in pottery making. Since oven building is beyond the scope of the manufacturers' recommendations to use this for oven building projects, we cannot really guarantee it's performance. All we can say is that , people have told us that it works well !!! So TEST TEST TEST !!! It is up to you to make sure this Hawthorn clay is going to work with your methods.\u003c\/p\u003e\n\u003cp\u003eThe items people order from us for their oven building projects are \u003ca href=\"https:\/\/www.sheffield-pottery.live\/collections\/hard-bricks-firebrick\"\u003efire brick\u003c\/a\u003e and \u003ca href=\"https:\/\/www.sheffield-pottery.live\/collections\/high-alumina-cone-11-kiln-shelves\"\u003ekiln shelves\u003c\/a\u003e. Our high temperatures bricks are used as the floor and or walls of the oven. Kiln shelves are commonly used as a nice smooth floor or like a pizza stone. Again, these applications are beyond the normal usage for these materials. Kiln shelves are not FDA rated for food. We make no claim as to their suitability, all we know is that pizza and bread makers order this Hawthorn clay all the time!\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-weight: bold;\"\u003eIN STORE PICKUP\u003c\/span\u003e\u003cbr\u003eYou must call 24 hours in advance of your visit to pickup clay and other raw materials\u003c\/p\u003e\n\u003cp\u003eQuantity discounts and Bulk available. Please call to order large quantities. 888.774-2529\u003c\/p\u003e\n\u003cp\u003eA plastic fireclay exhibiting outstanding plasticity and workability.\u003cbr\u003ePCE 31-32 \u003cbr\u003eFiring Temperature 1800F 2000F 2200F 2400F \u003cbr\u003eApproximate Cone (Small) 08 04 4 9 \u003cbr\u003eDry Shrinkage (%) 1.7 4.4 8.5 N\/A \u003cbr\u003eFired Shrinkage (%) 4.2 7.9 11.4 11.7 \u003cbr\u003eFired Color Tan-Pink Tan Yellow Gray-Yellow \u003cbr\u003eLOI (%) 12.99 12.92 13.67 N\/A\u003c\/p\u003e\n\u003cp\u003eSiO2 47.1 - 53.3% \u003cbr\u003eAl2O3 30.3 - 32.1% \u003cbr\u003eFe2O3 1.3 - 1.7% \u003cbr\u003eTiO2 1.7 - 2.2% \u003cbr\u003eK2O 0.6 - 1.0% \u003cbr\u003eMgO 0.2 - 0.4% \u003cbr\u003eCaO 0.3 - 0.5% \u003cbr\u003eNa2O 0.1 - 0.3% \u003cbr\u003eP2O5 0.1 - 0.3% \u003cbr\u003eLOI 10.5 – 15.55%\u003cbr\u003e\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"Default Title","offer_id":45113724567874,"sku":"RMHAWBON50CO","price":62.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/white-RMHAWBON50CO-2.jpg?v=1696878249","url":"https:\/\/www.sheffield-pottery.live\/products\/hawthorn-fire-clay-for-cob-ovens-rmhawbon50co","provider":"Sheffield Pottery Inc.","version":"1.0","type":"link"}