{"product_id":"iron-oxide-spanish-red-1-pounds","title":"Iron Oxide, Spanish Red","description":"\u003cp\u003e\u003cstrong\u003eThe most useful colorant in pottery: ambers, browns, celadons, tenmokus, and warm red-brown clays and slips.\u003c\/strong\u003e\u003c\/p\u003e\n\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\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA fine red powder: iron oxide, the same compound as rust. It's the go-to colorant for warm colors. It gives honey and amber in a clear glaze, browns and blacks at higher amounts, and pale green celadons in a gas kiln fired in reduction (with less oxygen). It also warms and darkens clay bodies and slips.\u003c\/p\u003e\n\u003ch3\u003eGetting started\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIn a clear glaze, about 1 to 3% (1 to 3 grams per 100 grams of dry glaze) gives honey to amber, 4 to 7% medium to dark brown, and 8 to 12% very dark brown to black.\u003c\/li\u003e\n\u003cli\u003eFor celadon in a gas reduction kiln, start at 0.5 to 2%.\u003c\/li\u003e\n\u003cli\u003eIn clay or slip, start around 2 to 5%.\u003c\/li\u003e\n\u003cli\u003eResults change a lot between electric and gas kilns. Fire a test tile in your own kiln.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFor glaze formulators\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRed iron oxide, Fe₂O₃.\u003c\/li\u003e\n\u003cli\u003eA strong flux in reduction, where it converts to FeO, so high-iron glazes run more in gas kilns than in electric ones.\u003c\/li\u003e\n\u003cli\u003eHigh-iron glazes can bubble or blister as the iron gives up oxygen in firing.\u003c\/li\u003e\n\u003cli\u003eName note: this material was sold as \"Superfine\" and is now sold as Micronox. It's the same material.\u003c\/li\u003e\n\u003cli\u003eThe product photo is a general one; color tone varies from lot to lot.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLow toxicity, but don't breathe the dust. Wear a NIOSH-approved respirator (N95 or better) when handling it dry, and clean up with a wet sponge, not a broom.\u003c\/li\u003e\n\u003cli\u003eIt stains skin, clothes and work surfaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSizes \u0026amp; pricing\u003c\/h3\u003e\n\u003ctable style=\"width:100%;max-width:520px;border-collapse:collapse;border:0;margin:0 0 14px;font-variant-numeric:tabular-nums;line-height:1.35;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"padding:0 0 6px;border:0;border-bottom:2px solid #d9d0c4;background:transparent;font-size:12px;letter-spacing:.06em;text-transform:uppercase;font-weight:600;color:#6b6259;text-align:left;width:40%;\"\u003eSize\u003c\/th\u003e\n\u003cth style=\"padding:0 0 6px;border:0;border-bottom:2px solid #d9d0c4;background:transparent;font-size:12px;letter-spacing:.06em;text-transform:uppercase;font-weight:600;color:#6b6259;text-align:right;padding-left:12px;\"\u003ePrice\u003c\/th\u003e\n\u003cth style=\"padding:0 0 6px;border:0;border-bottom:2px solid #d9d0c4;background:transparent;font-size:12px;letter-spacing:.06em;text-transform:uppercase;font-weight:600;color:#6b6259;text-align:right;padding-left:12px;\"\u003ePer lb\u003c\/th\u003e\n\u003cth style=\"padding:0 0 6px;border:0;border-bottom:2px solid #d9d0c4;background:transparent;font-size:12px;letter-spacing:.06em;text-transform:uppercase;font-weight:600;color:#6b6259;text-align:right;padding-left:12px;\"\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:left;\"\u003e1 lb\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;\"\u003e$3.05\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;color:#6b6259;\"\u003e$3.05\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;\"\u003e\u003ca href=\"\/cart\/add?id=49598731387202\u0026amp;quantity=1\" style=\"color:#2340a8;font-weight:600;font-size:13px;text-decoration:none;white-space:nowrap;\"\u003eAdd to cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:left;\"\u003e5 lb\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;\"\u003e$14.50\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;color:#6b6259;\"\u003e$2.90\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;\"\u003e\u003ca href=\"\/cart\/add?id=67286165225843\u0026amp;quantity=1\" style=\"color:#2340a8;font-weight:600;font-size:13px;text-decoration:none;white-space:nowrap;\"\u003eAdd to cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:left;\"\u003e10 lb\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;\"\u003e$28.00\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;color:#6b6259;\"\u003e$2.80\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;\"\u003e\u003ca href=\"\/cart\/add?id=67286165258611\u0026amp;quantity=1\" style=\"color:#2340a8;font-weight:600;font-size:13px;text-decoration:none;white-space:nowrap;\"\u003eAdd to cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:left;\"\u003e25 lb\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;\"\u003e$67.50\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;color:#6b6259;\"\u003e$2.70\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;\"\u003e\u003ca href=\"\/cart\/add?id=67286165291379\u0026amp;quantity=1\" style=\"color:#2340a8;font-weight:600;font-size:13px;text-decoration:none;white-space:nowrap;\"\u003eAdd to cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:left;font-weight:700;\"\u003e55 lb bag\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;font-weight:700;\"\u003e$99.00\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;font-weight:700;\"\u003e$1.80\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;\"\u003e\u003ca href=\"\/cart\/add?id=67286165324147\u0026amp;quantity=1\" style=\"color:#2340a8;font-weight:600;font-size:13px;text-decoration:none;white-space:nowrap;\"\u003eAdd to cart\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"max-width:520px;margin:0 0 12px;padding:12px 14px;border-radius:8px;background:#eef3ee;border:1px solid #d6e3d7;\"\u003e\n\u003cp style=\"margin:0 0 10px;\"\u003e\u003cstrong\u003eFull bags mix and match.\u003c\/strong\u003e Every full bag in your order, of any raw material, adds up. That total sets the price of every bag. Smaller sizes don't count.\u003c\/p\u003e\n\u003ctable style=\"width:100%;max-width:520px;border-collapse:collapse;border:0;margin:0;font-variant-numeric:tabular-nums;line-height:1.35;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"padding:0 0 6px;border:0;border-bottom:2px solid #d9d0c4;background:transparent;font-size:12px;letter-spacing:.06em;text-transform:uppercase;font-weight:600;color:#6b6259;text-align:left;width:46%;\"\u003eFull bags in your order\u003c\/th\u003e\n\u003cth style=\"padding:0 0 6px;border:0;border-bottom:2px solid #d9d0c4;background:transparent;font-size:12px;letter-spacing:.06em;text-transform:uppercase;font-weight:600;color:#6b6259;text-align:right;padding-left:12px;\"\u003ePrice per 55 lb bag\u003c\/th\u003e\n\u003cth style=\"padding:0 0 6px;border:0;border-bottom:2px solid #d9d0c4;background:transparent;font-size:12px;letter-spacing:.06em;text-transform:uppercase;font-weight:600;color:#6b6259;text-align:right;padding-left:12px;\"\u003ePer lb\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:left;\"\u003eUnder 500 lb\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;\"\u003e$99.00\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;color:#6b6259;\"\u003e$1.80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:left;\"\u003e500 lb and up\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;\"\u003e$98.50\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;color:#6b6259;\"\u003e$1.79\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:left;\"\u003e2,000 lb and up\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;\"\u003e$98.00\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;color:#6b6259;\"\u003e$1.78\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:left;\"\u003e6,000 lb and up\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;\"\u003e$97.50\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;color:#6b6259;\"\u003e$1.77\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:left;\"\u003e12,000 lb and up\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;\"\u003e$97.00\u003c\/td\u003e\n\u003ctd style=\"padding:7px 0;border:0;border-bottom:1px solid #e6dfd5;background:transparent;text-align:right;padding-left:12px;color:#6b6259;\"\u003e$1.76\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin:0;font-size:13px;color:#6b6259;\"\u003ePrices from our October 23, 2026 price list.\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":49598731387202,"sku":"RMIROOXISR1","price":3.05,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67286165225843,"sku":"RMIROOXISR","price":14.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286165258611,"sku":"RMIROOXISR-10","price":28.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286165291379,"sku":"RMIROOXISR-25","price":67.5,"currency_code":"USD","in_stock":true},{"title":"55 Pounds","offer_id":67286165324147,"sku":"RMIROOXISR55","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/white-RMIROOXISR-2.jpg?v=1696880143","url":"https:\/\/www.sheffield-pottery.live\/products\/iron-oxide-spanish-red-1-pounds","provider":"Sheffield Pottery Inc.","version":"1.0","type":"link"}