{"product_id":"masa-witgert-27-sf-25-0-0-2mm-black-stone-10kg","title":"Witgert 27 SF 25% 0.5–2.0mm Black Stone Clay 10kg","description":"\u003ch3 data-start=\"0\" data-end=\"70\"\u003eWitgert 27 Black Stone clay – coarse-grained, effective stoneware clay\u003c\/h3\u003e\n\u003cp data-start=\"72\" data-end=\"382\"\u003e\u003cstrong data-start=\"72\" data-end=\"94\"\u003eWitgert 27 Black Stone\u003c\/strong\u003e is a plastic, coarse-grained stoneware clay with 25% black grog, particle size 0.5–2.0 mm. Depending on the firing temperature, the body changes from light grey to grey and dark grey. The visible black grains emphasize the texture and give the work a raw, stone-like character.\u003c\/p\u003e\n\u003cp data-start=\"384\" data-end=\"400\"\u003e\u003cstrong data-start=\"384\" data-end=\"400\"\u003eCharacteristics:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli data-start=\"402\" data-end=\"455\"\u003e\n\n\u003cstrong data-start=\"404\" data-end=\"420\"\u003eFired color:\u003c\/strong\u003e light grey, grey to dark grey\u003c\/li\u003e\n\n\u003cli data-start=\"457\" data-end=\"514\"\u003e\n\n\u003cstrong data-start=\"459\" data-end=\"472\"\u003eApplication:\u003c\/strong\u003e hand-building, slab work, and sculpture\u003c\/li\u003e\n\n\u003cli data-start=\"516\" data-end=\"560\"\u003e\n\n\u003cstrong data-start=\"518\" data-end=\"524\"\u003eForm:\u003c\/strong\u003e plastic clay, packed in 10 kg bags\u003c\/li\u003e\n\n\u003cli data-start=\"562\" data-end=\"602\"\u003e\n\n\u003cstrong data-start=\"564\" data-end=\"590\"\u003eFiring temperature range:\u003c\/strong\u003e 1000–1250°C\u003c\/li\u003e\n\n\u003cli data-start=\"604\" data-end=\"664\"\u003e\n\n\u003cstrong data-start=\"606\" data-end=\"624\"\u003eGrog content:\u003c\/strong\u003e 25% black grog, grain size 0.5–2.0 mm\u003c\/li\u003e\n\n\u003cli data-start=\"666\" data-end=\"700\"\u003e\n\n\u003cstrong data-start=\"668\" data-end=\"689\"\u003eDrying shrinkage:\u003c\/strong\u003e approx. 4.7%\u003c\/li\u003e\n\n\u003cli data-start=\"702\" data-end=\"767\"\u003e\n\n\u003cstrong data-start=\"704\" data-end=\"723\"\u003eFiring shrinkage:\u003c\/strong\u003e 1.7% at 1000°C; 3.4% at 1100°C; 4.1% at 1200°C\u003c\/li\u003e\n\n\u003cli data-start=\"769\" data-end=\"841\"\u003e\n\n\u003cstrong data-start=\"771\" data-end=\"796\"\u003eWater absorption after firing:\u003c\/strong\u003e 12.0% at 1000°C; 7.5% at 1100°C; 4.6% at 1200°C\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp data-start=\"845\" data-end=\"1192\"\u003eThe clay is primarily intended for sculpture, pots, decorative objects, slab forms, and hand-modeling. It works well with projects where a visible material structure and a natural stone effect are important. The stony, raw character of this clay complements minimalist, industrial interior design and gardens well.\u003c\/p\u003e\n\u003cp data-start=\"1194\" data-end=\"1455\"\u003e\u003csmall data-start=\"1194\" data-end=\"1455\"\u003eThe parameters provided are indicative. The final color, shrinkage, water absorption, and glaze behavior depend on the kiln, atmosphere, soaking time, and firing curve. Before producing a larger series, we recommend a technological test with the chosen clay and glaze.\u003c\/small\u003e\u003c\/p\u003e","brand":"Witgert","offers":[{"title":"Default Title","offer_id":54394313769287,"sku":"W-27SF2502","price":64.9,"currency_code":"PLN","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0613\/2423\/0853\/files\/ChatGPTImage24lip2026-16-02-40-_1.png?v=1787957728","url":"https:\/\/alike.live\/en\/products\/masa-witgert-27-sf-25-0-0-2mm-black-stone-10kg","provider":"Alike Pottery Studio","version":"1.0","type":"link"}