{"product_id":"mason-stain-50gm-black","title":"Mason Stain 50gm - Black","description":"\u003cp\u003eMason Color has supplied high-performance ceramic pigments for over 40 years, used in pottery, artware, bricks, sanitary ware, and roofing materials.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMixing pigments\u003c\/strong\u003e\u003cbr\u003eMost stains can be mixed, but some are incompatible. If results vary, consult Mason Color.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePinks and crimsons\u003c\/strong\u003e\u003cbr\u003eRequire specific glaze chemistry: high calcium, low zinc and magnesia, and controlled boron. Best results come in an oxidizing firing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePurple turning blue\u003c\/strong\u003e\u003cbr\u003eOften due to insufficient calcium to support red tones in chrome-tin and cobalt blends.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBlack stains for grey\u003c\/strong\u003e\u003cbr\u003eBlack stains contain multiple oxides, so low percentages may shift colour. Use dedicated grey stains instead.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGreen turning brown\u003c\/strong\u003e\u003cbr\u003eZinc can cause chromium greens to brown. Remove zinc and increase calcium if needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFuzzy blue underglaze\u003c\/strong\u003e\u003cbr\u003eCobalt silicate can run; use cobalt aluminate or lower firing temperature.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMilky glaze\u003c\/strong\u003e\u003cbr\u003eCaused by excess boron, under-firing, or too much opacifier (over 2%).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSafety\u003c\/strong\u003e\u003cbr\u003eHarmful if inhaled. May irritate eyes and skin. Avoid dust and contact, use ventilation and protective gear, and wash after handling. Keep sealed and away from food. Refer to the current GHS Safety Data Sheet.\u003c\/p\u003e\n\u003cp\u003e```\u003c\/p\u003e","brand":"The Clay Centre","offers":[{"title":"Default Title","offer_id":44760407212055,"sku":"SQ4885038","price":14.9,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/7057\/2311\/files\/6600black_3jgvmmuk.3tm.webp?v=1773786186","url":"https:\/\/theclaycentre.co.nz\/products\/mason-stain-50gm-black","provider":"The Clay Centre","version":"1.0","type":"link"}