{"title":"Grogs and Sands","description":null,"products":[{"product_id":"pottery-clay-grog-20-mesh","title":"COARSE GROG (20 MESH)","description":"\u003cp\u003eFired \u0026amp; ground Missouri “flint” clay. A coarse aggregate added to clay bodies to prevent cracking of large forms by reducing dry shrinkage. Also used to create rough textured surfaces and colour variation in dark clay bodies. Finer kyanite and mullite grogs suitable for throwing are also available.\u003c\/p\u003e\n\u003cp\u003eFor more information on grog in general, see the \u003ca title=\"Grog\" href=\"https:\/\/digitalfire.com\/material\/828\" target=\"_blank\" data-mce-href=\"https:\/\/digitalfire.com\/material\/828\" data-mce-fragment=\"1\"\u003eDigitalfire.com Reference Library\u003c\/a\u003e of ceramic materials.\u003c\/p\u003e","brand":"PHS-ca","offers":[{"title":"5KG","offer_id":41780163018885,"sku":"MGRO4","price":17.0,"currency_code":"CAD","in_stock":true},{"title":"50lbs","offer_id":41780163051653,"sku":"MGROB","price":48.5,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0326\/8352\/4229\/products\/MGRO4.jpg?v=1646401448"},{"product_id":"kyanite-grog-100-mesh-1","title":"KYANITE GROG (100 MESH)","description":"\u003cp data-mce-fragment=\"1\"\u003eA fine grog added to clay bodies primarily to reduce stress from dry shrinkage. In clays fired above 1100º C, it fires off-white and begins to expand as it converts to mullite, effectively reducing the clay’s fired shrinkage.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eWith a little clay and sodium silicate, excellent refractory mortars can be made with kyanite.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eFor more information on kyanite, see the \u003ca title=\"Kyanite\" href=\"https:\/\/digitalfire.com\/material\/951\" target=\"_blank\"\u003eDigitalfire.com Reference Library\u003c\/a\u003e of ceramic materials.\u003c\/p\u003e","brand":"PHS-ca","offers":[{"title":"5KG","offer_id":41777794973829,"sku":"MK004","price":21.5,"currency_code":"CAD","in_stock":true},{"title":"50lbs","offer_id":41777795006597,"sku":"MK00B","price":48.75,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0326\/8352\/4229\/products\/MK004.jpg?v=1646403911"},{"product_id":"kyanite-grog-35-mesh-1","title":"KYANITE GROG (35 MESH)","description":"\u003cp data-mce-fragment=\"1\"\u003eSuitable for use in all clays (throwing too), 35 mesh kyanite is a medium coarse grog added to clay bodies primarily to reduce dry shrinkage stress that leads to cracking. In clays fired above 1100º C, it fires off-white and begins to expand as it converts to mullite, effectively reducing the clay’s fired shrinkage.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eWith a little clay and sodium silicate, excellent refractory mortars can be made with kyanite.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eFor more information on kyanite, see the \u003ca href=\"https:\/\/digitalfire.com\/material\/951\" title=\"Kyanite\" target=\"_blank\"\u003eDigitalfire.com Reference Library\u003c\/a\u003e of ceramic materials.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"PHS-ca","offers":[{"title":"5KG","offer_id":41777829642373,"sku":"MK354","price":18.5,"currency_code":"CAD","in_stock":true},{"title":"50lbs","offer_id":41777829675141,"sku":"MK35B","price":45.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0326\/8352\/4229\/products\/MK354.jpg?v=1646402234"},{"product_id":"kyanite-grog-48-mesh","title":"KYANITE GROG (48 MESH)","description":"\u003cp data-mce-fragment=\"1\"\u003eA medium grog added to clay bodies primarily to reduce stress from dry shrinkage. In clays fired above 1100º C, it fires off-white and begins to expand as it converts to mullite, effectively reducing the clay’s fired shrinkage.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eWith a little clay and sodium silicate, excellent refractory mortars can be made with kyanite.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eFor more information on kyanite, see the \u003ca href=\"https:\/\/digitalfire.com\/material\/951\" title=\"Kyanite\" target=\"_blank\"\u003eDigitalfire.com Reference Library\u003c\/a\u003e of ceramic materials.\u003c\/p\u003e","brand":"PHS-ca","offers":[{"title":"5KG","offer_id":41777796710533,"sku":"MK484","price":21.25,"currency_code":"CAD","in_stock":true},{"title":"50lbs","offer_id":41777796743301,"sku":"MK48B","price":59.27,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0326\/8352\/4229\/products\/MK484.jpg?v=1646402844"},{"product_id":"mullite-grog-100-mesh-1","title":"MULLITE GROG (100 MESH)","description":"\u003cp data-mce-fragment=\"1\"\u003eAlthough rare in nature (it’s named for the only known occurrence of it on the Scottish Isle of Mull), mullite is ubiquitous in ceramics. When clay is fired above 1100º C, a network of interlaced mullite needles forms, creating the strong internal scaffolding of stoneware and porcelain. Mullite grogs are made by calcining an aluminosilicate such as kyanite.\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eFor more information on mullite, see the \u003ca href=\"https:\/\/digitalfire.com\/material\/1054\" title=\"Mullite\" target=\"_blank\"\u003eDigitalfire.com Reference Library\u003c\/a\u003e of ceramic materials.\u003c\/p\u003e","brand":"PHS-ca","offers":[{"title":"5KG","offer_id":41777753063557,"sku":"MM004","price":26.25,"currency_code":"CAD","in_stock":true},{"title":"50lbs","offer_id":41777753096325,"sku":"MM00B","price":65.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0326\/8352\/4229\/products\/MM004.jpg?v=1646404770"},{"product_id":"mullite-grog-48-mesh-1","title":"MULLITE GROG (48 MESH)","description":"\u003cp\u003eAlthough rare in nature (it’s named for the only known occurrence of it on the Scottish Isle of Mull), mullite is ubiquitous in ceramics. When clay is fired above 1100º C, a network of interlaced mullite needles forms, creating the strong internal scaffolding of stoneware and porcelain. Mullite grogs are made by calcining an aluminosilicate such as kyanite.\u003c\/p\u003e\n\u003cp\u003eFor more information on mullite, see the \u003ca title=\"Mullite\" href=\"https:\/\/digitalfire.com\/material\/1054\" target=\"_blank\" data-mce-href=\"https:\/\/digitalfire.com\/material\/1054\"\u003eDigitalfire.com Reference Library\u003c\/a\u003e of ceramic materials.\u003c\/p\u003e","brand":"PHS-ca","offers":[{"title":"5KG","offer_id":41777767841925,"sku":"MM484","price":26.25,"currency_code":"CAD","in_stock":true},{"title":"50lbs","offer_id":41777767874693,"sku":"MM48B","price":65.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0326\/8352\/4229\/products\/MM484.jpg?v=1646404376"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0326\/8352\/4229\/collections\/Raw_Materials_1e07074d-74cd-4d36-98e6-f0fe18409d4d.png?v=1785337153","url":"https:\/\/psh.ca\/collections\/grogs-and-sands-1.oembed","provider":"The Pottery Supply House","version":"1.0","type":"link"}