{"product_id":"new-zealand-halloysite-kaolin-55-pounds-dry-rmnzkbag","title":"New Zealand Halloysite Kaolin","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\"\u003eNew Zealand Halloysite Kaolin Full Bag : 55 pounds dry\u003c\/h2\u003e\n\u003cp\u003eFrom Digital Fire:\u003cbr\u003eNew Zealand China Clays claim that this is the whitest clay in the world. The white primary clay deposits mined at Matauri Bay are derived from the alteration of acid volcanic rocks. The aluminosilicate feldspar minerals in the parent rhyolite have been broken down to their constituents by low temperature hydrothermal alteration and have then reconstituted as halloysite. Thus, while often called a kaolin, technically it is a halloysite.\u003c\/p\u003e\n\u003cp\u003eThe company has developed a unique beneficiation process (which includes filter pressing and thus the designation PFC or Premium Filter Cake) to ensure a high degree of purity for this New Zealand halloysite kaolin. They claim 0.1% on a 240 mesh screen\u003c\/p\u003e\n\u003cp\u003eThis kaolin material is exported to many parts of the world. Small scale users have found it a little whiter burning than Grolleg Kaolin. It also supports translucency better. As a pure material, NZK is much less plastic than pure Grolleg (being barely plastic enough to wedge and roll into a slab, for example). However Grolleg requires about the same amount of bentonite (or VeeGum) compared to NZK to create a porcelain of the same plasticity. This New Zealand halloysite kaolin responds especially well to VeeGum to create very plastic porcelains that still dry very well. \u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"1 Pound","offer_id":67286244524403,"sku":"RMNZK-1","price":4.4,"currency_code":"USD","in_stock":true},{"title":"5 Pounds","offer_id":67286244557171,"sku":"RMNZK-5","price":21.25,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286244589939,"sku":"RMNZK","price":41.5,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286244622707,"sku":"RMNZK-25","price":101.25,"currency_code":"USD","in_stock":true},{"title":"55 Pounds","offer_id":45113738756418,"sku":"RMNZKBAG","price":101.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/8drqkkp5f5-400W_1b55e6d9-2454-45ba-900d-8c78bb3b51ae.jpg?v=1791876722","url":"https:\/\/www.sheffield-pottery.live\/products\/new-zealand-halloysite-kaolin-55-pounds-dry-rmnzkbag","provider":"Sheffield Pottery Inc.","version":"1.0","type":"link"}