{"id":1854,"date":"2023-05-30T23:01:48","date_gmt":"2023-05-30T23:01:48","guid":{"rendered":"https:\/\/themccorrycollection.com\/tmcpottery\/blog\/?p=227"},"modified":"2023-05-30T23:01:48","modified_gmt":"2023-05-30T23:01:48","slug":"part-1-testing-a-new-glaze-combination","status":"publish","type":"post","link":"https:\/\/themccorrycollection.com\/tmc\/db\/part-1-testing-a-new-glaze-combination\/","title":{"rendered":"Part 1 Testing a New Glaze Combination:"},"content":{"rendered":"\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Testing a New Glaze Combination: Part 1 #pottery #clay #potteryshorts #ceramics\" width=\"580\" height=\"326\" src=\"https:\/\/www.youtube.com\/embed\/SZMhz5sENB0?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>This article focuses on the process of adjusting a new pottery glaze combination and conducting tests using test tiles<\/p>\n\n\n\n<p>Part A: Adjusting Specific Gravity<\/p>\n\n\n\n<p>To begin, let\u2019s aim for a specific gravity of approximately 1.46 for our Tenmoku pottery Glaze, currently, the specific gravity of this glaze stands at 1.52<\/p>\n\n\n\n<p>To rectify this, we will add water to the glaze batch. It\u2019s important to thoroughly mix the contents and periodically test the specific gravity as water is added<\/p>\n\n\n\n<p>Here\u2019s how<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 1<\/h4>\n\n\n\n<p>Place an empty graduated cylinder on a scale and zero the scale<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 2<\/h4>\n\n\n\n<p> Pour 350 ml of glaze into the cylinder and record the weight<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 3<\/h4>\n\n\n\n<p>Divide that weight by 350 ml, and the resulting figure represents the specific gravity of the glaze<\/p>\n\n\n\n<p>For example, if the glaze weighs 513 grams, dividing it by 350 ml would yield a specific gravity of 1.465<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Part B: Dip Testing and Clay Bodies<\/h4>\n\n\n\n<p>Dip testing involves immersing test tiles into the pottery glaze to assess its color, texture, and interaction with different clay bodies. Each clay body possesses unique characteristics and chemistries that can influence the glaze in distinct ways. Matching the appropriate clay body to the right glaze offers numerous advantages, including the prevention of crazing (thermal expansion issues)<\/p>\n\n\n\n<p>To conduct dip tests, gather the following materials: bisque test tiles, the glaze batch you want to test, and a small plastic cup<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 1<\/h4>\n\n\n\n<p>Pour the glaze into the plastic cup and have your test tiles ready<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 2<\/h4>\n\n\n\n<p>Dip the tile only three-fourths of the way down, allowing some room for the glaze to run<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 3<\/h4>\n\n\n\n<p>If you\u2019re testing a glaze that tends to be runny, ensure the kiln shelf is protected with a saucer or glaze catcher<\/p>\n\n\n\n<p>In Part 2, we will explore testing the pottery overlay glaze in conjunction with this new combination. We will discuss phase separation (also known as variegation or break out glazes) and examine the effects, or lack thereof, on glaze chemistry when layering glazes<\/p>\n\n\n\n<p>Happy potting to you! \ud83d\ude00<\/p>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p>Check out more of our daily posts! <\/p>\n\n\n\n<div class=\"wp-block-buttons has-custom-font-size has-small-font-size is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-font-size is-style-outline colorBl has-small-font-size is-style-outline--1\"><a class=\"wp-block-button__link has-primary-color has-text-color has-background wp-element-button\" href=\"https:\/\/themccorrycollection.com\/tmcpottery\/blog\/category\/daily-updates\/\" style=\"border-radius:10px;background-color:#a0ff96\">Daily Updates<\/a><\/div>\n<\/div>\n\n\n\n<p>Join Us On Our Pottery Journey &amp; Follow Our <a 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the specific gravity of this glaze stands at 1.52 To rectify this, we will [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"slim_seo":{"title":"Part 1 Testing a New Glaze Combination: - TMC | Blog","description":"https:\/\/www.youtube.com\/shorts\/SZMhz5sENB0 This article focuses on the process of adjusting a new pottery glaze combination and conducting tests using test 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