The stages of clay are the backbone of reading the clay, because what you can do with it depends on how wet it is. Oxford Clay’s blog post by Katherine Tomlinson, a potter of more than 25 years, walks through six stages from wettest to driest: slip, wet clay, leather-hard, bone dry (greenware), bisque, and glaze ware. Each stage gets a photo and a short “Use” note explaining what the potter does at that point.
My Learning Experience
Photo demonstrations were one of the ways I learned ceramics, and this page follows a pattern I know well: an image, a name, and what to do next. Going back to Harrison, he taught me all of these stages and what to do, but when I would encounter these stages during my processes, it would catch me off guard sometimes. Sometimes when the clay is leather-hard, there’s a brink of being too tough to mold but not dry enough to bisque. This would cause me to break some of my pieces as I thought it was an early enough stage of leather-hard to continue on sculpting. It also applies to when the clay is in the middle of wet and leather-hard. To navigate this, I looked at Oxford’s blog and used Tomlinson’s terms to identify where each stage lies within my pieces.
What I value most is the “Use” line under each stage because it ties how the clay looks to an action. leather-hard is where slabs are joined and foot rings are trimmed, and dry clay is where edges are sanded before bisque firing. The page also ends by saying that you earn a Clay’s limits only by practicing with it, which matches my experience when working with a piece too early or too late between the stages.
Critique Using Mayer’s Principles
The spatial contiguity principle says learners do better when related words and pictures sit close together. In the pages order, each photo sits directly above its numbered stage heading and description, so the image and its explanation are read together.
The coherence principle favours removing extraneous material. The stage section is lean: six stages, one repeated structure, no decoration. The foot of the page promotes ebooks and a shop, which falls outside the lesson but sits after it, where it doesn’t interrupt learning.
The signaling principle is handled well. Numbered headings, a bold “Use” label and the wettest to driest ordering show how the content is organized. On pre-training, key terms are defined where they first appear, such as slip, leather-hard, and bisque. Others like greenware, crazing and shivering appear with little explanation, which a true beginner may find hard.
The main limit is what a still image can show. The photos show the different types alone, without hands, scale or a cut section. A photo can’t convey the cool dampness of a leather-hard piece or the chalky lightness of bone dry, which I recognize by touch. In terms of accessibility, the images alt text on the page appear to be their file names, such as “slip-clay.jpg”, so a screen reader would offer no description.
Verdict
This is a clear first map of the six stages, well organized for beginners, and the action-focused “use” notes are its best feature. It teaches names and order, not feel, so I would pair it with hands-on time and a teacher who lets you touch clay at each stage.
https://www.oxfordclay.co.uk/blog-1/blog-post-title-four-de9r7-9yzl3
