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URL: Plainsman Clays Website - This is authored by Digitalfire and is a reference website in its own right. It provides unparalleled documentation of clays and recipes and processes used by the potter customers.
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John Porter visiting Plainsman Clays in 2023
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John took us kids under his wing way back in the early 1970s and we have all been here ever since, working together since he left in the late 70s. Left to right: Joe Schmidt, my lab co-worker; Tim Lerner, our purchasing agent; Kirk Miller, production foreman; John Porter and me, Tony Hansen.
Mel Noble at Plainsman Clay's Ravenscrag, Saskatchewan quarry
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Plainsman Clays extracts 6 different sedimentary clays from this quarry (Mel knows where the layers separate). The dried test bars on the right show them (top to bottom). The range of properties exhibited is astounding. The top-most layer, A1, is the most plastic and has the most iron concretion particles (used in our most speckled reduction bodies). The bottom one, 3D, is the least plastic and most silty (the base for Ravenscrag Slip), it is also the cleanest and most vitreous. The middle two, A3 and 3B, are complete buff stonewares (e.g. M340 and H550). A2, the second one down, is a ball clay (similar to commercial products), it is refractory and the base for Plainsman Fireclay. The second from the bottom, 3C. fires the whitest and is the most refractory (it is the base for H441G).
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