Taipa Lab NotesOpen material research from Park Royal, London.https://www.taipalab.com/en-gbClay from London construction sites: a working guidehttps://www.taipalab.com/notes/clay-from-london-construction-sites/https://www.taipalab.com/notes/clay-from-london-construction-sites/London ground is full of clay, and building sites dig huge amounts of it. This is a plain guide to what that clay is, where it goes now, whether it is any good for ceramics, and what we found firing one batch of it.Sun, 07 Jun 2026 00:00:00 GMTfrom-the-studioclaylondonwastedeveloperspark-royalIs London clay any good for pottery?https://www.taipalab.com/notes/is-london-clay-any-good-for-pottery/https://www.taipalab.com/notes/is-london-clay-any-good-for-pottery/A short honest answer, grounded in one wild clay dug from a Park Royal building site. For that clay, in these tests, yes for some uses, with caveats.Sun, 07 Jun 2026 00:00:00 GMTearth-and-fireclayfiringwater-absorptionlondonexplainerWhat happens to clay dug from a London building sitehttps://www.taipalab.com/notes/what-happens-to-clay-dug-from-a-london-building-site/https://www.taipalab.com/notes/what-happens-to-clay-dug-from-a-london-building-site/A plain FAQ for developers and landowners on what excavated London clay costs to move, when it can be reused, and whether it is good for anything.Sun, 07 Jun 2026 00:00:00 GMTfrom-the-studiowastedeveloperslondonclayexplainerIf you dig clay out of a London site, here is what could happen to it next.https://www.taipalab.com/notes/clay-out-of-a-london-site/https://www.taipalab.com/notes/clay-out-of-a-london-site/Excavated London clay is usually treated as something to move on. Here is what a small material practice would test it for, and what working together actually involves.Fri, 05 Jun 2026 00:00:00 GMTfrom-the-studiowastedeveloperslondonclayHow a clay matures, and why hotter is not better.https://www.taipalab.com/notes/how-a-clay-matures/https://www.taipalab.com/notes/how-a-clay-matures/A plain guide to what maturing means for a clay, why there is a best firing temperature, and what happens past it. Grounded in the Park Royal numbers.Tue, 02 Jun 2026 00:00:00 GMTearth-and-firefiringwater-absorptionclayexplainerAdding 2.5% barium carbonate made Park Royal clay cast.https://www.taipalab.com/notes/barium-carbonate-made-park-royal-clay-cast/https://www.taipalab.com/notes/barium-carbonate-made-park-royal-clay-cast/Dug Park Royal clay would not slip-cast. Every sodium deflocculant failed or gelled it. 2.5% barium carbonate made it castable.Wed, 27 May 2026 00:00:00 GMTfrom-the-benchbarium-carbonateslip-castingclaypark-royalThe Park Royal clay firing story, batch by batch.https://www.taipalab.com/notes/park-royal-clay-firing-story/https://www.taipalab.com/notes/park-royal-clay-firing-story/Clay dug from a Park Royal building site, fired from 700 to 1150 C in six batches. Absorption bottoms out near 1050 C, then the clay over-fires.Wed, 20 May 2026 00:00:00 GMTfrom-the-benchfiringwater-absorptionclaypark-royal