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Tile that is "actually HANDMADE"
This artisan, Dennis Cuku, is the king of DIY tile, making product that he calls "actually HANDMADE". He uses a red-burding terra-cotta-like middle temperature clay body. He also makes glazes in-house and fires using 36 shapes. He mixes 129 glazes and produces about 50,000 ft.² of tile per year. Tile making presents many unique challenges, not the least of which is the need for consistency and predictability of surface character and color. This endeavour is made possible with data, a lot of it. Not just glaze recipes, but many forming, glazing and firing procedures and techniques that must be documented.
Related Pictures
Potters can learn from how glazes are fit on ceramic tile
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These are thermal expansion curves for body, engobe and glaze (from a dilatometer, a device that measures it against increasing temperature). The upper line is the body. The center line is the engobe. The lower line is the glaze. The ceramic tile industry is very conscious, not only of glaze-fit but also engobe-fit. Engobes (slips) are employed to cover brown or red burning bodies so they glaze like a porcelain. Typically technicians tune the formulation of the engobe to have an expansion between the body and glaze. The body is highest so that during cooling, as it contracts, it puts a squeeze on the engobe (the engobe thus never finds itself under tension). The glaze has the lowest expansion, it is under a state of compression by the engobe (and slightly more by the body). This equilibrium enables the tile to wear for many years without crazing or shivering. Chart courtesy of Mohamed Abdelmagid.
Making complex ceramic tile shapes by 3D printing your own cookie cutters
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This was done on an affordable RepRap printer. The red plastic templates were drawn in Fusion 360 and sliced and printed using Simplify3D. A wooden block was used to press these cookie cutters into the clay. The plastic wrap made sticking a non-issue (and rounded the corners nicely). Commercial bottled glazes were applied to this low fire talc body by brushing (in three coats) after bisque - the rounded corners make brushing easier. The tiles were fired at cone 03. This is an old classic design that I discovered when researching Damascus tile. The toughest obstacle was learning how to use Fusion 360. It turns out that cookie cutters are a starter project for many 3D software packages, there are lots of videos on making them.
A plastic pottery clay for rolling ceramic tile:
Not a crazy idea when it can do what this can!
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This is the dolomite body recipe L4410P (a development version of Plainsman Snow). It is monoporosa tile on steroids; this body has zero percent firing shrinkage at cone 04! Predicting the final size and keeping that size consistent is much easier with such bodies. I have measured its drying shrinkage as 6% (doing our standard SHAB test). The final size needed is 20.5 cm square. Thus, I calculate the cut size to be 20.5 / (100 - 0.06) = 21.8 cm (or 20.5 / 0.94 = 21.8 cm). To keep these flat, we put them between sheets of drywall; the process takes 2-3 days. Since no change in size occurs during firing, this body has another big advantage: Tiles stay flatter during firing (a major problem with tile production). While making wall tile using a plastic pottery body is not something for industry (especially because of the space requirements for drying), for artisans working on a small scale, a body made by mixing super plastic ball clay with dolomite produces amazing working and tactile properties. The bonus is that they work so well at low temperatures, where there are so many glazing options.
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