2019 Jiggering-Casting Project | Comparing the Melt Fluidity of 16 Frits | Pie Crust Mug Project | Slurry Mixing and Dewatering Your Own Clay Body | Testing a New Load of EP Kaolin

Pie Crust Mug Project

Here is how I make my folded hand-built mugs.
Ths method has a number of advantages.
It lends itself to automation.
It uses very little clay.

Related Information

3D design for shell mold for cup model

This was created by a simple revolve operation and then shelling the shape (from the top) to 0.9mm thickness.

3D design of cookie-cutter quarter

Four of these were 3D printed and then combined to make the cutter.

Making a pie-crust mug - The cookie cutter

Original File: 7F77776A-CD54-4D02-9055-D69C98757E58.jpeg

Black engobed M340 stoneware with GA6-B Alberta Slip glaze

Hand built. Cone 6 drop-and-hold PLC6DS firing. The engobe is the L3954B base recipe with added Mason 6600 black stain, it was applied at the leather hard stage inside and part way down the outside. The GA6-B glaze enhances the black under it. By Tony Hansen.

Yellow Sunshine Mug by Tony Hansen

Fired at cone 6. Hand-rolled and assembled using Plainsman Polar Ice. I think studies would show that drinking coffee from a yellow mug in the morning will brighten up your whole day!

Incredible Mother Nature’s porcelain

A hand-built mug made from 100% of a naturally occurring porcelain

This is made from 100% of a natural clay (3B) from the Whitemud formation in Ravenscrag, Saskatchewan. I rolled the plastic clay into a thin layer, cut it into a cross-shape, drape-molded it over a plaster form and then slip-joined the seams. It fires very dense and strong (to zero porosity like glass!). It holds together well and joins well with its own slip. Although not super plastic, it is smooth and fine-grained like a commercial porcelain body. I add 1-2% bentonite to make it more plastic when needed. It has the ability to be rolled extremely thin and yet does not warp in the firing! This mug has a weight-to-volume ratio of 2.08 (the weight of water it will hold compared to its own weight).

Example of parametrically-drawn model

A 3D printed cookie cutter showing parametric measurements, four of these are glued together

I glue four of these together to create a cookie cutter for producing my slab-built mugs. For different sizes of mugs I need cutters with different geometries. This is quarter-cutter and it has been drawn "parametrically" (using Fusion 360). That means that certain aspects of its geometry (two lengths and one angle) can be changed by simply changing the parameters (in the Parameters dialog). The drawing then adjusts automatically, it is magic! Other aspects are fixed (e.g. the right-angle, the pucker-preventing hole cutouts, the height, thickness). Parametric design is revolutionary, it fits my try-it-adjust-it-try-it-again way of working. I can label my printed parts according to the parameters, in this case 45-25-108.

By Tony Hansen

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