|Monthly Tech-Tip |
This cookie cutter can both cut and stamp the piece (notice the 3D render in the centre, the logo is 2mm lower than that cutter around the outside). We make them by rolling a slab to 3.2mm (1/8in) thick, applying stretch wrap over it and then pressing the cutter/stamper into it (using a wood block). Then just peel away the plastic and the outer waste clay and a perfect crest is left. This method enables using clay of almost any stiffness. We find that softer clay works best, just peel it up from the board, apply slip to the back, position it on the side of the leather hard ware and press it down (from the centre outwards). On the lower right is a crested mug that has just been glazed. Upper right is a crest that has been glazed and fired. About the cookie cutter: We create them with 0.8mm wall thickness (twice the width of the 0.4mm extruder on the 3D printer). We export the vector image (made in Illustrator) into Fusion 360 and then add elements to stabilize and hold the profile in place. This cutter is 8mm tall and the stamp lines are 5mm tall. The crest is 52mm (2 in) wide. This whole process may sound a little intimidating to you - but we are working on a step-by-step video.
This is made from 100% of a natural clay (3B) from the Whitemud formation in Ravenscrag, Saskatchewan. To make this body, which I call MNP, I slake and slurry up the raw clay lumps, sieve it to 200 mesh and then dewater on a plaster table. I rolled the plastic clay into a thin layer, cut it into a cross-shape using a 3D printed cookie-cutter, 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).
Cookie Cutting clay with 3D printed cutters
We are finding more and more applications for this simple process of cookie-cutting shapes in ceramics. You won't believe whats possible and how easy it is to get started.
3D Printing a Clay Cookie Cutter-Stamper
Create a clay cookie cutter by exporting a vector image from Illustrator into Fusion 360, adding width to lines and extruding them to form the cutter, stamp and base