Refining Plaster Prototype

Altering turned shape made on the plaster lethe; trying multitude of tools.


20161202_171040
As my intention to create 4 different feet as a base for the cup, inspired by the 4 legs of the Penguin Donkey couldn’t be realised through the lathe turning stage, I had to work onto the turned form further, and carve the feet away.

Drawing a technical sketch of the base in my sketchbook, and carefully calculating the legs’ positions, I could place my turned form onto it to accurately mark the legs’ positions.

I started carving away bigger chunks with range of small hoop or cutting tools. However, that proved too brutal and I was scared I would accidentally damage the prototype.
Therefore, I went to small metals workshop and used Dremel tool to precisely carve the feet away with much more control in my hands.

This proved as a great, precise and fast way to alter a prototype. Using multitude of attachments and different speed settings I could carve away bigger chunks, take small quantity of plaster closer to the feet and get into the more awkward angles, 20161203_125357as well as smooth the surface level.

To smooth all the edges precisely, I had to switch to using wet-and-dry sand paper of various grades, to safely file away the small quantities of plaster.


I again rather enjoyed doing small, precise and planned manual alteration of form.

However, I’m not entirely happy with the prototype. I feel the legs and bottom curve should be even more pronounced, to better represent the original Penguin Donkey and its long feet and profound curves. I’m afraid the shrinkage of the clay after glaze firing will make the features rather insignificant.

At the end, it is only a test piece to challenge my skills further. I hope I’ll be able to
produce even better and more prototypes with more confidence20161203_131240.

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Published by

Marek Liska

https://ceramicliska.wordpress.com/

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