Ceramic 3D printing tests 07 - some results

Well, it's my last day here at KHIO, for now. I will be returning in Novemeber to speak at the Norwegian Crafts Annual Meeting and hope to spend a few days here at KHIO to conduct some more tests. But by then I should have the ZCorp 406 running back in Manchester and have made some tests of my own.

I plan to continue the postings, and would appreciate any thoughts, reactions or assistance from like-minded explorers.

Results of the test bar firings: 

POWDER TYPE

RATIO *

LENGTH mm **

SHRINKAGE

950°C
Red Clay***	1:1:2	Turned to 'foam'
	1:1:3	90	10%
	1:1:4	91	9%
Potclays****	1:1:2	± 84	16%
	1:1:3	86	14%
	1:1:4	89	11%
1000°C
Red Clay	1:1:2	Turned to 'foam'
	1:1:3	90	10%
	1:1:4	91	9%
Potclays	1:1:2	± 84	16%
	1:1:3	86	14%
	1:1:4	88	12%
1050°C
Red Clay	1:1:2	Turned to 'foam'
	1:1:3	These tests were dipped in vitreous slip, fired to 1000°C, then glazed and fired to 1085°C
	1:1:4
Potclays	1:1:2
	1:1:3
	1:1:4
11000°C
Red Clay	1:1:2	Turned to 'foam'
	1:1:3	88	12%
	1:1:4	90	10%
Potclays	1:1:2	± 82	18%
	1:1:3	83	17%
	1:1:4	85	15%
1085°C GLAZE
Red Clay	1:1:2	N/A
	1:1:3	89	11%
	1:1:4	91	9%
Potclays	1:1:2	83	17%
	1:1:3	85	15%
	1:1:4	86	14%

* REFERS TO MIX OF SUGAR, MALTODEXTRIN AND CERAMIC POWDER, i.e 1:1:4 =1 part sugar, 1 part maltodextrin, 4 parts ceramic powder.

** Refers to the recessed 100mm line in the test bars measured after firing.

*** Pure red clay supplied by KHIO

**** Potclays ceramic powder mix, contains flux, supplied by Michael Eden (MIRIAD)


The Prtlnd Vase is still in the kiln, hopefully I will be able to unpack it before I leave here this evening... I'll let you know.
A second vase was printed yesterday and is still in the powder...