Showing posts with label materials. Show all posts
Showing posts with label materials. Show all posts

Thursday, 20 June 2013

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...

Wednesday, 19 June 2013

Ceramic 3D printing tests 06 - and more...

19.06.13

My penultimate day here at KHIO in Oslo and a morning of ups and downs. I mentioned yesterday that we were asked to use a kiln with extraction that has the benefit of being able to control the cooling cycle.

As you can see, the new test cubes, with thicker walls, have suffered in the firing. one has broken in two, one has cracked and the third is OK.









 

The larger version of my architectural piece has also suffered. It has deformed due to the weight of the upper part and the shell has come away from the core. There are a number of possible causes:
  1. The speed of firing was too fast.
  2. The speed of cooling was too fast.
  3. The structure of the piece was not strong enough.
  4. The binder settings were wrong. 
  5. The ceramic powder formulation.
My feeling is that the cause was primarily either 1 or 2. Previous firings have been successful and the deformation of the pieces has happened in the printer, not in the kiln. 
The structure could be stronger to support the upper part.

We obviously need to conduct more tests, especially as the red earthenware seems to behave itself very well.

I have just found out that the Potclays powder will withstand 1300°C, so I plan to take some of the tests back to Manchester with me and try a selection of high temperature glazes.



So far today, the good news has been my Prtlnd Vase. It appears to have come through the printing unscathed, I'm very pleased with the detail of the surface decoration. There's litle loss of definition. The photograph shows the piece just after it was cleaned up in the depowdering unit, but it is still full of powder at this point. At this moment in time it is sat in a warm kiln, my next job, when I have finished writing this, is to remove the powder from the interior and put it back into the kiln on a warming cycle. And then programme the kiln to start firing at about 10pm this evening.
If it goes well, I will be able to take it home with me to decorate and glaze fire.






Here's what the Prtlnd Vase looked like on the Zprint software.

Before packing up for the day I glazed a selection of tests with the clear glaze and set them to fire overnight.

Tomorrow afternoon's kiln opening will be very interesting, hopefully there will be some posiitve results.

Friday, 14 June 2013

Ceramic 3D printing tests 02 - Why?

14.06.13

note the deformation.
The printing of the Potclays powder was a repeat of the red clay tests. 1:1:2, 1:1:3 and 1:1:4 mixtures were all successfully printed. 
It's important to leave the prints in the printer for 2 hours at the very least before removing them. Even after 2 hours some were a little soft and started to bend. Better to leave prints overnight, particularly if more complex parts are being printed.



All the test bars were left to dry on top of a warm kiln overnight and this morning the excess powder was removed in the depowdering unit and the 950°C firing started.
The kiln was still around 100°C from a previous firing, but I decided to take it up slowly - 7 hours to 600°C, then 2 hours to 950°C with a 30 minute soak.

Even though we are awaiting the results of the firings, it seems a good opportunity to print a more complex form. My instinct tells me that that the 1:1:2 mixture will shrink a great deal and probably be the weakest, so I'm inclined to try the 1:1:3 powder. We will see... 







test cube
60mm test cube
First of all I quickly created a cube with a sphere removed from the interior. This gives us a simple shape, probably impossible to slipcast that has a surface that just about covers every angle. So it makes a good glaze test, as well as testing the rigidity of the ceramic powder.

I actually set 3 versions printing, one as designed, the other two scaled one dimensionally to allow for possible deformation in the drying and firing.


  




test cubes
80, 70, 60 mm test cubes
It's important to remember that this is not simply a technical exercise. If successful, there may be all sorts of potential uses for ceramic 3D printing, certainly medical being one of them. But that is not my prime motivation. Rather selfishly I suppose, I hope to be able to print my artworks in ceramics thereby combining my previous experience as a maker of slip-decorated earthenware, my understanding of the 3-dimensional form and my interest in the act of making with this new, so-called post-industrial technology. So it's all about research, not technical research, though that can't be avoided, but research that engages with our fundamental relationship with objects and the making of them.
I feel it is timely to look at this area, not just because we have new tools, but because our increasing reliance on 2-dimensional screens to engage with the physical world has the potential to detach us from the sensory experience and feedback we receive when we take the trouble to venture outdoors, smell those flowers in the garden, pick up that smooth stone or spot the woodpecker calling from a tree. You probably think I'm just being romantic, after all I'm one of the generation that bridges the digital divide, but when I hear about the exciting advances in augmented reality, where it will be possible to surround ourselves with virtual objects, rather than actual, physical stuff then surely it's time to question the very nature of our relationship with objects.
WIll we need to buy another pot or painting to decorate our homes when we will be able to simply download a holographic Ming vase?

Anyhow, I'll just leave that hanging in the air...


Tuesday, 28 May 2013

Where do I go from here?

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April and May have been busy, a pretty hectic combination of work and play. 

It started with a trip to Oslo National Academy of the Arts, where I was invited to give a lecture about my practice. It was also an opportunity to meet the staff in both the Ceramics department and in the 3D printing facility. The facilities are extremely impressive, all housed in a beautiful 19th century sail factory complex.
I am planning to return for a longer period in order to experiment with their ZCorp 310 that they have just started to use with ceramic powders. The plan is to create a network of 3D printer practitioners exploring the theme of ceramics, culminating in an event in the autumn of 2014.

A few days after my return to the UK, I set off for a holiday in France with my wife Vicky, our friend Jan and my bike. The trip by train to Montelimar was excellent, though carrying my road bike in a bag wasn't that easy. Whilst there I cycled from the Drôme, through the Gorge de L'Ardeche, down into Languedoc to see friends, then up through the Cevennes to be reunited with Vicky and Jan in Ispagnac, a beautiful village at the entrance to the Gorge du Tarn.

I had to cut the holiday short in order to return to London for Collect, held again at the Saatchi Gallery, where I was showing some new pieces with Adrian Sassoon. The show was definitely up to it's usual standard, and I was lucky to have the Prtlnd Vase purchased by the Art Fund for the New Walk Gallery in Leicester. The curators plan to open a digital gallery and had researched my work and in particular the Prtlnd Vase for their presentation to the Art Fund.
Whilst at Collect, I took part in the first ‘Fielding Talk: Lives in Craft, launched in memory of Amanda Fielding, the writer and curator who died in 2012. This event, …celebrates Fielding’s passion and knowledge for the sector through the voices and experiences of the most exciting and innovative makers in contemporary craft.’ Glenn Adamson from the V&A chaired it with Clare Twomey and myself in discussion around the theme of the relationship between makers and curators. The acquisition and positioning of ‘digital craft’ has been problematic for curators as there was uncertainty as to the placing of the work. Fortunately for my contemporaries and I, there now appears to be a confidence and keen interest in our work, though the interpretation of challenging pieces can still be problematic for the curators.


Back in Manchester, I have been continuing to explore the Mcor Matrix 300 printer that 'prints' in layers of paper. It has been a temperamental machine, but a technician’s recent visit appears to have made it operate more smoothly. I set it off this morning to print the first of 4 pieces to be used as moulds for the making of ceramic sprigs for a version of the Prtlnd Vase. The body of the vase was printed in 4 sections by Mcor, as our machine failed to build them. I plan to have a mould produced and if talks with Wedgwood succeed, I will slipcast it in traditional Jasperware.

-->
And this leads to the question I pose in the title of this piece, “Where do I go from here?’ The reason I ask this question is that I am going through a period of reflection about my work. Over the past 7 years I have produced a body of work that has investigated 3D printing through the interpretation and re-design of familiar objects such as Wedgwood and Sèvres ceramics, appropriating their cultural significance to make comments about craft, values and the virtual world that we increasingly inhabit.
As I have always said, I don’t want to use the technology for its own sake, there has to be an idea that underpins its use. I am now at the stage where I feel I need to go further, in terms of material and process. The aim has been and still is to produce ceramic 3D printed artworks, combining my previous experience and knowledge of ceramics history with ‘post-industrial’ manufacturing. But this is where Glenn Adamson steps in.
-->In his new book, ‘The Invention of Craft’ he states that “…new forms of practice will inevitably be forged through the synthesis of the analogue and the digital…”[1]
The Mcor Matrix printer alerted me to the journey the data travels between the computer software and the printed artwork. The only difference between the data used to produce the paper prints of the Prtlnd vase and the SLS version, is scale. However, unlike the SLS original the faceted sides look as though they have been made from folded paper. Something has happened in the process that gives the object a softer, ‘crafted’ look. So this version will not only refer to the relationship between actual and the virtual from the standpoint of our increasing engagement of the real world through a screen, but also record the material process.
The other thought-provoking piece of writing comes from Justin McGuirk in the Collect 2013 catalogue. He is talking about craft ‘fetishism’ and the difference between being seduced by electronic gizmos and crafted objects. “The philosopher Bruno Latour might argue that we are once again seduced by the ‘thingness’ of things. In his essay ‘Why has critique run out of steam’ he extrapolates Martin Heidegger’s distinction between objects and things. He writes ‘The hand-made jug can be a thing, while the industrially made can of Coke remains an object. While the latter is abandoned to the empty mastery of science and technology, only the former, cradled in the respected idiom of art, craftsmanship and poetry, could deploy its rich set of connotations.’ So we have a distinction here between the mute machine-made object and the poetic hand-made thing. Does this distinction help us?”[2]
And where does it place my work?
Do I fall between the 2 stools? And is this why I feel I need to bring a physical, tactile connection back into my work?
I shouldn’t care what the Adamsons and McGuirks think, as I am a maker not a critical historian, writer or philosopher, but even before my days at the RCA I have attempted to justify my output. It’s part of my methodology and one that sometimes weighs heavy.



[1] Glenn Adamson, The Invention of Craft (London: Bloomsbury, 2013) p.166
[2] Justin McGuirk, Fashion, Fetish and Craft, (Crafts Council 2013) pp.19, 20

Thursday, 3 February 2011

yet more actual and virtual.....

These last few months have been both exciting and frustrating in equal measure. I have been continuing my investigations of the actual/virtual theme in my work with the design of a new piece, or pair of pieces called Amalthea. They are complex cornucopia like pieces, one filigree, its companion a solid version with raised surface decoration.



To begin with, I generated a type of QR code known as a ‘blotcode’ which links to a page on my website when scanned by a barcode reader, available as an App for some smart phones. I then extruded the 2-dimensional image into a 3-dimensional form using Rhino 3D software. The cornucopia shape of Amalthea refers to the wealth of knowledge available on the World Wide Web whilst the cryptic symbols within the filigree refer to the consequences this may have on society.
Objects often have stories attached to them. They can commemorate an event; they are often transformed into family heirlooms and passed on with the stories associated with them. Amalthea also tell stories, but these stories are online, so have the potential to include text, video, image and music. They can be added to over time, creating a repository of memories and information.
So when the viewer scans Amalthea with a barcode reader mobile phone App, it connects to a page on my website telling the story, providing additional information thereby creating a simultaneous actual and virtual experience.
I plan to offer a series of similar pieces where the QR code is generated for a client linking the piece to information specific to that person. So, as heirlooms, the virtual experience could tell the story of the journey of that object through the generations.

In the making of Amalthea I have become increasingly aware of the complexities of Additive Manufacturing and selective laser sintering (SLS) in particular. The machines are complex, with a myriad of controls that the operator/technician must become as attuned to as any craftsman does to their tools. It's certainly not a case of 'pressing a button' as some people think. And though I am not the highly skilled person operating the machine I need to have both a reasonable understanding of the technology and a good working relationship with the operator.

When my work was produced in France, it was made on a ZCorp 3D printing machine. This is far simpler than the SLS technology as it employs a liquid binder rather than a laser to build the layers. And it's one of these machines that we are going to use in an attempt to print objects in clay. This is the dream that I have had since I first heard of Rapid Prototyping quite a few years ago. Our project at the Bartlett School of Architecture in London will build on the excelent work of Mark Ganter and his team at the Solheim Laboratory at the University of Washington in Seattle. We are also grateful to Ronald Rael and the ceramics laboratory at the University of California, Berkeley for providing us with a detailed technical report of his team's thorough testing of ceramic materials.
The Open Source philosophy of this research is fundamental; thanks to the generosity of Mark Ganter there is a growing community of like-minded groups all ploughing the same furrow. By bouncing ideas of each other the momentum is increased and reliable materials will be available for the many, rather than the few.

Though printing the Amalthea in clay is probably a little way off, I am very excited by the prospect of being able to bring both my experience and knowledge of ceramics together with the emerging technology of the 2!st century.

Saturday, 9 May 2009

The iPotter

We have the technology...
I have evolved from making ceramics with almost pre-Industrial Revolution materials and technology to manufacturing them using technology from the next Industrial Revolution. In doing so my practice has virtually leapt 250 years.

...and the materials
The majority of my friends from the Studio Pottery world are baffled. My work no longer shares one of the prime motivations of handmade ceramics- the expression of material qualities and processes.
The process I now use prevents me from capturing a moment in time in the same way as I could with liquid coloured slips, but my approach to the design and digital manufacture of pieces like The Wedgwoodn't Tureen doesn't divorce me from the need to engage with material qualities.
So if I loose something that was an important ingredient, what do I gain? Freedom.
I am liberated from some of the restrictions of material properties; I don't have to think about the centrifugal forces that impose their effects on the form of a thrown pot; gravity has no influence.
Most importantly I am freed from the 'baggage' associated with Studio Pottery, whose genesis was the Arts and Craft Movement and its rejection of the dehumanising effects of industrial production and the division of labour.
In fact, the process I employ now has the potential to turn the circle back to the pre-Industrial Revolution days of direct contact between the maker and the customer. 3D printing or Additive Manufacturing (AM) or whatever you wish to call it, is not restricted by the need for moulds or tooling. A design can be customised for customer before it is manufactured.

A blacksmith gains the skills required to choose the right metal for the job through direct experience (tacit knowledge). Materials need to be appropriate to the task asked of them and as AM is primarily a material based technology, with new materials and variations coming onto the market on a regular basis, then those engaged with them surely require the same skills as the blacksmith.

As part of my RCA project I used The Wedgwoodn't Tureen to test the capabilities of the software, hardware and materials of AM and particularly the materials and processes developed by Axiatec. Now that I have acquired a basic understanding, I can go on to exploit the freedom that they give me. Through the design and production of new work I continue my testing and expand my tacit knowledge in the process.
Having divorced myself from the Studio Pottery movement, the approach to my work is bound to be framed by 25 years of making pots, but my new work has been able to take on a more conceptual direction, engaging with ideas that I hope the viewer will find thought-provoking.

(to be continued.....)

Sunday, 27 January 2008

26.01.08

This week has been a rollercoaster- with some good progress made at College in both areas of writing and making.
My Tuesday morning train journey was spent designing some glass pieces that could be produced using rapid prototyped moulds. The moulds need to infiltrated and cured and then will withstand considerable heat. They can also be used for low temperature metal casting. When I was previously at the company in Paris, I saw a mould that had been used to cast aluminium. The surface didn’t appear to have been affected at all by the hot metal.
On Wednesday I went over to Paris to collect the Wedgwoodnt Tureen that had been made in black for me. It is to have a black ceramic coating made to look like Wedgwood black jasper. Unfortunately when I arrived Gilles was rushing between labs trying to prepare the right mixture for the coating. As the afternoon continued it was clear that he was struggling and I came home empty handed in the evening. The black tureen looked excellent, it appears more ‘see through’ than the white version. On Thursday I heard that the Wedgwoodn’t Project has been shortlisted for the RSA Ceramic Futures competition. The interview is on March 11th and there’s some preparation work to do beforehand.
I then had a tutorial with Martin, primarily to discuss the ‘Context’ section of the thesis. He raised a few points that I need to address, but fundamentally he was happy with it. I now have to start tackling the ‘Making’ section, once I’ve gone through the whole ‘Sensing’ section to see how its three parts read as a whole.
Through the week I had been casting and firing the kiln, on Thursday I added some manganese dioxide to the Potclays glaze in an attempt to make it more metallic. The results came out on Friday and they are the most successful yet. The cone form looked very interesting with red or white light inside it, creating a volume of floating light in the central space.
Friday afternoon was spent at the V&A having a look around Collect. I felt overwhelmed by so many beautiful objects, but underwhelmed by a lack of content in quite a lot of the work. As Chris Lefteri says in his introduction to ‘Ingredients’ “…the importance of an object and its physical manifestation has diminished… new technologies have provided consumers with a new level of engagement with the object.”[1] I was looking for story telling in the objects, something that I could emotionally engage with, and something beyond the well crafted.
I returned to the V&A later for their Friday Late, an evening of themed ‘craft’ related activities, some of which were participatory. There was Ballroom dancing on a beautifully stencilled, icing sugar dance floor, casting your finger or toe in chocolate, a graphic design ‘playgroup’ and some interesting time-lapse films. I managed to be roped into a Charlie Chaplin impersonators Victoria sponge production line, having to dress in bowler hat, false moustache, walking cane, apron and latex gloves! It was a bit of fun and I was given a piece cake as a thank-you.
Saturday morning was spent in College, continuing to develop the glass mould design, and then it was an afternoon spent on the slow train home to Cumbria, writing up this entry.

[1] Ingredients, a Materials project by Chris Lefteri. No. 2 Sept 2007 www.moreingredients.com