Experimenting with sodium silicate textures and bronze glaze

Over winter I've been testing out the sodium silicate technique, which yields a typical cracked looking textural surface. It's fun to play around with. I've ended up with an absolute stash of bowl forms- loosely inspired by ceramics from the Iron Age- Belgic period, after visiting various collections in Essex and Suffolk museums.

I'm still figuring out exactly how to finish these pieces glaze wise- I've opted for a rough texture on these ones with a manganese wash over porcelain slip applied at the making stage. Interiors are poured over with a thin coating of Stephen Murfitt's bronze glaze recipe. I've used a blue turquoise glaze to highlight the rims. Do they work ? I guess they're the best yet and I managed to sell all three of these to a collector from Hastings- which is a nice start for this range. So yes - another nice change to Raku- and we'll see how it progresses with time.

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Making and firing Raku tiles

I have just had in one or two orders and enquiries concerning Raku tiles. Making them can drive you to despair- what with their tendancy to warp, crack and shrink! It's amazing how something so simple is in actual fact so hard to make. It's also very difficult to lift a flat object out of the kiln with tongs from a red hot kiln. Well, with some prior experience, I've developed a firing system for tiles now which is now working pretty well. Quite simply, I lay each tile on a flat bed of ceramic fibre. That way each tile is raised slightly off the kiln shelf- and it's then easy to grasp the tile with tongs and drop into your reduction chamber/smoking bin. I stack two or three kiln shelves and can pack in about 20 tiles in one batch - depending on size. I do let the kiln cool slightly before carefully removing each shelf of tiles. I back off the gas- get each shelf of tiles out- then power back up to temperature and repeat till they're all safely ...

Early days with volcanic and crater glaze part 2....

I glazed a couple of volcanic/crater glaze tapered bowls recently. They almost "half" work- but I'm still not convinced I've got it right- although it's promising. I layered combinations of glaze but I'm having a slight problem with the thick layers of silicon carbide glaze crawling. Sticky fingers maybe? Lots more to come over the next few months, probably with the next recipe- Pinnel Strontium Crater - with a variety of glaze stain additions . It's a pretty reliable recipe so fingers crossed.

Some more Crater glaze test results

I've been blathering on about Crater and Lava Glaze recipes here and on Facebook too. I suddenly "got the bug" as well as a commission- (more on this later) so hence the rather manic activity testing out glazes and destroying kiln shelves in the process with runny, bubbling glazes. I tested 2 recipes- after first trying the usual recipes from the internet and in various books. As I suspected - few of them gave satisfactory results- either it was "pilot error" or the glaze authors just happen to neglect to tell you that vital missing ingredient, kiln temperature or soak time etc! (Know the type of thing?) Anyway I resorted to testing 2 standard glaze recipes which I've had for years. A turquoise matte and a Lucy Rie white stoneware. The jury is still out on the turquoise variant- but the white is rather nice. A little suggestion from Potter Jan Lewin Cadogan http://www.janlewin-cadogancontemporaryceramics.co.uk/ put me right by suggesting to mix the g...

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