Tom Humphries
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What is this decoration technique?

Started this discussion. Last reply by Tom Humphries May 25. 3 Replies

I've recently enjoyed doing this decoration on some spoon rests. Basically stabbing a rib into the soft clay repeatedly while the wheel is spinning.Does anyone know the name for this technique if…Continue

Leather hard to glaze fired weight difference

Started this discussion. Last reply by Norm Stuart May 25. 4 Replies

Hi all. I've made my first set of dinner plates and have just finished trimming them. I think they might be a bit heavy. I was wondering if anyone knows what percentage difference there is in weight…Continue

Once firing alumina replacement

Started this discussion. Last reply by Norm Stuart Jul 5, 2016. 11 Replies

I've recently experimented with raw glazing and once firing. My glaze was very flaky and I experienced lots of crawling. I was glazing the pots whilst bone dry and the glass has around 25% China…Continue

Firing pots with lids on

Started this discussion. Last reply by Norm Stuart Nov 4, 2015. 3 Replies

I recently did a bisque firing and had problems with cracking of my small storage jars. They didn't actually fall apart, but cracks are clearly visible.I think the problem was I tried to fire too…Continue

 

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Latest Activity

Norm Stuart replied to Tom Humphries's discussion Leather hard to glaze fired weight difference
"Interesting. That 10% loss of weight would probably be quite different with a different clay and glaze."
May 25
Tom Humphries replied to Tom Humphries's discussion What is this decoration technique?
"Good idea for garlic plate Joseph, I might try some of those sometime."
May 25
Tom Humphries replied to Tom Humphries's discussion Leather hard to glaze fired weight difference
"Fired glazed weights average at 760 grams"
May 25
Joseph Fireborn replied to Tom Humphries's discussion What is this decoration technique?
"That would make for an awesome garlic plate if your into that sort of thing. I know people pour olive oil in them and then rub garlic for bread dip. I don't do it, but I have seen plates like that. I doubt you care about this, but it is just…"
May 14
Erik Evans replied to Tom Humphries's discussion What is this decoration technique?
"Good question.  It's probably got a specific name in some other language (Korean, Chinese, or Japanese?).  Hopefully it's more elegant than "kinda-sorta soft-clay chattering" This begs the question: Does anyone know of…"
May 14
Tom Humphries posted a discussion

What is this decoration technique?

I've recently enjoyed doing this decoration on some spoon rests. Basically stabbing a rib into the soft clay repeatedly while the wheel is spinning.Does anyone know the name for this technique if there is one? I'd like to see how other people have used it on pots.Thanks,TomSee More
May 13
Tom Humphries replied to Tom Humphries's discussion Leather hard to glaze fired weight difference
"Thanks Norm that is all helpful information. Lots of variables! I decided to go with my gut feeling that they were a bit heavy. I trimmed a bit more as I had a rather chunky footring. I've recorded the weights of the four plates (average 850g)…"
Apr 22
Norm Stuart replied to Tom Humphries's discussion Leather hard to glaze fired weight difference
"Hi Tom - 100 grams of wet clay should weigh about 52 to 57 grams after it's bisqued or high-fired without a glaze. Prepared clay is usually 1/3 water by weight. You'll have to weigh a piece of wet clay, then weigh it again to learn how…"
Apr 22
Tom Humphries posted a discussion

Leather hard to glaze fired weight difference

Hi all. I've made my first set of dinner plates and have just finished trimming them. I think they might be a bit heavy. I was wondering if anyone knows what percentage difference there is in weight between leather hard and final glaze fired weight? I know there are tonnes of variables like how much it's dried, glaze thickness, clay type etc. But can anyone give a rough estimate?Thanks,TomSee More
Apr 22
Tom Humphries replied to Daniel Spruyt's discussion Can one predict the appearance of a glaze? (part I: The Si/Al ratio)
"One thing I've realised recently is the power of colourants. I made a base glaze recently that I had tailored the si/al ratio to produced my desired level of shine. Adding 5% copper oxide made a drastic difference on the gloss level."
Oct 19, 2016
Tom Humphries replied to Lawrence Weathers's discussion Slip trailing
"When I have done any wet slip work like feathering or marbling, I havent added anything to slip - just clay, water and some oxides for colour. I suppose results maybe depend on clay body a little. Are you decorating freshly thrown or leather hard…"
Oct 18, 2016
Norm Stuart replied to Tom Humphries's discussion Once firing alumina replacement
"I've always done a "screen capture" of the screen with Insight-Live, cropped and sized the image in Photoshop then uploaded the resulting JPG but I never knew why.  Now I know the much simpler "copy and paste of XML"…"
Jul 5, 2016
Norm Stuart replied to Tom Humphries's discussion Once firing alumina replacement
"Tom  - If the glaze has fine clay, especially bentonite / bentone, it will dry to a hard non-porous layer which off-gassing from greenware has to breach in some way. Either through an unglazed area, or slowly, or quickly by blowing-off the…"
Jul 5, 2016
Tom Humphries replied to Tom Humphries's discussion Once firing alumina replacement
"Copying pasting XML recipe from insight to here doesn't seem too work"
Jul 5, 2016
Tom Humphries replied to Tom Humphries's discussion Once firing alumina replacement
"I've also been working on a low clay recipe, I guess this will settle quite badly, but seems to be within target limits for cone 6 to 8. I think I'll test this too."
Jul 5, 2016
Tom Humphries replied to Tom Humphries's discussion Once firing alumina replacement
"Thanks Norm, I'm going to order some calcined kaolin and have a play with that. Some very helpful advice, I wasn't sure about the slurry properties of calcined clay, good to be aware of that. Just to pick up on one of your points, what…"
Jul 5, 2016

Profile Information

What is your experience with ceramics in general. (Long answer encouraged)
I started making pottery in 2012, since then I have learnt a lot from cone6pots, other websites, youtube and books.
What is your current involvement with electric fired ceramics? (long answer encouraged)
I am currently working from a garage studio at home. I am a full time chef and father, so pottery has to fit around that in the evenings.

I mostly make mugs, bowls and other tableware. The useful kitchen pots like storage jars, jugs and salt pigs are very appealing to me.

I make my own glazes which have been developed with help from members here, especially Norm!
All our content is viewable by the public. Why do you want to be a member, when you can already see everything as a non-member?
To be more involved and be part of the discussion
Where do you work on your ceramics projects?
home studio
Do you have your own, or participate in other ceramics Websites:
http://www.woodseats-pottery.co.uk
How did you find this network?
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At 3:36pm on June 25, 2014, Nadine Mercader said…
Tom,
By accepting friend status you can send internal messages.
Nadine
 
 
 

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Use These Links to Support Us

Members have had great things to say about John Britt's new book, Mid-Range Glazes. Click the image to buy from Amazon.com

Purchase Glazes Cone 6 by Michael Bailey, The Potters Book of Glaze Recipes by Emmanuel Cooper, or Making Marks by Robin Hopper, all available at amazon.comMastering Cone 6 Glazes by John Hesselberth & Ron Roy is now out of print.

Harbor Freight is a great place to find unbeatable prices for better HVLP spray guns with stainless steel parts and serviceable economy models, as well as detail guns, all tested by our members for spraying glazes, as well as compressors to power the guns. As yet no one has tested and commented on the remarkably inexpensive air brushes at harbor freight.

The critter siphon gun is a spray alternative that is well liked by some of our members, and is available at amazon.

Amazon is also a competitive source for photo light tents for shooting professional quality pictures of your work. They also have the EZ Cube brand favored by several of our members. You might also want to purchase the book Photographing Arts, Crafts and Collectibles . . .

If you are up to creating videos of your work or techniques you might want to invest in a flip video camera

Following are a few scales useful for potters. Your final price could be less or more - things change.

American Weigh Black Blade Digital Scale, 1000g X 0.1g $11.08 

For the non-digitally inclined the old standard Ohaus Triple Pro Mechanical Triple Beam Balance, 2610g x 0.1g, with Tare $169.00

And finally a low cost clone of the OHaus. The Adam Equipment TBB2610T Triple Beam Mechanical Balance With Tare Beam $99.62

ebay is a great alternative for many tools and the equipment used in the ceramics studio - kilns, wheels, extruders, slab rollers are often listed there both new and used.

Tips for Members

If you just want to spout off, it is best accomplished as a blog posting. If you want to get more guidance and ideas from other members, ask a question as a new discussion topic. In the upper right corner of the lists for both types of posting, you will find an "+Add " button. Clicking it will open an editor where you create your posting. 4/16/2014

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