Tom Humphries
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Raw glaze recipe

Started this discussion. Last reply by Tom Anderson Mar 17. 5 Replies

Hi,I've been trying to work out a raw glaze recipe, after reading a few books suggesting ball clay works better for raw glazing leather hard pots. This glaze is intended to fire to ^8 and will be in…Continue

Unglazed Rims and Exteriors

Started this discussion. Last reply by Joseph Fireborn Jan 17. 1 Reply

Hi Folks,I just wanted to get your thoughts on this subject. I've noticed a few potters recently making mugs with unglazed rims. I'm not sure I'd like the feel of drinking from them, but it did occur…Continue

What is this decoration technique?

Started this discussion. Last reply by Tom Humphries May 25, 2017. 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, 2017. 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

 

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Latest Activity

Tom Anderson replied to Tom Humphries's discussion Raw glaze recipe
"Tom: Look at the glaze this way: a standard porcelain clay body is 50% kaolin, 25% silica! and 25% feldspar. Your glaze recipe has 32% clay content; the most I have seen prior to is 20%.  If cone 6 glazes average 50% spar, I would guesstimate…"
Mar 17
Tom Humphries replied to Tom Humphries's discussion Raw glaze recipe
"Thanks Tom, my local UK supplier only sells hp71 ball clay so I'm stuck with that for now. I guess I could reduce the quartz if alumina is too low? But I suppose that will result in Matt glaze. When your say right on border you mean only just…"
Mar 17
Tom Anderson replied to Tom Humphries's discussion Raw glaze recipe
"By the way, with that much ball clay, bentonite for suspension should not be required."
Mar 17
Tom Anderson replied to Tom Humphries's discussion Raw glaze recipe
"Tom: HP71 has 0.80% iron with 19% alumina. Old Hickory #5 has 0.88% iron! but nearly 30% alumina. Just as alumina gives glaze strength, it likewise does the same for clay. In short, #5 will make your glaze stronger and more resistant to cutlery…"
Mar 17
Tom Humphries replied to Tom Humphries's discussion Raw glaze recipe
"I have some bentonite I could add if needed after a bit of testing"
Mar 16
Tom Humphries posted a discussion

Raw glaze recipe

Hi,I've been trying to work out a raw glaze recipe, after reading a few books suggesting ball clay works better for raw glazing leather hard pots. This glaze is intended to fire to ^8 and will be in an electric kiln, although perhaps gas firing in the future. I'm planning to make up a kg or so to test. Just wondering if anything sticks out as problematic to anyone? It is withing the green and copper limits for this cone range, and expansion seems ok according to a glaze simulator I…See More
Mar 16
Joseph Fireborn replied to Tom Humphries's discussion Unglazed Rims and Exteriors
"I have many cups that are not glazed on the rim or have any glaze at all besides the ash from the wood firing. I bought all these pots on purpose. Some of them even have rougher edges(but nothing dangerous) that most would find odd to drink from. I…"
Jan 17
Tom Humphries commented on Filip Margodt's photo
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New diner plates

"Nice! Are the rims and centres painted with an underglaze or something? I would be interested to hear about your glazing process for these."
Jan 14
Tom Humphries posted a discussion

Unglazed Rims and Exteriors

Hi Folks,I just wanted to get your thoughts on this subject. I've noticed a few potters recently making mugs with unglazed rims. I'm not sure I'd like the feel of drinking from them, but it did occur to me they might be less likely to get chipped during rough handling. But perhaps it wouldn't make much difference? Clay can get chipped without any glaze on obviously...Also I've seen plates and bowls that have the inside glazed, and the rim and exterior unglazed. I made a few unfooted bowls in…See More
Jan 14

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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Comment Wall (2 comments)

You need to be a member of Electric Cone 6 & Other Ways w/ Clay to add comments!

Join Electric Cone 6 & Other Ways w/ Clay

At 8:53pm on August 11, 2017, Erik Evans said…

Oh, hell.  That's not good!  Thanks for the heads up.

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

Low cost flat lapping disc can be used on you potters wheel if you, drill bat pin holes in it, and provide a trickle of water to cool it. At amazon.com, 120 grit for aggressive material removal. Click the image to purchase 

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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