A few yellow pots

[pjkatich]

Here are a few yellow pots from last weeks firing for your viewing pleasure.

This group of pots are all made from a cone 10, porcelain clay body.

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As always, your feedback and comments are welcome.

Cheers,
Paul

[mudlarkpottery]

Paul, you have outdone yourself. They are magnificent!
For those of you who aren't potters, yellow at high temps is, perhaps, the most difficult colour to produce even if resorting to commercial stains.
Penny.

[kcpoole]

I love the 3rd one

Has a little bit more texture than the first 2 and they look "a little plain" compared to it

Ken

[GavinG]

Yellow's not easy, but it's possible that the glaze is a high-calcium matt (Derek Smith style) with a bit of iron and some bone ash. Some tweaking will get it to break on porcelain (go from yellow to red where it's thin).

Number 3 is the best shape/glaze balance for me, and no. 4 is seriously creamy. Is it difficult to get trees to live in harmony with such a strong yellow glaze?

Respect from a grumpy no-time-anymore ex-potter.

Gavin

[mudlarkpottery]

The high calcium matt glazes aren't the clear yellow that these ones are. The Derek Smith 50/50/50 will give a greenish hue and "fake" ask runnels where thick and a yellow ochre colour with medium application.

[nealweb]

G'day Paul, nice work! I like #2 for the colour and the depth i thought maybe you didn't see that many yellow pots because it seems an unusual colour and may be a challenge to match a tree with but maybe its also a challenge for the potters. Tree's can look great in this colour though, here are two examples I found, one from the net and one from here from our own Pup

[pjkatich]

Paul, you have outdone yourself. They are magnificent!
For those of you who aren't potters, yellow at high temps is, perhaps, the most difficult colour to produce even if resorting to commercial stains.
Penny.

Penny,

Thank you for the nice compliment.

Yes, I agree that yellow is a difficult color to achieve at high temperatures. However, I have found that red is even harder.

No commercial stains in these glazes, all done with oxides.

Regards,
Paul

[pjkatich]

I love the 3rd one

Has a little bit more texture than the first 2 and they look "a little plain" compared to it

Ken

Thanks Ken, I appreciate the feedback.

Cheers,
Paul

[pjkatich]

Yellow's not easy, but it's possible that the glaze is a high-calcium matt (Derek Smith style) with a bit of iron and some bone ash. Some tweaking will get it to break on porcelain (go from yellow to red where it's thin).

Number 3 is the best shape/glaze balance for me, and no. 4 is seriously creamy. Is it difficult to get trees to live in harmony with such a strong yellow glaze?

Respect from a grumpy no-time-anymore ex-potter.

Gavin

G'Day Gavin,

Thanks for taking the time to comment on the pots.

These pots represent three different glazes, none of which I would consider a high-calcium matt. Two of the glazes are barium based and use red iron oxide to produce the yellow. The third glaze, (the very pale yellow) incorporates a lanthanide rare earth oxide called Praseodymium to get the yellow color.

I appreciate the feedback.

Cheers,
Paul

[pjkatich]

G'day Paul, nice work! I like #2 for the colour and the depth i thought maybe you didn't see that many yellow pots because it seems an unusual colour and may be a challenge to match a tree with but maybe its also a challenge for the potters. Tree's can look great in this colour though, here are two examples I found, one from the net and one from here from our own Pup

G'day to you Neal,

I appreciate you taking the time to comment and thank you for adding the photos. They help to show very clearly that yellow pots can be matched up with a good bonsai tree.

I look forward to seeing one of your trees in your yellow pots.

Have a great day.

Regards,
Paul

[GavinG]

Penny, the bone ash addition gave the clear yellow in the glazes I was using. Agree with the muddy colour of iron on it's own.

Paul, interesting use of barium. Praseodymium sounds like something the copywriters dream up to combat The Seven Visible Signs Of Aging! But you've made a subtle and refined glaze from it.

Gavin

[mudlarkpottery]

Hey Paul, I found that Praseodymium burns out in reduction. Do you have the same problem with it? Your yellow pots look like an oxidized firing by the clay colour. I'm not hinting for recipes - just an observation.
There are some high-fire commercial stains out now which give a reliable fire-engine red and cherry red but i prefer to use the oxides. I love the copper reds.
Penny.

[pjkatich]

Paul, interesting use of barium. Praseodymium sounds like something the copywriters dream up to combat The Seven Visible Signs Of Aging! But you've made a subtle and refined glaze from it. Gavin

Gavin,

I agree, the word Praseodymium sounds so exotic, like something out of a Science Fiction movie.

I appreciate the compliment.

Cheers,
Paul

[pjkatich]

Hey Paul, I found that Praseodymium burns out in reduction. Do you have the same problem with it? Your yellow pots look like an oxidized firing by the clay colour. I'm not hinting for recipes - just an observation.
There are some high-fire commercial stains out now which give a reliable fire-engine red and cherry red but i prefer to use the oxides. I love the copper reds.

Hey Penny,

All these pots were fired in reduction and yes, I do experience some volatility with the Praseodymium.

However, it is my understanding that it is not the reduction that causes it to burn out it is the temperature. My reference material indicates that the Praseodymium becomes volatile above 2300 Degrees F. Firing to cone 10 (2345 Degrees F.) does burn a bit of the oxide away. That is why this glaze produces a very pale yellow.

I also like a good copper red glaze. Unfortunately, I have not had much luck producing a consistently good one. Nonetheless, I continue to try. One day I will hit upon the right formula for the way I fire.

Thanks for your input.

Cheers,
Paul

[pjkatich]

Here are a couple more yellow pots for you to look at.

These two are made from a brown stoneware clay body.

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The clay body makes a big difference in the appearance of the glaze.

Enjoy,
Paul