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Clay leaves glazing techniques!


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#1 Chukchi

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Posted 16 June 2012 - 09:29 AM

Another high school art teacher here...having a time figuring out how to best show off the delicate leaf structures we are getting.
Glazes just cover them up and we are unable to find or make translucent glazes.
We'd like to somehow get one color in the leaf vien and another on the overall, kind of like water color.
Any help will be greatly appreciated!

#2 bciskepottery

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Posted 16 June 2012 - 10:55 AM

You might find some ideas on this thread . . . http://ceramicartsda...back-to-nature/

#3 Chukchi

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Posted 16 June 2012 - 11:39 AM

Making and assembling the leaves is something we have really gotten into. Our problem is creating and using color to show off the leaves. We'd like to create a a seasonal motif like fall and spring, especially for our Empty Bowls fundraiser.

#4 bciskepottery

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Posted 16 June 2012 - 03:54 PM

Using a transparent glaze -- like a Celadon -- can show vein patterns where it pools darker. If you have a clear glaze, you can add mason stain to give you some transparent colors.

DAY shows a wonderful use of underglazes for colors.

Chris suggested soaking leaves in a medium bleach/water mixture to get just the vein structure . . . take that vein structure, dip it in an iron oxide wash and impress into clay. The leaf will burn out during firing but should leave behind the iron oxide outline of the vein pattern.


You can use an iron oxide wash to highlight the leaf veins -- either brushed over the entire leaf and then wiped off the top surface with a sponge or by using a small amount of wash and letting capillary action do its thing. You can impress the leaf, bisque fire, then wax the leaf and apply glaze to the rest of the vessel -- leaving the leaf fired to natural clay color -- a nice contrast.

#5 Chris Campbell

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Posted 16 June 2012 - 04:41 PM

I would also recommend multiple firings. Work on getting the vein color first then set it with a cone 018 firing, then apply the next colors. Oxides and underglazes work well ... bonus here is you can just wash off the underglazes if you don't like it and try again .... you could low fire a clear glaze over the final result if needed..

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#6 Chukchi

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Posted 16 June 2012 - 06:20 PM

I would also recommend multiple firings. Work on getting the vein color first then set it with a cone 018 firing, then apply the next colors. Oxides and underglazes work well ... bonus here is you can just wash off the underglazes if you don't like it and try again .... you could low fire a clear glaze over the final result if needed..


Chris,
Would you fire the clay to cone 04 and the use underglazes at the suggested 018?

#7 SShirley

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Posted 16 June 2012 - 08:37 PM

What color clay are you using? You might try putting on slip or terra-sig and then lightly sanding the veins to reveal the clay color (that might be easiest when it's bisqued), then a clear glaze over that, or some kind of glaze that will show the difference between the slipped areas and the sanded to bare clay areas.

#8 Chris Campbell

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Posted 17 June 2012 - 01:15 PM

I would do your main firings as usual for your clay body and the first layer of color for the leaf veins... Use Cone 018 if you want to do multiple firings for the underglaze colors because you don't need to go any higher than that if all you want to do is make them smudge proof so you can work over them.

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#9 Chukchi

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Posted 17 June 2012 - 05:40 PM

I would do your main firings as usual for your clay body and the first layer of color for the leaf veins... Use Cone 018 if you want to do multiple firings for the underglaze colors because you don't need to go any higher than that if all you want to do is make them smudge proof so you can work over them.

Thanks! I will try that out.

#10 Chris Campbell

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Posted 17 June 2012 - 08:02 PM

Post some pix ... We would love to see the results.

Chris Campbell
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#11 Wil

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Posted 30 October 2012 - 10:47 AM

Email me


Another high school art teacher here...having a time figuring out how to best show off the delicate leaf structures we are getting.
Glazes just cover them up and we are unable to find or make translucent glazes.
We'd like to somehow get one color in the leaf vien and another on the overall, kind of like water color.
Any help will be greatly appreciated!




I am new on the forum but have had some good results with my leaf glazing which I have done in the past 10 years. I use the handle end of the brush to create the details of the leaf. Next is to take a dark glaze, and do the details with that color. After letting that dry, I use a natural sponge and with the selected glace colors, I dab my sponge in the glazes and pat them on the leaf. I do not put the glaze on too heavily so as not to cover up the detail. As you gain experience, you will know how much to put on the detail of the leaf, and how much glaze to put on the leaf itself. I hope this helps.








#12 kathi

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Posted 01 November 2012 - 12:39 PM

Another high school art teacher here...having a time figuring out how to best show off the delicate leaf structures we are getting.
Glazes just cover them up and we are unable to find or make translucent glazes.
We'd like to somehow get one color in the leaf vien and another on the overall, kind of like water color.
Any help will be greatly appreciated!



I wish I had seen this thread earlier....
I do alot of leaves. I cut leaves from my grape vines and use a rolling pin to roll them onto my slab. After cutting the shape out of the slab (leaf still attached), I score and slip the back of the leaf and my piece (usually a cup, bowl or birdhouse) and apply the leaves. I use coils for vines.
I then bisque fire. The leaf burns off, leaving the detail. I then brush on a red or black iron oxide suspension, sponge off the extra and then glaze the leaves. I am partial to Amaco Dark Green, but most translucent glazes will suffice.
The iron oxide allows the detail to be visible. Leaving the leaf in place during the firing prevents the detail from being smudged out or distorted by handling. The result is very sharp, intricate and accurate leaf detail.

#13 Nancy S.

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Posted 04 November 2012 - 06:40 PM

Back when I was in high school we relied on plain old underglaze with a clear glaze on top...we didn't fire the underglaze and then add the clear and fire again. We used the semi-moist pan underglazes in sets that resembled cheap watercolors, brushed them on with just enough water to make them flow, sponged off excess on higher areas, and let it dry before gently brushing (or sponging) on a few layers of clear. The only caveat is to be careful not to smudge the underglaze, since the wetness of the clear glaze may re-wet the dried underglaze and mess it up. I understand that's why someone suggested double-firing, but with school budgets what they are these days, I understand if that's not an option!

Good luck. :)

#14 Chukchi

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Posted 04 November 2012 - 08:15 PM

Back when I was in high school we relied on plain old underglaze with a clear glaze on top...we didn't fire the underglaze and then add the clear and fire again. We used the semi-moist pan underglazes in sets that resembled cheap watercolors, brushed them on with just enough water to make them flow, sponged off excess on higher areas, and let it dry before gently brushing (or sponging) on a few layers of clear. The only caveat is to be careful not to smudge the underglaze, since the wetness of the clear glaze may re-wet the dried underglaze and mess it up. I understand that's why someone suggested double-firing, but with school budgets what they are these days, I understand if that's not an option!

Good luck. :)



#15 Chukchi

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Posted 04 November 2012 - 08:16 PM

So were you using low fire stuff, like to cone 4? How did you make it like watercolor ?

#16 bciskepottery

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Posted 04 November 2012 - 09:26 PM

These are made using hosta leaves . . . glaze is Opulence Celadon, cone 6, electric oxidation.

#17 weeble

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Posted 05 November 2012 - 06:10 AM

I've done all sorts of fun things with pressed in leaves. Simplest is an oxide wash wiped off with a damp sponge, terra sigillata takes a bit more of a delicate touch wiping it off, but works similar. Transparent glazes are a lot of fun too. Latest batch I did terra sig with some copper carbonate in it, wiped back, then a clear over. ZING! Going to have to do some more of those!
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#18 Chukchi

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Posted 05 November 2012 - 06:49 AM

These are made using hosta leaves . . . glaze is Opulence Celadon, cone 6, electric oxidation.

Those hosta leaves are very nice!
We have used a similar glaze with good results, but still are seeking to create that watercolor effect found on fall leaves.
Transparent glazes would be ideal for my students. Does anyone know of some companies that make them?

#19 Chukchi

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Posted 05 November 2012 - 06:53 AM


Back when I was in high school we relied on plain old underglaze with a clear glaze on top...we didn't fire the underglaze and then add the clear and fire again. We used the semi-moist pan underglazes in sets that resembled cheap watercolors, brushed them on with just enough water to make them flow, sponged off excess on higher areas, and let it dry before gently brushing (or sponging) on a few layers of clear. The only caveat is to be careful not to smudge the underglaze, since the wetness of the clear glaze may re-wet the dried underglaze and mess it up. I understand that's why someone suggested double-firing, but with school budgets what they are these days, I understand if that's not an option!

Good luck. :)

What is a semi-moist pan underglaze?

#20 bciskepottery

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Posted 05 November 2012 - 07:46 PM



Back when I was in high school we relied on plain old underglaze with a clear glaze on top...we didn't fire the underglaze and then add the clear and fire again. We used the semi-moist pan underglazes in sets that resembled cheap watercolors, brushed them on with just enough water to make them flow, sponged off excess on higher areas, and let it dry before gently brushing (or sponging) on a few layers of clear. The only caveat is to be careful not to smudge the underglaze, since the wetness of the clear glaze may re-wet the dried underglaze and mess it up. I understand that's why someone suggested double-firing, but with school budgets what they are these days, I understand if that's not an option!

Good luck. Posted Image

What is a semi-moist pan underglaze?



One of many possibilities . . . http://www.amaco.com...-lead-free.html




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