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kheicksen

Glazing over clear?

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I did some sgraffito and underglaze decoration covered in clear glaze on some pots with nice form. I don't like the decoration though and some of my pots tipped over in the kiln and stuck together marring the glaze. Can I reglaze over clear glaze? Also, can I put an earthenware glaze over a fully fired stoneware piece with a clear glaze and refire at the lower temperature with a decent possibility of success? Or is this futile? Thanks for your insight smile.gif

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You can touch up the glaze and refire, however the glaze may run more. You could also touch up with the low fire clear, however any rough bits from the high fire glaze won't smooth over, and you may get some color shift from the underglazes.

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I dont understand some parts ... please clarify if you like.

 

I did some sgraffito and underglaze decoration covered in clear glaze on some pots with nice form.

I don't like the decoration though ...

You dont like the sgraffito or you dont like the clear glaze?

 

and some of my pots tipped over in the kiln and stuck together marring the glaze.

Did it rip the glaze off some and leave sharp pointed messes on others?

 

Can I reglaze over clear glaze?

Yes, but you would have to grind down any rough areas and it will not really hide the bare spots.

 

Also, can I put an earthenware glaze over a fully fired stoneware piece with a clear glaze and refire at the lower temperature with a decent possibility of success?

What do you mean by "an earthenware glaze"? No glazes I know of are limited to certain clay types. They go more by temperature range.

 

Or is this futile?

Probably. Odds are very high that you will dislike the results even more and will have spent a ton of time getting unhappy.

 

We all spend time chasing cracks, flaws and such ... that time is mostly always wasted.smile.gif

 

p.s. as regards to the Randy Au reference ...

there is a HUGE difference between multiple glazing and firings that are done on purpose and those that are done to try to fix or hide stuff.

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You could try brushing enamel on the clear glazed and fired pieces (I don't mean glaze, I mean enamel - you can buy it powdered in a lot of different colors and mix it with (for example) Linseed Oil to brush it on, or you can buy the already mixed version). But maybe, if the sgraffito is already too busy, that would ruin the piece totally.

Anyway: after brushing the enamel over the fired clear glaze, you have to fire the piece again to bisque temperatures.

 

Maybe the better way would be to think: ok, that wasn't my best. Let's start from scratch.... One of my teachers always told me to have the courage to throw away pieces that you aren't 100% satisfied with.

 

Evelyne

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Chris is right, some times it is better to drop kick our less than best work into the waste bin than spend precious time trying to fix it. There is always some to learn from the things that did not work out the way we wanted.

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"p.s. as regards to the Randy Au reference ...

there is a HUGE difference between multiple glazing and firings that are done on purpose and those that are done to try to fix or hide stuff.

"

Chris,

 

VERY TRUE: but , if anyone does, he knows what can be done and not .... and about all the temperatures .

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Chris is right, some times it is better to drop kick our less than best work into the waste bin than spend precious time trying to fix it. There is always some to learn from the things that did not work out the way we wanted.

 

 

yes,but .....

i had to do it to figure out when it was and was not worth the effort. I have this piece that was ugly now after a lot of effort - it is super ugly! :Psrc="http://ceramicartsdaily.org/community/public/style_emoticons/default/tongue.gif"> - I keep it to remind me.

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Chris is right, some times it is better to drop kick our less than best work into the waste bin than spend precious time trying to fix it. There is always some to learn from the things that did not work out the way we wanted.

 

 

yes,but .....

i had to do it to figure out when it was and was not worth the effort. I have this piece that was ugly now after a lot of effort - it is super ugly! :Psrc="http://ceramicartsdaily.org/community/public/style_emoticons/default/tongue.gif"> - I keep it to remind me.

 

 

My favorite is when someone has a really ugly pot they want to save, they say ... Oh, I'll just raku it.

Raku is not that magical. : - )

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Chris is right, some times it is better to drop kick our less than best work into the waste bin than spend precious time trying to fix it. There is always some to learn from the things that did not work out the way we wanted.

 

 

yes,but .....

i had to do it to figure out when it was and was not worth the effort. I have this piece that was ugly now after a lot of effort - it is super ugly! :Psrc="http://ceramicartsdaily.org/community/public/style_emoticons/default/tongue.gif"> - I keep it to remind me.

 

 

My favorite is when someone has a really ugly pot they want to save, they say ... Oh, I'll just raku it.

Raku is not that magical. : - )

 

 

Yes, and ugly Raku can really be. . . UGLY!

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I dont understand some parts ... please clarify if you like.

 

I did some sgraffito and underglaze decoration covered in clear glaze on some pots with nice form.

I don't like the decoration though ...

You dont like the sgraffito or you dont like the clear glaze?

 

and some of my pots tipped over in the kiln and stuck together marring the glaze.

Did it rip the glaze off some and leave sharp pointed messes on others?

 

Can I reglaze over clear glaze?

Yes, but you would have to grind down any rough areas and it will not really hide the bare spots.

 

Also, can I put an earthenware glaze over a fully fired stoneware piece with a clear glaze and refire at the lower temperature with a decent possibility of success?

What do you mean by "an earthenware glaze"? No glazes I know of are limited to certain clay types. They go more by temperature range.

 

Or is this futile?

Probably. Odds are very high that you will dislike the results even more and will have spent a ton of time getting unhappy.

 

We all spend time chasing cracks, flaws and such ... that time is mostly always wasted.smile.gif

 

p.s. as regards to the Randy Au reference ...

there is a HUGE difference between multiple glazing and firings that are done on purpose and those that are done to try to fix or hide stuff.

 

 

So, some of the underglaze and sgraffito decoration is just right. Some have colors that annoy me. I didn't mix the clear glaze properly - it was my first time. It was Laguna cone 5 transparent with no directions. I read that clear glazes should be thin like skim milk so that's what I did and I didn't put it through a sieve. Also, I didn't realize that the Laguna dry glazes need more additives to stay suspended. Anyway, it left my speckled buff clay mugs feeling sandy and therefore not functional? And yes, when they tipped it pulled a small piece off one and stuck it on the other.

 

I can't get more clear to stick to them. Tried heating them and hairspray (read in a blog). Some 05 glaze I have sticks though :)

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Well, you were all correct. Trying to "fix" pieces is a big waste of time and sets one up for multiple disappointments. Trash. Must remember, for now especially, its all about the process, and learning. Let go and move on. Ceramics is great zen training.

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