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chiefman3d

Tin Oxide Question

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Just getting back into pottery after a 20 year "too busy to enjoy life" absence and am having a great time. Mixing my own glazes from recipes I have found online and in books and trying to be economical as possible. I have read several places that Zircopax can be substituted for Tin Oxide at a 2:1 ratio. My question is, Will the glaze come out close to what it is supposed to look like, or do I just have to bite the bullet and spend the big bucks for Tin Oxide? Thanks in advance for any responses.

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Several times in the past, I have tried Zircopax/Tin Oxide comparisons while developing glaze recipes. I have always been disappointed with the Zircopax tests. Too bad, because I was hoping to save some money too. But for me, it's not worth it.

 

Tin Oxide makes a very clean crisp white, Zircopax is a little murky. When combined with other colorants, again Tin Oxide makes crisp colors while Zircopax makes colors a little murky. Maybe it wouldn't seem that way if I wasn't holding the test tile right next to a Tin Oxide test tile, but when the tests are next to each other it's pretty obvious.

 

But what I dislike the most about Zircopax is the flatness of the opacity. Looks a little plastic. It's doesn't interact with edges or surface textures, it's just looks flat. Tin Oxide glazes will play up surfaces textures and edges, and overall has a more natural, slightly undulating opacity.

 

I guess it depends on what you're looking for in a glaze. This is just one potter's opinion, that Tin Oxide is worth the price. Lucky for me I only use it in small amounts.

 

Mea

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Several times in the past, I have tried Zircopax/Tin Oxide comparisons while developing glaze recipes. I have always been disappointed with the Zircopax tests. Too bad, because I was hoping to save some money too. But for me, it's not worth it.

 

Tin Oxide makes a very clean crisp white, Zircopax is a little murky. When combined with other colorants, again Tin Oxide makes crisp colors while Zircopax makes colors a little murky. Maybe it wouldn't seem that way if I wasn't holding the test tile right next to a Tin Oxide test tile, but when the tests are next to each other it's pretty obvious.

 

But what I dislike the most about Zircopax is the flatness of the opacity. Looks a little plastic. It's doesn't interact with edges or surface textures, it's just looks flat. Tin Oxide glazes will play up surfaces textures and edges, and overall has a more natural, slightly undulating opacity.

 

I guess it depends on what you're looking for in a glaze. This is just one potter's opinion, that Tin Oxide is worth the price. Lucky for me I only use it in small amounts.

 

Mea

 

 

Thanks for that info. I use a couple of glazes that use tin and had considered substituting zircopax. I may still do that or do a combo of the two but the info you provide above is very helpful.

 

Jim

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Several times in the past, I have tried Zircopax/Tin Oxide comparisons while developing glaze recipes. I have always been disappointed with the Zircopax tests. Too bad, because I was hoping to save some money too. But for me, it's not worth it.

 

Tin Oxide makes a very clean crisp white, Zircopax is a little murky. When combined with other colorants, again Tin Oxide makes crisp colors while Zircopax makes colors a little murky. Maybe it wouldn't seem that way if I wasn't holding the test tile right next to a Tin Oxide test tile, but when the tests are next to each other it's pretty obvious.

 

But what I dislike the most about Zircopax is the flatness of the opacity. Looks a little plastic. It's doesn't interact with edges or surface textures, it's just looks flat. Tin Oxide glazes will play up surfaces textures and edges, and overall has a more natural, slightly undulating opacity.

 

I guess it depends on what you're looking for in a glaze. This is just one potter's opinion, that Tin Oxide is worth the price. Lucky for me I only use it in small amounts.

 

Mea

 

 

Thanks Mea,

I will order some Tin Oxide as I have several glazes that I substituted zircopax for that just came out of the new kiln this morning and I was not happy at all. I will post those questions on how best to fix them under another heading.

Craig

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@ ChiefMan 3D.....what temp are you firing to? I work between ^05-^03. It does not seem to make much difference whether I use tin or zircopax.....actually I use superpax, which seems to be a little finer than zircopax. I also add a *very* small amount of rutile to my base glazes. It gives them a creamy look, sort of like old lead glazes.

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