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Tips, Techniques, and Questions -- Technical questions or tips

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  #1  
Old 2012-09-25, 6:47pm
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Default Difference between Enamel and Powder Frit

I know there is a difference, but what is it? Enamel is finely ground glass. How is it differentiated from powder glass frit?

I've been told that the difference is that powder frits are reactive and enamels are not. But, from a technical perspective, what is the reason for that?

Thanks in advance!
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  #2  
Old 2012-09-25, 7:09pm
Dreamsincolor Dreamsincolor is offline
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Other than the fineness of the grain size I don't know the difference either, but I believe the difference may be an inclusion of a flux agent to help with melting at a lower temp. It may be the reason enamel colors don't mix to make a new color as frit can do.

Andrea
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  #3  
Old 2012-09-25, 8:09pm
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I believe the pigmentation/color saturation in enamels is far greater than in most glass powder. There are probably differences in composition as well, but the color density is what I've noticed most.

Mimi
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  #4  
Old 2012-09-25, 9:20pm
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http://www.glassfacts.info/indexe14a.html?fid=191
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  #5  
Old 2012-09-26, 5:35am
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Lori that is exactly what I was looking for. I'm not sure why the higher metal content makes enamel less reactive, but I guess it must.

I know the COE of enamel for metals is more that twice as high as the COE of enamel for glass. Now I am wondering how that is accomplished.
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Old 2012-09-26, 9:24am
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Quote:
Originally Posted by Elizabeth Beads View Post
Lori that is exactly what I was looking for. I'm not sure why the higher metal content makes enamel less reactive, but I guess it must.

I know the COE of enamel for metals is more that twice as high as the COE of enamel for glass. Now I am wondering how that is accomplished.
I spoke with the chemist at Thompson last winter and was told that enamels for metal were 85-120 COE.
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  #7  
Old 2012-09-26, 12:53pm
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The Thompson website states, for metal enamels, "Coefficient of expansion range: 258-360 cubic expansion."

Maybe there is a difference between cubic and linear CoEs?
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Old 2012-09-26, 9:57pm
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Originally Posted by Elizabeth Beads View Post
The Thompson website states, for metal enamels, "Coefficient of expansion range: 258-360 cubic expansion."

Maybe there is a difference between cubic and linear CoEs?
Give them a call. I can't remember the name of the person I talked to but he was super nice and chatty.
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Old 2012-09-27, 1:16pm
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They mix the pigments and metals with different COEs.They have some for 104 the 9000 series, one for 90-96, 7000 series, There are also ones for window glass, and metals, don't know the series # for those. Reusche actually makes some that have a around 50 coe that some people have been using with boro.

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Old 2012-09-27, 1:52pm
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Thanks, I may give Thompson a call. What I was thinking about was adding some glass to enamel on copper (using the enamel made for copper), but I suspect the enamel would crack.
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  #11  
Old 2012-10-03, 9:18pm
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Quote:
Originally Posted by Elizabeth Beads View Post
Thanks, I may give Thompson a call. What I was thinking about was adding some glass to enamel on copper (using the enamel made for copper), but I suspect the enamel would crack.
You can add lampwork detailing over enamel on copper, and you can mix some enamels with frit powder. I've mixed Z99 powder with a couple of different purple enamels, Gaffer copper green powder with willow and bitter green enamel, a Gaffer orange with pink enamel, and had no cracking.
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  #12  
Old 2012-10-04, 6:49am
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You can add lampwork detailing over enamel on copper, and you can mix some enamels with frit powder. I've mixed Z99 powder with a couple of different purple enamels, Gaffer copper green powder with willow and bitter green enamel, a Gaffer orange with pink enamel, and had no cracking.
Thanks for the info! I'm planning to enamel some copper melon beads. I'm wondering if I could use Z99 straight over a flux coat. And would I be better off using a leaded flux or unleaded? I guess I can try some samples on copper scrap first.
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  #13  
Old 2020-04-22, 7:42pm
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Default hi.

Did you try Frit on top of enamel?
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