Frit-Happens !

Lampwork => Common Problems => Topic started by: Tonyb on January 20, 2014, 11:57:30 PM

Title: Dark edge around white frit
Post by: Tonyb on January 20, 2014, 11:57:30 PM
Hi,

I'm a newbie and have made 3 beads using red as a basecolour and white frit. What happens is that I get a dark grey outline to the white frit.

Is this just the chemical reaction between these 2 colours or do I have the flame wrong?


(http://farm8.staticflickr.com/7357/12060054556_4a77c64e83_z.jpg) (http://farm8.staticflickr.com/7357/12060054556_4a77c64e83_z.jpg)

Thanks
Tony
Title: Re: Dark edge around white frit
Post by: Dragonfire Glass on January 20, 2014, 11:58:44 PM
It's a reaction - use it to your advantage  ;D
Title: Re: Dark edge around white frit
Post by: Shirley on January 21, 2014, 12:01:07 AM
Rather nice reaction, if you ask me :D
Title: Re: Dark edge around white frit
Post by: Margram on January 21, 2014, 09:04:44 AM
If you do want to avoid it, try encasing the base bead in clear before adding frit :)
Title: Re: Dark edge around white frit
Post by: MeadMoon on January 21, 2014, 09:08:48 AM
I like that effect, although appreciate that it was not what you planned.
Title: Re: Dark edge around white frit
Post by: Donna@Rockin' Beads on January 21, 2014, 09:30:58 AM
I rather like that too  ;D
Title: Re: Dark edge around white frit
Post by: Tonyb on January 21, 2014, 09:35:50 AM
Thanks everyone.

Are there colours that cause this more than others - do all reds do this, or will it only be this particular red and others might not give this effect?.

Thanks Tony
Title: Re: Dark edge around white frit
Post by: Zeldazog on January 21, 2014, 09:49:43 AM
There are lots of colours that react, Tony

I don't know the equivalent colours in lamp-working glasses, but in terms of Bullseye glass, you can expect reactions between copper bearing glass (turquoise, greens, etc) or lead bearing glass (a strange mix of colours here, but includes white) and Sulfur bearing glasses (reds, yellows, creams) - and then you can also get reactive clear glass (in Bullseye anyway) although they don't say why that reacts (magic, I guess).  And then add silver leaf/foil into the mix too...

Bullseye Reaction Chart (http://www.bullseyeglass.com/methods-ideas/glass-reactivity-chart.html)

Remember the above is for Bullseye fusing and rods. I am sure there's a Coe 104 one around too,


Not ALL colours will necessarily react - there are plenty of stable blues and whites, although it looks as though the majority of red range are reactive (again, I am only referring to Bullseye).
Title: Re: Dark edge around white frit
Post by: Zeldazog on January 21, 2014, 09:52:08 AM
Meant to say, great reaction.
Title: Re: Dark edge around white frit
Post by: Lynnybobs on January 21, 2014, 09:54:41 AM
I think its beautiful ! I love reactive colours though they make interesting patterns !
Title: Re: Dark edge around white frit
Post by: flame n fuse on January 21, 2014, 10:28:28 AM
That's interesting, what glass did you use? in effetre glass, you can get great reactions with copper green, but the lines are much thinner than in your reaction.
Title: Re: Dark edge around white frit
Post by: Shirley on January 21, 2014, 12:43:37 PM
Why not try a bit of experimenting to see what happens with different glasses? Which frit is it, by the way?
Title: Re: Dark edge around white frit
Post by: Tonyb on January 21, 2014, 01:28:21 PM
Quote from: flame n fuse on January 21, 2014, 10:28:28 AM
That's interesting, what glass did you use? in effetre glass, you can get great reactions with copper green, but the lines are much thinner than in your reaction.

It if effetre - 591432 Opaque Medium Red with Enamel White frit.

Tony
Title: Re: Dark edge around white frit
Post by: Miriam on January 22, 2014, 05:46:25 AM
I think the white particles in the frit are not white but ivory. Ivory reacts with several colors like the special colors, copper holding colors etc.
Title: Re: Dark edge around white frit
Post by: JanieD on January 22, 2014, 09:40:30 AM
I have this frit, and also the Kugler Dense White for this very reaction - they are the nearest thing to Zimmerman Z74 frit which was one of the ingredients in Val Cox Silver Lake.

The frit goes a beautiful feathery blue over silver leaf and is great in organic beads.

Don't think it's ivory though.




Jane
Title: Re: Dark edge around white frit
Post by: Zeldazog on January 22, 2014, 10:18:44 AM
I agree with Janie

Going be Bullseye glass, both Dense white opal and translucent white opal are lead bearing glasses, whereas French vanilla (the B/E version of reactive ivory) is a sulphur bearing glass, as are all of the rich strong reds - therefore you wouldn't get a reaction between ivory and red (assuming they use similar sorts of base formulas)
Title: Re: Dark edge around white frit
Post by: Shirley on January 22, 2014, 10:35:19 AM
No, it's not ivory. It's very white. The one that is more ivory is Val Cox Cashmere White.
Title: Re: Dark edge around white frit
Post by: Dietmar on March 24, 2020, 08:11:12 AM
Quote from: Tonyb on January 21, 2014, 01:28:21 PMIt if effetre - 591432 Opaque Medium Red with Enamel White frit.
Here we go...
The red contains a cadmium compound with sulfur, selenium or tellurium as the colorant. The enamel white contains lead as a majour ingreadient to get a lower melting temperature. The lead causes a very low surface tension and makes the enamel "creep" over the bead. Finally, there is a reaction between lead an sulfur (...) that gives black lead sulfide.

If you use Effetre white (the regular one) you'll get white dots with a sharp edge. Ivoury (both) works simillar, but makes less defined edges on the dots and doesn't get the grey to black halos.