Frit: A Visual Reference
I'm very pleased to be able to provide this reference. Because monitors can alter how a color looks, for the truest colors, I would
highly suggest saving the chart to your hard drive by right clicking and
selecting 'Save Picture As...' then using your graphic editing/printing program,
print out the chart on a full sheet of paper. Also remember that colors can vary
from batch to batch so this can't really be considered a color reference, but
rather a reference as to how the color works and behaves in different
All test beads were made on a HotHead with bulk propane using
• Effetre 204 White
• Either Effetre 264 Ivory or 276 Dk. Ivory
• Either Effetre or Vetrofond 064 Black
• Vetrofond 004 Clear
• Pet Mix, a blend of one part Effetre 218 Petroleum
Green and ten to twelve parts Effetre 204 White.
• Silver, Effetre 204 White rolled onto silver foil
strips. The silver is melted in. Then the bead is rolled in the frit, heated and
shaped like the rest of the beads.
Some colors may react differently depending on whether it’s used as a frit, as a
stringer, melted in or left on top, type of torch, type of gas, annealing
schedule, temperature, which batch it’s from, phase of the moon, how you hold
your mouth while you’re making the bead, or any of a number of other things
that can influence the way soft glass behaves. Please remember this as your
results may differ a bit from mine.
And with no further ado, here is my research. I will add to it as pages are
finished and/or as time permits. Click
on each thumbnail picture to get the large one - then right click on the large picture and
select 'Save as'. Then use your back arrow to return here and get another one. Enjoy!
Some of these frits require special treatment for the full
range of possibilities to show. Since all beads have been treated the same, not
all possibilities may show such as striking or how the color works in an oxygen
Charts may be downloaded and printed for your personal use
only. Any other use requires my written permission.
- You may link to this page, but charts may not be downloaded
to your website and archived or offered there.
© 2005-2011 Kay Powell
This bonus page shows the different sizes of
frit as well as how it can look both as frit and on a bead. Each of the squares
covered in frit is one square inch.
Thanks to Angela (ziggys
on Lampwork Etc.) for suggesting I include a response I posted on the
Art Glass Forum that explains what the tests I do to the frit were designed
to do. I've taken the liberty of doing a wee bit of editing to this response.
Please know that I've tried to do these tests to show
what the potential of the glass is, not just as frits. The only things I
haven't really tried to test are 1) the striking capability, and with
sculptural beads, you may get some interesting effects with repeated heating
and cooling of areas, and 2) how the glass reacts in an oxygen rich flame
(but I'm on a hothead so I can't really test that one) Here is my thought
process in choosing some of the tests I've done:
I've noticed that some frits just sit there on the glass, some will sink a
bit, and some will float and spread out. The overcooked bead tests which of
these will occur.
The 'Pet Mix' is a custom mixed color I've done of white with just a wee bit
of petroleum green. I wanted a color that would show if there is what some
call a copper/sulfur reaction going on, but I didn't want a color as dark as
Sky Blue (I use Effetre Glass). ideally I wanted a color about like that of
Lt. Sky Blue, but I only had a couple rods of this color and everyone was
out of it. So, I had to mix my own. This test shows if a copper/sulfur
reaction is going on.
The Ivory bead tests for the opposite side of the reaction, and a whole lot
more. One of the most surprising and yet interesting things I've noticed
during all of the tests I've done is that most all furnace glass colors will
react with Ivory - except for the reds and an occasional orange, clear, or
green. Not only that, but if a color does react with Ivory, it will most
likely react in a reduction flame by getting the metallic sheen to it. Way
The black and clear beads test for the opacity or transparency of the glass.
Some listed as transparent, and some listed as opaque really aren't, and
some are only mildly so, and so on. Between these 2 test beads, you can tell
where along the continuum the glass really is.
The silver test bead (done by melting some strips of silver foil into the
test bead before rolling it in the frit) shows if a color will react with
As you can see, I'm actually trying to test the properties of the glass and
how it reacts under different situations, not just how pretty the frit is or
what shade it is. I want to know how the glass behaves. For this very
reason, I've also tested the entire Effetre line - well, except for the
alibastros and opalinos which I don't use and aren't available as frits.
And yes, I've gotten some surprising results that could be used to an
interesting effect in beads. For example, did you know that Effetre 220
Periwinkle turns violet in a highly reducing flame? I imagine that could
result in some very interesting and beautiful sculptural beads. Picture a
rose with just the edges of the petals reduced - Periwinkle blue that
transitions to violet at the tip of the petals. Beautiful! - And of course,
if you make one you have to make 2 and send me one! ;-)
I would like to thank those who have contributed to this research. It
would not have been possible without them.
I want to thank everyone for their positive comments on this project, their
their encouragement. It is truly appreciated!