Large Bubbles in Soft Glass (Moretti/Effrete) - beadmaking
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First - distinquish between BUBBLES and "scum" - bubbles are big and float around and pop open on your beads - that's a bubble. If you have tiny foam - that is scum... see Clean Rods
Is this common with Morretti? And that some colors have more than others?
| VERY common with White and the color Teal (transparent) that you are
referring to - and happens with other colors also.
The cure - more heat. (except with a Hot Head - which won't cure the problem in teal - see comments at end)
I find that the white reacts more to some bead releases than others - making
I have found I have LESS of this problem in general with the FUSION brand
As for getting rid of annoying bubbles - move the bead so that the flame touches ONLY the
surface of the glass just above the bubble you are trying to remove - this
heats and thins the glass above it - causes the bubble to expand, rise, and
I'm not sure you're talking about Teal or Dark Aqua? The color that
Mike Frantz sells as Teal (91-026) doesn't give me any problems at all.
However, his Dark Aqua (91-036) has all the characteristics that you and
Cheryl have described. I agree that it's pointless to use that glass
without an oxygen torch.
Now, to add to what Cheryl said about the "heat" - I also agree that IF
IF YOU ARE USING A HOT HEAD....... - not a mixed fuel torch....
that may be part of the problem.....
You won't have much success with the teal transparent on the Hot Head... not hot and clean enough a flame.... it will be scummy and nasty.I seemed to have more bubbles in white using a Hot Head and MAPP gas. I think it is due to the fact that the Hot Head is NOT as hot as a mixed fuel torch, and that the bubbles expand slowly and are more difficult to drive out of the glass than with the hotter flame of a mixed fuel torch. Additionally - it crossed my mind that the fuel (MAPP) may be reacting to the glass ... but I have no data on this.
You will also eventually discover the difficulty with working the opaque turquoise colors, petroleum green, and sky blue -these have a bad habit of turning black and shiny (oxidation) in the Hot Head flame. With a mixed fuel torch the solution is turning the oxygen up higher, something you cannot do with a Hot Head.
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