Fine/Thin white cut line on glass?

[Bryan]

If I fuse one color on top of another color, the top piece
being smaller, ie.. 2" square on to a 4" square, sometimes
I can see a thin white gray line. This is all 1/8" glass. Are
there any methods/tricks to make these lines go away
or become very very faint.
Is this a result of a novice cutter.
Thanks in advance.
BZody

These lines are @ the fuse point, if thats the correct verbage.

[Bob]

If you haven't used white or grey glass in the project I would think that the mark is from the ground edges of the piece (assuming they were ground) or some sort of devitrification. Try cleaning the pieces thoroughly, and minimising the amount of glue (if you are using glue).

What colours are the glass?

Cheers,

Bob

[Jackie Beckman]

It sounds to me as though you are using colors that react with one another. There will be a fine "outline" where the colors meet. There are lots of colors that react with eachother. The only way I know for sure to not have a reaction is to seperate the two reacting glasses with a layer of clear - or thin clear if you are wanting to avoid thicker finished pieces.

[Judy Schnabel]

Bryan,

My guess would be from grinding the edges -- if you are grinding that piece of glass.

My solution to avoid those ugly gray lines is scrub it really well with a toothbrush then put a little Super Spray on the outside edge of the glass.

Judy

[Jackie Beckman]

oh yes, if you're grinding the glass that would do it too - sorry I didn't see that part.

In the archives there is a bunch of info on avoiding devit on ground edges. Everything from not firing on the old thinfire to soaking the ground pieces in a bucket of water right away to avoid allowing the grinding "scum" to dry on the glass

[Bryan]

Thanks for the info, but I'm just cutting no grinding.
Have i read somewhere that a ten minute soak in
glass etching solution may work?
Thanks
BZody

[Jackie Beckman]

Thanks for the info, but I'm just cutting no grinding.
Have i read somewhere that a ten minute soak in
glass etching solution may work?
Thanks
BZody

Well then, it just may be reactive colors. Tell us what they are -

[Bryan]

system 96 opals mostly dark/ bold colors.

[Tim Swann]

I would agree, it sounds like you are getting a reaction between the different colorants in the glass.

Tim

[Barbara Muth]

There's no way we can confirm that it is reactions between the glasses without knowing which specific colors you are using.

[charlie]

i've seen this occur on non-reactive glasses. it's the beginnings of devit, and i've gotten it off a cut and non-ground edge.

for example, a black irid coated on top of black glass, thus all b.e. blacks.

try a little borax spray to prevent it from forming. don't put it on irid. i apply with a paint brush so i can get close to the irid in that case.

[Bryan]

Thank you all for the possible solutions.
BZody

[Lynne Chappell]

There is one other possibility. Opals can sort of separate when they melt and the outside edge can be a different color than the center. BE French Vanilla leaves a white edge around the outside for instance.