glass engraving problem

[loyedp]

hi

i need help to solve problem while engraving glass, i m raster engraving on sheet of full size, my problem is that even though give less power n maximun raster speed, when i touch engraved portion, the powder of glass removes ,leading it to bad finish.Is there any solution for this prob,or can i apply some spray on glass so tht i dnt get bad finish even if i touch.

[Litografa]

Try to engrave thru wet newspaper

[SkipW]

I've had good results using a thin coating of liquid dish soap on the glass before engraving. You may still get some glass residue but most comes off when you rinse off the soap after engraving.

You can go over the engraving with a shop vac and brush attachment also.

[loyedp]

as it is a full sheet of glass,i feel after few minutes this wet newspaper will get dried , any way let me check it.. as it is a rastering process may be i have to change fastly to dried .. any ways thks 4 ur valid help
i wil check it

[Litografa]

If you have a lot of work with flat glass engraving - look on our impact engraver
http://www.litografa.lt/index.php?aid=255
or if you have simple graphics - use sandblasting

[fantasy2]

What about oil with a low viscosity? It won't vaporise..

[SkipW]

Originally Posted by fantasy2 What about oil with a low viscosity? It won't vaporise..

Isn't there the chance that the oil could burn?

Heh heh hmm fire! fire! fire!

[fantasy2]

hmm, yes you're right.

I never tried it, just a thought, but if it's a big piece of glass. Maybe first a wet paper and then cover it with that sticky plastic they use to cover food so the water can't vaporize?

[SkipW]

Originally Posted by Litografa If you have a lot of work with flat glass engraving - look on our impact engraver http://www.litografa.lt/index.php?aid=255 or if you have simple graphics - use sandblasting

Those are some very nice engravings. Were they done with your impact engraver?

[loyedp]

I think oil is dangerous as it might hav the tendency to burn, it has a risky factior involved in this process pushing me back towards not trail out this work

[Litografa]

Yes, SkipW - done with impact.
More samples is here (you will love them but be carefull - file is about 5 Mb)
http://www.litografa.lt/picture/uplo...ples%20mid.pdf
Idea is similar with Metaza but oriented for bigger size - for example MINIMUM table size is 30x40 cm, and MAXIMUM is 80x190 cm. So honestly speaking - our equipment is not for dog tags
If we speak about impact engraving on glass, main difference from laser is that impact needle leave DOT WITH CERTAIN DEPTH (small, but depth). In this case you can add inks/paints inside and if you use pigment inks like MAIMERI - image will not fade. Laser ONLY change color/structure of glass from transparent to matt.

[bevins]

Is it a special bit you use or something else about the machine thats different for engraving glass?