Author Topic: Engraving Glass  (Read 1610 times)

puttnampete

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Engraving Glass
« on: August 18, 2016, 11:47:26 AM »
Hi all, I have a 2.5w Eeks violet laser and have been getting fed up trying to cut/engrave more than wood, paper, cardboard. I have had some success with glass Microscope slides, I still don't know how it works, that's for you to experiment with. First I tried just Aluminium, no result. Then Glass on top of Aluminium, no result. then I tried Aluminium, layer toilet paper soaked in nitric acid then the glass, no result. Then I tried Aluminium,  layer toilet paper soaked in Hydrochloric acid then the glass, Bingo it worked, but not too good. I found my laser was out of Focus. I done the experiment again and I got first class results, I Etched Text from Benbox and successfully Etched text 0.5mm,.075mm,1.00mm,3.00mm. I have know found with my super focused laser a sandwich of Aluminium, toilet paper, and glass works without using Dangerous Chemicals. Why I don't know......PP

ggallant571

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Re: Engraving Glass
« Reply #1 on: August 18, 2016, 12:02:19 PM »
What do you mean by 0.5mm,.075mm,1.00mm,3.00mm? Can you post some pictures?
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Zax

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Re: Engraving Glass
« Reply #2 on: August 18, 2016, 02:32:10 PM »
That's quite some experiment  :o and glad you found a solution.

You may want to look into a cheap CO2 system, they work really well on glass and you don't need HCI.

I do actually use damp paper on the surface if I'm trying to engrave a lot of detail as it helps reduce the fracture size resulting in a higher resolution but it isn't necessary.

puttnampete

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Re: Engraving Glass
« Reply #3 on: August 19, 2016, 08:29:04 AM »
What do you mean by 0.5mm,.075mm,1.00mm,3.00mm? Can you post some pictures?

The 0.5mm etc. is the height of the text in millimetres. cheers pete

ggallant571

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Re: Engraving Glass
« Reply #4 on: August 19, 2016, 08:43:44 AM »
You are etching 3.0mm into glass!! very impressive.
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Agastar

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Re: Engraving Glass
« Reply #5 on: August 19, 2016, 10:20:03 AM »
We would love to see some pictures if you don't mind posting a couple.

beikeland

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Re: Engraving Glass
« Reply #6 on: October 16, 2016, 04:53:26 AM »
I 'accidentally' did the same, threw a pane of glass over a sheet of paper to both keep it flat at prevent it from smoking/flaming up while trying out settings.

But I was surprised to see that the engraving left a seemingly permanent mark on the glass. 2.5w, 100% power, 1200mm/s, 0.1mm beam size.

Had a hard time getting a good picture of the glass etching even on a white background; included a closeup to give an impression of the detail. Glass has been rubbed down with Toulene (acetone like solvent I believe) prior to pictures, so when I say seemingly permanent mark, it survived that at least, and you can feel a texture to the glass as well.

showteam

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Re: Engraving Glass - The easy Way ;)
« Reply #7 on: February 21, 2017, 03:31:30 AM »
Hi @ All!

Engraving Glass works fine with a 2500mW Laser.
The Glass or transparent material just needs a catalyst.
For first tries take a simple PVC-Sticker. Even a line of a textmarker does.

For best results: 
Just get a "window-sun-protection-foile" - self adhesive throu static-load (not the ones with glue for cars).
Cut a piece you need and put it on the glass as described.
Put the glass on a non-burning material (best with a distance-holder between)
Put it under the Laser - and focus (!)
OPEN THE WINDOW (Yes, the real window of your Room, not on PC! (Burning Plastic isn't healthy!))
Start your Projekt!

Clean / rub the glass with acetone or so...

Settings: Laser 255 MAX (0-255)
Speed Line-Mode ~ 50 (0-1500)
Speed Grid-Mode ~ 250 (0-1500)

REMARK:
The setting is almost the same a the settings for 'just' cutting the foil.
So I think the foil is a simple catalyst.
The micro-burning of the foil damages the glass.

By the way:
My first try was engraving a transparent CD-Cover.
I took a Text-Marker to color the plastic. It works fine!

In photos you get the best results by dithering (black/white - no greyscale)
or preparing it by using effects converting to b/w.


Greetings in the Nachbarschaft ;)
(to my german neighbors)
Andreas!