Anyone tried marking amber glass?

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Rebekah Emerson
Posts: 2
Joined: Thu Apr 04, 2019
Location: Tampa, FL
Country: USA
Laser Machine Make or Type: Chinese Laser CO2
Laser Power: 50W
Laser Bed Size: 300 X 500
Home Position: TL
RDWorks Version: NA
Windows Version: Mac
Accessories: Rotary attachment.
I also have purchased Lightburn.

I have been trying to get a good mark onto 10ml amber glass bottles. I watched all of Russ's videos on engraving glass, but unfortunately he was always using clear glass.
I have tried the soapy high-frequency impact engraving that Russ likes, and I can get a clean mark, but if oil gets on the marking, the glass goes back to amber color.
All the mark enhancing solutions I have found make the mark darker (to stand out from the clear surroundings).

Does anyone know of a solution to make the mark more white?
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Gene Uselman
Posts: 2180
Joined: Thu Jul 07, 2016
Location: Suburban Minneapolis, Minnesota, US
Country: USA
Nickname: Gene
Laser Machine Make or Type: QC
Laser Power: 130W
Laser Bed Size: 900x1300
Home Position: TR
Control Software: LIGHTBURN
RDWorks Version: RDw .19 & Lightburn
LightBurn Version: Latest
Ruida Controller: RDC6442
Windows Version: Win 10 Pro
Accessories: I have a combining lenses, pin tables [homebuilt], honeycomb tables , wireless remote, Modifed Ultimate Air Assist, home built non-powered rotary device, PrusaMK4 and Mini Prusa printers.

Maybe try wiping with white or light paint and then wiping the non engraved glass clean?
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