Hey, so i don’t know if anyone has ever done that in the past but, as my title says, i was wondering if anyone here has ever used some powder or something of the sort, so that whenever you engrave it with your Glowforge, it leaves a coloring to the item itself. I remember using a 1:1 mix of laser marking powder and alcohol on stainless tools like utensils, but that only left a black coloring to them.
I think you are looking for the holy grail, I hope you find something and share the info.
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Here is a post that may be of interest to you: Using laser printer toner for color fill - #2 by smcgathyfay
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I’m almost positive that I remember seeing that Cermark makes some marking spray that does colors…but upon doing a quick search, I couldn’t find anything. I did find this though…might be worth a look.
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YEA, truly the holy grail! - i have emailed with one of the laser marking people about offering it. and they ‘are studying the marketability’ (sigh) sometimes I wished I had a chemistry degree instead of sleeping all thru high school.
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Laser toner was not a bad idea. I’d like to see how that works on metal.
The plastic powder used for powder coating might be worth playing with too, if it’s laser-safe anyway.
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For those interested in marking stainless tools like utensils and such. I’ve been able to do so with the said laser marking powder solution by spreading it on the surface. I don’t have a picture of what the end result is like but, it gives out a nice black finish over it which looks nice and doesn’t wash away after rubbing it in the dish washer. 
EDIT: if you wish to make the process a little easier. I recommend you to make a thick enough frame so you can fit your tool in repeatedly and tape it at the bottom of your glowforge so you can fit your tool in repeatedly. I made over 300+ utensils and it was supeeeer easy.
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I had searched for something like this and only found outrageously expensive products from Australia.
Of interest:
Of great interest:
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