Hi! As my first post I’ve decided to share one of my projects (lightburn project included), a color engraving of The Great Wave off Kanagawa by Hokusai on 304 steel.
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I am partial, but this is gorgeously beautiful! Very nice execution. 
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Thank you! Nice profile picture you have there. 
Some photos for people who don’t want to/can’t view youtube, since I couldn’t post more than two items as I’m new.
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Nice thinking to also share some images. Thanks. I bumped you to ‘member’, lifting some of the new member restrictions, so that should help.
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Looks great
Out of curiosity, I downloaded the file and I’m doing a test
I’m using a different lens size, but I’m bored anyway ;D
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Nice, let me know how it turns out, also a quick note - the holo layer/effect only works on polished steel and slight defocus ruins it somewhat, so you need to be careful about that.
So it turned out completely different than yours, which I obviously expected
But… your holo is the perfect cleaning setting after engraving for me
Thank you so, so much for sharing the project
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Yeah that’s not unexpected, I’m happy to hear you found an interesting setting testing it, happy accidents. . For anyone else wanting to try it - the settings in the project are for a 60 watt laser using a 200x200mm lens.
Welcome to the site.
Beautiful, what thickness are your blanks?
Thanks for including the lens and power.
Approximately how long did it take? Just curious, haven’t tried to run it. guessing about 30 minutes?
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Thank you for the warm welcome 
Close enough, a bit less than 40 minutes. The blanks are 1.7mm, I bought them on aliexpress, I’d share the link but I’m not sure if that is not against the rules here.
As long as it’s not your company that is basically advertising, I don’ think manufacture links and such are a problem.
Go ahead and post a link — if they want to chop a head off, they can take mine 
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Lets hope no heads will need to roll. 
I’m not in any way affiliated with them, bought multiple times from this ali store, quality has been great:
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Is this on stone
Title says “… on steel”, so I’d take that as definitive.
Third down on the left using @nothing link.
You don’t get that range of colors from steel, it must be stainless steel.
If you follow the description at the aliexpress link, it says
★ Material: stainless steel.
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While the seller does not specify it, they are made from 304 grade steel, I’ve tested them with a reagent. They’re also properly polished which makes the holo effect work and packaged individually so no scratches.
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This looks amazing, I’ve gotta try it!
you said you’ve got a 200mm x 200mm lens, what does that mean? What kinda laser do you have: galvo, gantry, something else?
I’ve got access to a 100W gantry laser, I’m wondering what kinda lens I should try with.
You’ll need a MOPA laser with a galvo, the 200x200mm is the working area of the lens. Technically it might be possible to achieve some limited colors with a fiber source on a gantry, but it would depend on what frequencies and pulse lengths the fiber source supports, what speeds the gantry can achieve and even then your options for colors would be very limited.
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Lenses for galvo fiber machines are normally specified by their focal length, not the coverage area.
This is from Cloudray and is a M85 type lens.
The part number has some key information, but doesn’t always include coverage area. There are also some lenses that have a wider scan angle, giving them a larger coverage with the same focal length. As far as I know, the focal length determines spot size.
I prefer to ID a lens, but what’s on it’s rim, such as an F290mm has a coverage of 200x200mm. I have four lenses and I can’t keep track of the coverage of each as I swap them around a lot. At least the focal length has been definitive as I can get.
F-Theta lenses are flat field focus lenses.
If this is a co2, it’s not going to be useful.
In my experience, lots of things effect the color on these, even a change in ambient temperature seems to change your resulting colors…
Never know until you try… 
Good luck
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