Hey team,
I’ve got a 60W M7 JPT MOPA. I’ve been colour-finding for a while, and have many excellent blues, golds, purples, and pinks. Where I’m having trouble is getting a vibrant red or green (currently only a light colour).
I’m working exclusively on brushed 304 stainless with a 110mm lens - does anyone have a starting point for me to work from?
Have you read this topic?
Maybe have some information useful for you…
Unfortunately, it doesn’t shed light on what I’m looking for. I understand the mechanism of how the interference patterns are made, I just don’t have a good lead on parameters for those colours.
I’d suggest a materials test with squares large enough to give you a true color.
These colors on this dog tag didn’t reproduce on a larger scale or with a slightly different thickness… So the best way is to do it yourself with the materials test using your specific materials.
I found that the interval changes were very effective, seemingly much more than speed/power.
Good luck
Was precisely that picture I was looking for. 
A Chinese guy told me that the colors can’t be obtained with a 10x10 or 11x11 lens. He said it has to be 17x17 or 20x20. I bought it but it didn’t arrive. I’m trying to make the colors but I can’t. Send me your email and I’ll send you the parameters I have for 60w. But they’re not for light burn, they’re for ezcad. My email is email redacted
Hi Bruno, welcome to the site. You have a nice machine, I have the 60W variant.
I removed your email… the bots have a field day picking up email address from public posts and spamming them.
If someone wants to private message you, then you can return them your email via private message.
I would be nice if @JohnJohn could move this to a new thread… I don’t think it fits here…
If you believe them, then I have a bridge you’d love to own… 
You need to specify a lens, I assume you mean 10x10cm coverage. This relates to a focal length. Smaller area, shorter focal length. My shortest lens is an F100mm with 70x70mm coverage. I’ve used the F100mm lens for colors …
What happens is you heat stainless or preferably titanium to certain temperatures and when it cools it’s oxidizes, inter mixing with reflected light to make what we see as color. So any lens can do it, even some of the very low power diode laser modules.
The MOPA type is best for this as it has more adjustments with how the heat is applied.
I can’t see how a lens length would make any difference as to the mechanics involved.
Use the materials test in Lightburn to help you find the colors. Stainless dog tag and a piece of regular steel.
If you go to Laser Everything site, they have some libraries they give away with lots of settings.
Good luck
