At 06:27 PM 17-09-16, you wrote:
Anyone tried this stuff? Spray it on, run a Laser over it, it turns black and waterproof/permanent. A wet sponge wipes off the unLasered portion.
https://www.cermarksales.com/
I don't know what the lowest power Laser is that can be practically used with this. Their website is a bit light on details.
I found a distributor with a lot more information. It only mentions CO2 and Fiber Lasers.
http://www.engraversnetwork.com/products/thermarkcermark/laser-settings-chart/
I have no idea if one of those blue and green 5,500mW solid state Lasers on eBay, Amazon, and Bangood would work, for instance added on to an existing 3D printer or CNC engraver/carver. CO2 lasers are far IR at around 10,000nm.
Are those solutions color sensitive or only thermal sensitive?
Why not 1W laser with reduced speed 10 times (from the recommended 15cm/sec) for the LMM14 spray?
Cristian