The photo shows the result of a material test on brass using the Omtech laser Marking powder, diluted with 99% alcohol as per the instructions. This test was performed using my Lasertree K30 diode laser.
The markings are permanent, pass the nail scratch test and don’t rub away unless wet & dry used . The actual test included powers up to 100% but I didn’t put the Omtech coating on all the brass and its pretty obvious where the coating stopped - without it there’s nothing marked on the brass.
Applying the coating is easy using the supplied foam applicator. I let it settle for a few seconds then used a heat gun to dry it - its ready to laser within 30 seconds of being applied.
Looking at the results, every speed at and above 25% (approx7.5w) gave solid cover. I also used Omtech powder to engrave a small (9mm round) logo on a thin (1mm) piece of plated brass and had a good result using 14% power, speed 750mm/m and 1 pass. I kept the power low to avoid heating and warping the thin metal.
The Omtech laser powder is a lower cost than the alternatives (in UK its under £19 on Amazon) and looks like it will go a long way. I already had the alcohol
