I stumbled across this method by mistake when exploring the possibility of etching a resist for chemical machining.
Using a standard Sharpie marker, if you colour an area of metal, then laser over it you are left with a reasonable quality and permanent mark anywhere the laser ‘engraves’ the surface. Using isopropyl alcohol, the remaining marker is easily removed.
You could use this method as a cheap and easy way to engrave names or custom designs onto tools.
I have tried this on what I believe was brass and stainless steel.
This method does not provide as high a contrast as specialty metal marking products like Spectrumark or Cermark, though I have done minimal testing with variations to the settings.
It appears to have similar durability to the professional products.
As Stuart mentions in another of his posts, there must be a chemical in the product reacts with the metal when heated with the laser.
I remember a long time ago someone was able to engrave with mustard. I tried this years ago on the E1 but just ended up with mustard scented bits of metal.
Ah, thats right - I remember seeing this!
It’s great to know it works with aluminium also.
Have you tried this on coloured anodised aluminium? Usually we would see the anodising removed to leave a bare aluminium surface - I’m wondering if you get that or black with this method?
