resistant under layer?

[Jonathan Overlin]

Hello again,

Poked around the forum, and didn't see a thread (although I am sure there is one!) ....

Looking for a material that could be painted over that would consistently resist rastering when removing an applied top layer of paint, kind of like a scratch board.
I can think of materials that would obviously work, but they also need to be able to be cut into shape while vectoring with my Speedy 100.

Thoughts? paint-on liquid foil? Foil sheets? Inlace liquid stone? I have tried base coat of paint, several layers of clear coat, then top layer of paint, which is inconsistent at best, and time consuming.

Oh yeah, and in the best possible world, it would be inexpensive :)

Thank you, oh Wise Laser Folk!
-Jonathan

[Rodne Gold]

All the engraving laminates do that , remove the cap and the base colour shows thru..and vector cuttable after...

[Dave Sheldrake]

Am I getting the idea you want something re-useable Jonathan?

Avoid resistant reflective foils, backscatter from them can damage your system.

cheers

Dave

[Rodne Gold]

Kinda like an oxymoron (not saying anyone is an ox or a moron so don't take it that way) but you are asking for a laser resistant sub material and the same material must not be laser resistant at the same time (for cutting)...
Whats the application..?

[Chuck Stone]

I've done something similar to scratchboard using MDF, paint and gesso.
I added some powdered marble, titanium white and tints as needed, mostly
because I had the marble powder and wanted a little more beef in the gesso.
Painted on 3 coats, sanding in between, then painted on the top color and raster
engraved. Worked like a champ.
You could vector cut it first and then make yourself a paper/cardboard template
of that outline so you could accurately place it back on the table later.

Apply ONE coat of your top color .. just enough for an even coat. Practice
your settings on scrap material. You want to ju-u-u-u-ussst squeak through
the top layer into your background layer. If you need a solid white, lower your
power and use a higher DPI to overlap the lines when engraving. Engrave in
reverse, obviously.