Photo Engraves on Slate?

[evansd2]

Slate tends to be all or nothing. Its really hard to get greyscale on it. There’s a ton of data in the forums about using oils to pre-treat your slate to get better contrast, here are a couple of threads:

Settings for Engraving on Slate

The coasters came already knapped to a circle. The laser discolors the slate nicely, but there’s no appreciable cutting happening.

Map on slate

A nearly maxed out engrave at 10.5” by 16+“ (18:12 aspect ratio), The map is of Strongsville Ohio from a map of Cuyahoga County in the library of Congress, circa 1858. A gift for some Ohio family members. [image] As always lighting matters, here it is in progress: [image] Thanks to @kittski for her mineral oil slate technique and @Jules for posting settings. Sources, since people will ask… Map: Map of Cuyahoga County, Ohio | Library of Congress Slate: https://www.worldmarket.com/produ…

Slate Etch with Tung Oil

I wanted to make a slate coaster as a Valentine’s gift for my daughter, but I don’t have any mineral oil. Sooo…I do have Tung Oil (100% pure, avoid those thinned with flammable stuff) and so I gave it a try. The result looks great to me and the Tung Oil should cure and harden. Hmmm. Apply the Tung Oil lightly and let it sit at least overnight. Engraved at 900 speed, 30 power, Vary Power, 270 LPI. I’ll let it sit and cure now without messing with the image. [IMG_5719] You can see the colors…

Good luck!