put a light coat of mineral oil on the slate before etching.
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Pre treat with spray shellac and use full power and speed. I also use spray shellac for engraving on canvas. Its great to have around and it food safe.
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I put a light coat of mineral oil on the slate. Typical height of a slate coaster (including rubber foot) is 0.34". I run at: speed 600, power 80%, and 270 lines.
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trying to figure out how ā is this in a histogram setting? my guess though probably wrong
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You pre treat with spray shellac, then engrave ā then if you are going to use it for meats & cheeses (IOW food), are you going to spray shellac it again to protect the engraved areas so they donāt wear?
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i use the ālevelsā settings in photoshop (ctrl-L)and move the sliders for mid values till they look good
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After that point, do you save it as a PDF or bring it into Illustrator and save as an SVG? I havenāt used Photoshop since I got my Glowforge several years back.
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actuallyā¦ i save it as an uncompressed .jpgā¦
Glowforge does a nice job of ripping bitmapped files as well like .bmps and .jpgsā¦
thenā¦ on slate i use vary intensity to burnā¦ and on wood i usually use ādotsā
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So Iām confused! I did everything exactly as everyone suggested and somehow ended up with this. Now I know someone is going to say my machine must have been bumped during my second pass but I only did one pass so there is no reason for it to look like this.
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Was this done without the honeycomb tray?
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The good news is that you can sand the slate and get back to a fresh surface to re-engrave once you figure out your issue with the GF or design.
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I think itās in the file. The image was inadvertently doubled somehow. Or maybe it was doubled in the GF GUI.
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It was one of my wheels were cracked, all fixed and going for it again right now
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Hi I was wondering how you got it to shadow the slate
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not sure the exact meaning of your question - but happy to helpā¦ the slate itself is āblackā (dark)
the images glowforge burns into them make the slate go āwhiteā (actually just a light shade of grey)
soā¦ i take my image in photoshop and invert it (make it a negative)
verything i want white/light is actually black in the fileā¦ that shadow or fade from left to right is in the photo itselfā¦ dramatic lighting makes for those darker shadows (and painting on top of them in photoshop)
is that what youāre asking?
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Yes that is. Thank you so much. And sorry, I didnāt realize I had a message. Thank you so much for your help
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I see google says coconut oil could be a replacement for mineral oil. Do you think it would work in this application?
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Iād probably go with mineral oil just because it wonāt go rancid over time like a vegetable-based oil will.
You can get mineral oil at any pharmacy, itās extremely inexpensive.
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Cool Thanks.
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