I’m kind of embarrassed that this little bag of bone slices that @drea gave me many months ago has been sitting idle all this time. Also, about the same time I bought some tagua nut slices (for you vegans) off of Etsy, and have done nothing with them either.
So today was the day. I loaded up my png files (most of the files were from the Dover Designs “Celtic Designs” CD) and engraved on them (settings will be in a separate file which I will link to). Interestingly, the bone turns black when engraving so no ink is required, but the tagua nut did not discolor at all. For the tagua nuts, Internetz recommends oil based paint rather than ink (which I believe, since the center tagua nut engraving was inked with Memento Tuxedo Black ink and it stained the unengraved nut as well). The oil based color that I used for the other two engravings was Delta Stencil Magic creme stencil color that I’ve had forever. Apparently it’s been discontinued but the same effect should result from using oil paints.
Bone engravings (pencil for scale):
Tagua nut engravings:
Tagua nut before and after inking:
I was amazed at the quality of the engraving on both bone and tagua nut. Thanks again for the bone @drea!