Annealing PLA: Sand vs. Salt

(Michael K Johnson) #1

I have been assuming that annealing in sand would reduce dimensional change during annealing. When I searched, I saw that salt has also been recommended. I couldn’t find any comparisons of the results between sand and salt. Anyone have any data to share?

(Absent any specific information to the contrary, I’d generally prefer salt because I could wash it off and not worry about embedding abrasive silica in my print, unless my purpose was to embed the sand to be intentionally abrasive.)

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(Nathaniel Stenzel) #2

I could imagine that imbedding sand in the surface and then painting over it would give a powder coated look. That might be desirable to many.