… Bones and horn-cores, unworked, defatted, simply prepared (but not cut to shape), treated with acid or …
Explanatory notes
… 05.06 ‑ Bones and horn-cores, unworked, defatted, simply prepared (but not cut to shape), treated with acid or … acid 0506.90 ‑ Other The products of this heading are used mainly as carving materials, for the manufacture of glue and … and which, without having lost their original form, retain only their cellular tissue and cartilaginous parts (ossein) …