Trade name: Acrylic Acetate
Material: Acrylic (PMMA?)
To be honest I don't know exactly what "acrylic acetate" means. I don't' find that term used in any chemistry context -- only in pen blank marketing descriptions. I presume that "acrylic acetate" means polymethylmethacrylate (PMMA) but I could be wrong. If anybody knows for sure, I'd be happy to learn.
Make at home: In theory yes, but not in practice.
Typically these blanks are extruded in sheet or rod form, a manufacturing process requiring heavy machinery operating at high pressure with heat. Acrylic resins, however, are commercially available so somebody could cast their own blanks -- but I haven't seen anybody do it yet.
Colorfastness: Generally excellent.
Clear acrylic (PMMA) is naturally UV resistant and generally does not yellow noticeably with age. There's no guarantee that the colorants (dyes, pigments, etc.) will hold their color, but they usually seem to do pretty well. I've never noticed an acrylic pen blank changing color with time or exposure.
Drilling: Easy to drill.
Turning: Easy to turn with steel or carbide tools.
Finishing: Easy to sand and finish to a high gloss, either with plastic polish, or by buffing.
Threading: Can be tapped and threaded.
Embedding: Yes and no.
Although items can be cast in acrylic, I've never seen an acrylic pen blank with imbedded objects.
Laser engrave: Yes
Cast acrylic lasers a frosty white color. Extruded acrylic engraves with little contrast and will probably need color-fill.
Durability: Very good.
Acrylic is strong, hard, scratch-resistant, and resistant to many chemicals.
Acrylic Acetate blanks are inexpensive and readily available in a wide variety of colors and patterns. Acrylic can be flame or chemical polished, making it a useful material for ink windows in fountain pens.