Would 3d-printed objects outgas in vacuum? I want to fabricate a sample holder and shadow masks to use in vacuum chambers. The type of printing material is not important to me PLA/ABS/PC-ABS/nylon).

I'm worried that 3d printed objects (FDM) would degas under high vacuum. Is that an actual concern?
I found much the same question at Does PLA outgas? An answer there pointed to a NASA outgassing database, Outgassing Data for Selecting Spacecraft Materials, and says that:


  ABS (unknown supplier), MakerGeeks PET and Makerbot PLA have been measured and are listed in the NASA database.


Poster there recommended PLA for lower outgassing, and clear PLA because there would be fewer additives to complicate the problem.