Thanks. So the powder is poured into the envelopes (metallized film), placed into a mold, and another part or parts of the mold then surround it all, pushing it into the target shape, and then part or all of that mold is put completely inside the vacuum chamber. Alright - I think that solves...
VIPs are shaped like thick rectangles (fairly-flat boxes, cuboids), for example 20 mm x 400 x 600 mm. If manufacturing started with a sheet of styrofoam - a thick rectangle - I would not be surprised that the VIP has the same shape. In videos I've seen* of vacuum-packing loose powders, the...
