How are you making these now? They look like really nicely 3d printed parts, but they could also be a mold....
They are 3D printed in what Shapeways call Ultra Frosted Detail I believe.
Wow, they look REALLY good. I just must be used to 3d printers with really low resolution/prototype speeds.
Shapeways has this material called Frosted Ultra Detail, it's the only one you can use with the topre slider. When I opened the box this morning I was completely blown away. Really impressive quality but it also costs x5 compared to any other material.
Consider that my first try done with a standard material (also rated high quality) was a complete disaster, so I wasn't sure it was going to work.
Anyway the model has still some very little errors, as soon as it's 100% perfect I have no problems at releasing the 3D model.