Subtractive Manufacturing is when a block of material such as wood or metal is machines at to leave a desired shape.
Additive Manufacturing is where material deposits are formed layer upon layer until the desired shape is achieved. The Form1 uses this process to print which is why you can see lines across the whole 3D part. Unless you can get hold of a multi-million dollar 3D printing machine, consumer printers that use this form of Stereolithography will leave your part with these lines or "steps."
To use this printout for our doll production, I cut off the Support Structures and then sand down the surface with sandpaper preparing it for the next step which is Casting. My goal is to create a copper mold used for mass production of Soft Vinyl.