All replication orders (orders for 300+ units) will be silk screened.
We lay a white flood coat onto the disc prior to the silk screen for proper ink adherence.
Should you want a silver base (instead of the white flood coat), you would check the box in the Art section of the project center (on the page after you upload your artwork PDFs) and indicate in the notes section which part of your design you want the silver to show through. This is sometimes referred to as a "silver knock out".
** Note - silver knock out is not available on orders under 300 units.