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The Clear Inner Hub
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| The clear inner hub is the innermost ring of the disc, which contains just plastic - no metal. It's possible to print in this area; however, the apparent color of the ink changes based upon what background is showing through the clear plastic. When the disc is in a dark tray, the ink appears to be printed on a dark surface. If you lie the disc down on a white piece of paper, the ink will seem to have been printed on a light surface. |
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Disc placed in
dark tray
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Disc with
light background
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The more translucent the ink, the more severe the variation. The darkening effect is most harmful to two design elements in particular:
- A solid coat of a Pantone ink over both the main silver surface and the clear inner hub, as in the Chico Hamilton disc above.
- Screened images with low density over the inner hub, as in the Elvis Costello disc below. The light dots appear to drop out entirely, causing the image to seem to stop at the edge of the silver. Subtle detail is obliterated.
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Clear tray, colorful
inside traycard
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Disc with
light background
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There are a number of ways to work around the clear inner hub in your design:
- Don't print there at all.
- Specify a White Flood.
- Print either solid Black or solid Opaque White across the transition. Black will hide the transition very effectively; Opaque White will do a fair job.
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