OCS for Print Production
OCS bridges the gap between digital color specification and physical output by making substrate intent part of the color identity.
Substrate-Aware Color
A color on coated paper looks different than the same color on uncoated stock. OCS accounts for this by including a substrate code in every color ID. When you specify OCS-7055-025-C, the "C" tells the printer this is intended for coated stock.
To see the same color defined for uncoated paper, look for OCS-7055-025-U. The LCH values are adjusted to account for ink absorption and surface texture differences.
How Substrates Shift Color
| Substrate | Lightness Shift | Chroma Effect | Notes |
|---|---|---|---|
| Coated (C) | None (reference) | 100% (reference) | Baseline. Most saturated print output. |
| Uncoated (U) | -3 points | 82% of reference | Ink absorbs into fibers. Softer, warmer feel. |
| Textile (T) | -2 points | 72% of reference | Varies significantly with weave and fiber type. |
| Film (F) | +5 points | 88% of reference | Backlit use increases perceived lightness. |
Using the Substrate Simulator
The Substrate Simulator previews how any OCS color appears across all six substrate types. Use it during the proofing stage to set expectations with clients before physical samples are produced.
Proofing Workflow
- Select colors from the library using the Coated (C) substrate as your starting point.
- Use the Simulator to preview the target substrate.
- Note the adjusted LCH values and provide both the base ID and the substrate-specific variant to your printer.
- Request a physical proof on the actual substrate for final approval.
Specifying Colors for Print
When handing off to print production, include:
- The full OCS ID (e.g.,
OCS-7055-025-U) - The LCH triplet for reference
- The substrate type and any special stock requirements
- A note if the color is out of sRGB gamut (the print gamut may still support it)