Applies to: Color-managed delivery. The intended printer, profile, paper and proof conditions determine acceptable output.
Keep an editable master in its original color space, then follow the print provider’s requested profile and PDF preset. Do not convert to a generic CMYK profile simply because the job will be printed; the correct conversion depends on the press, ink, paper, and provider workflow.
Screens and presses reproduce color differently
Displays create color with red, green, and blue light. Many printing processes use cyan, magenta, yellow, and black inks or toners. The colors either system can reproduce form a gamut, and the two gamuts do not match exactly.
Very bright blues, greens, and saturated screen colors may shift when mapped into a particular print space. The result depends on the output device, paper, ink, profile, and rendering settings—not only on the file saying RGB or CMYK.
Ask for the delivery specification
Some commercial printers want a specific CMYK profile and PDF standard. Others prefer profiled RGB files so their workflow can perform the conversion for the actual press. Office and photo printers often expect RGB input from ordinary applications.
- Ask the printer for accepted file formats and color profiles.
- Confirm whether they want RGB, CMYK, or a print-ready PDF preset.
- Keep the original editable file unchanged.
- Embed or preserve the requested profile.
- Use soft proofing when the workflow supplies an output profile.
- Order a physical proof when color is business-critical.
Avoid unmanaged conversions
Changing the document mode without choosing the intended source and destination profiles can produce dull color, weak black, or unexpected total ink. Repeated conversions can also discard color information.
Screens must be reasonably calibrated for soft proofing to help. Even then, reflected light from paper cannot look exactly like light emitted by a display.
Judge color under the right conditions
Review a contract or production proof under consistent lighting. Check neutral grays, skin tones, brand colors, fine black text, gradients, and photographs rather than focusing only on a colorful cover.
For logos and brand work, supply defined spot colors or measured standards when the printer supports them. An RGB or CMYK numeric value alone does not guarantee identical appearance across devices.
Ask a question the print provider can answer precisely
Instead of asking only “RGB or CMYK?”, request the accepted PDF preset, source or output profile, bleed, and whether the provider will perform color conversion. Record that specification with the job so a later reprint uses the same assumptions.
Keep a master before conversion and compare neutral gray, dark text and any important brand color in a proof. A simulated screen comparison cannot establish the appearance of ink on a particular stock. If a proof differs, resolve the profile and viewing conditions before making arbitrary channel adjustments.
Sources and further reading
Vendor instructions and background references are linked below. Worked examples are our explanatory calculations, not vendor performance claims. Check the instructions for your current software and device.
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