Color deviation is common in digital printing. It usually happens because screens and printers use different color modes, meaning the colors viewed in RGB cannot always be reproduced perfectly in CMYK. This article explains the principles and differences between these two essential color modes to help users achieve better printing consistency.
1. RGB Color Mode (Additive Model)
RGB is formed by red, green, and blue light. It is an additive color mode used in monitors, phones, and TV screens. RGB covers a broad color gamut—much wider than CMYK. Common standards include sRGB and Adobe RGB, with sRGB being the industry-wide standard co-developed by Microsoft, HP, Mitsubishi, and Epson.
Internal link: Latest Standards for Piezoelectric Inkjet Printheads
External reference: https://www.color.org
2. CMYK Color Mode (Subtractive Model)
CMYK uses cyan, magenta, yellow, and black inks. The “K” stands for “Key Plate,” which defines image detail in traditional print.
2.1 How CMYK Works
It absorbs light rather than emitting it. For example, cyan ink absorbs red and yellow, reflecting green and blue, resulting in the cyan we see.
2.2 Why Black (K) Is Needed
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CMY mixed black is dull
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Pure black ink sharpens text
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Improves detail and shadow depth
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Saves ink and reduces cost
2.3 CMYK in Percentages
Examples include bright red (0/100/100/0) or rich black (75/67/67/90).
Internal link: /cmyk-printing-guide
3. Color Gamut Differences & Expanded Colors
RGB has a wider color gamut, so some colors cannot be reproduced in CMYK.
Many modern printers add expanded colors such as LC, LM, orange, green, or violet.
The SAVEN INK team has developed extended color inks—including light cyan, light magenta, light black, bright red, green, orange, and violet—to help users improve image quality and expand their printable color range.
External reference (FESPA): https://www.fespa.com
4. Conclusion
RGB emits light while CMYK absorbs it. Understanding these two color modes helps improve color consistency in digital printing. Expanded color inks offer wider color expression and more realistic output. SAVEN INK will continue providing advanced ink solutions to support high-end color applications.