1. Why is Color Mode Important?

In UV printing, images may look vibrant on the computer screen but appear different when printed. Many first-time buyers mistake this for a machine problem, but it’s often due to a lack of understanding of RGB vs CMYK color modes.

2. What Are RGB and CMYK?

RGB stands for Red, Green, and Blue, used by digital displays.

- Screens create color by mixing red, green, and blue
- Vibrant colors for digital use
- Used in websites, cameras, videos, etc.

✅ CMYK is the print color mode.
CMYK stands for Cyan, Magenta, Yellow, and Key (Black), used in printers.

- Printers mix inks to produce color
- Ideal for physical materials like signage, packaging, business cards
- White is provided by the printing surface

3. Why Must UV Printing Use CMYK?

UV printing uses CMYK inks, which cure directly on surfaces. RGB colors are difficult to replicate in ink.

Fluorescent green and bright blue in RGB may not be accurately reproduced in CMYK, causing visible color shifts.

4. How to Convert RGB to CMYK Correctly?

It’s best to start your design in CMYK mode to avoid color conversion issues later.

- Photoshop: Image → Mode → CMYK Color
- Illustrator: File → Document Color Mode → CMYK

5. Are White Ink and Varnish Related to RGB?

White ink and varnish are special channels in UV printing and are unrelated to RGB color space. They are defined in RIP software using separate layers.

6. How Does MYJET Support CMYK Professional Output?

MYJET UV printers (like MYJET-6090C and MYJET-1860PRO) offer:

- CMYK + White + Varnish ink channels

- RIP software for advanced color and layer control
- High-resolution output with accurate color reproduction
- Compatibility with multiple materials: plastic, metal, wood, glass, etc.

✅ Summary

Understanding the difference between RGB and CMYK is essential for UV printer buyers. Using the correct color mode ensures less color shift, higher print satisfaction, and a more professional brand image.

With over 20 years of experience, MYJET provides efficient, accurate, and reliable UV printing solutions for global customers.