Four-Color Process for screen printing (CMYK)

Is a method of printing that uses four colors (Cyan, Magenta, Yellow, and Black) to produce full-color images.
Four-Color Process for screen printing (CMYK) with Underbase

Four-Color Process Screen Printing is a method of printing that uses four colors (Cyan, Magenta, Yellow, and Black) to produce full-color images.

Cyan, Magenta, Yellow and Black are also called Process Colors and are used in Four-Color Printing to reproduce other colors.

Some colors such as green and orange are especially difficult to reproducing in the CMYK model. If you want that green and orange were brighter and saturated, they can be printed as additional Spot Colors.

Fluorescent and metallic colors cannot be printed by mixing of four process colors. These colors also should be printed as additional Spot Colors.
Four-Color Process for silk-screen printing differs from traditional offset printing.

We can make high-quality color separation of your artwork for light and dark T-shirts.

Acceptable File Formats

We accept the following PC or MAC file formats:

Preferred file format:


Also Accept file format:

ADOBE Illustrator (*.EPS, *.AI)
ADOBE Acrobat (*.PDF - Portable Document Format)
COREL Draw (*.PSD, *.EPS, *.TIF, *.AI, *.CDR)COREL Photo Paint (*.PSD, *.EPS, *TIF)
MICROSOFT PowerPoint (*.PPT)
MICROSOFT Publisher (*.PUB)
TIFF (*.TIF; *.TIFF - Tagged Image File Format)
JPEG (*.JPG, *.JPEG - Joint Photographic Experts Group Bitmaps)
BMP (*.BMP - Windows Bitmap)

Service Included:

  • Four-Color Process (CMYK)
  • (Color separation of your design into four process colors: Cyan, Magenta, Yellow, and Black)
  • White Base for dark T-Shirts
  • White Base for light colored or pastel T-Shirts
  • Highlight White
  • Brightness and Contrast Adjustment 
  • Color Correction
  • White Balance Adjustment
  • How to print color separations from Photoshop

CMYK process separation mixes 4 main colors (cyan, magenta, yellow, black) to produce a full color image.  This technique is commonly used in offset printing.  When screen printing with process inks some colors like orange, bright red, and green are difficult to reproduce and may be generated by additional screens in order to reproduce a vivid print.  Top white may also be used in order to help blend colors and give the image a pop.

Unlike the above separation techniques, CMYK process inks are transparent and can only be printed on light or white garments.  Although process prints have be reproduced on darks using underlays, I recommend printing with simulated process on darks to achieve a brighter more consistent print.

All process-color separations use Cyan, Magenta, Yellow, and Black to create the colors in an image. These translucent colors blend on-press to create the myriad colors of an image. Process color separations can be made by converting a file to the CMYK mode using Adobe Photoshop®. CMYK inks are transparent and must be backed with white or used on a white background for color fidelity.

Even though most colors in an image will reproduce satisfactorily, to achieve very good results usually require more then just the 4 basic CMYK colors. Adding a highlight white increases contrast and some colors as deep-saturated orange and greens simply do not work well without enhancement. Additional add-on colors may be required for spot color matching or out of gamut colors.

  •  Recommended for white or light colored garments. Increased difficulty on dark garments
  •  Requires the least number of screens for a full color image

...the color separation component of your business is critical to maximize press throughput and this is our business... Pre-press work that stabilizes on-press variables.

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