Printing with white or white combined with CMYK requires detailed file preparation according to the following guidelines:

General file preparation rules

Graphic elements to be printed in white must be marked in the design with an additional color named “White”.

Creating the “White” color:

• The simplest way is to pick up the color with the eyedropper from our prepared sample: White.pdf or White.cdr
• You can also create the palette yourself by adjusting your graphics program according to our instructions 
  • download  for CorelDRAW: instrukcja_spot_kolor_corel.pdf 
  • download for Adobe Illustrator instrukcja_spot_color_Ilistrator.pdf
• White graphic elements must be placed above the CMYK graphics.
• Apply the Overprint option for the “White” color.

Special notes

• Small elements and fonts: For small fonts or details, visible registration shifts may occur.
• Registration shifts: Exercise particular caution with precise designs requiring exact color alignment.

General file preparation rules

Printing with white or white combined with CMYK requires detailed file preparation according to the following guidelines:

• Elements printed in white must be marked in the design with an additional color named “White” (spot color).
• White graphic elements must be placed “above” the CMYK graphics.
• Apply the Overprint option for the “White” color.

Creating the “White” color

The simplest way is to pick up the color with the eyedropper from our prepared sample: White.pdf or White.cdr.

You can also create the palette yourself by adjusting your graphics program according to our instructions:

• download for CorelDRAW: instrukcja_spot_kolor_corel.pdf
• download for Adobe Illustrator: instrukcja_spot_color_Ilustrator.pdf

How to plan white underprint on special films (practical tips)

Transparent film: 

• white underprint acts as a “background” under CMYK – it allows for full coverage and saturation. 
• Without white, colors will be transparent and dependent on the background.

Metalized film:

• white underprint under CMYK reduces the metallic effect and gives colors closer to classic print,
• no white underprint under selected elements allows you to use the metallic as an effect (e.g. gloss/metallic transitions).
• You can also use partial white underprint (only under selected elements) to intentionally “mix” the coverage and metallic effect.

Special notes for white underprint

Small elements and fonts: for small fonts or details, visible registration shifts may occur.
Registration shifts: exercise particular caution with designs requiring precise alignment of the white and CMYK layers.
Design recommendation:  for thin outlines and fine details, avoid situations where the white underprint perfectly “reaches” the edge of the CMYK element (risk of visible shift). It is better to use a safe margin / intentional simplifications.

Printing with white on metalized films is carried out exclusively as a standalone print or in combination with color (next to) CMYK, without the use of a white underprint. For this type of substrate, CMYK printing is performed directly on the metalized surface, resulting in a characteristic, glossy metallic effect. The white color can only be used as an independent print layer.

Graphic elements intended for CMYK printing should be prepared in the standard way, according to the rules of CMYK color printing. All elements intended for white printing must be marked as a separate layer defined as an additional spot color named “White”.

Creating the “White” color:

• The simplest way is to pick up the color with the eyedropper from our prepared sample: White.pdf or White.cdr
• You can also create the palette yourself by adjusting your graphics program according to our instructions 
  • download  for CorelDRAW: instrukcja_spot_kolor_corel.pdf 
  • download for Adobe Illustrator instrukcja_spot_color_Ilistrator.pdf

UV printing with white enables projects on colored and transparent rigid materials (plaques/signs), ensuring high aesthetics and durability.

File preparation guidelines

White underprint

UV printing on materials (except white materials and milky plexiglass) requires preparation of a white underprint.

Clear plexiglass

• Printing is performed from the reverse side (mirror image).
• Then, white ink is applied, serving as a background.
• Preparation of mirror image designs is the Client’s responsibility.

Document layout
To order printing with white, prepare the document in one of two variants:

• Multipage file:
  • Page 1: Color design (CMYK).
  • Page 2: White underprint.
  • Page 3: Shape for contour cutting (only if a different shape is being cut).
• Separate files:
  • File with color design (e.g. projekt_kolor.pdf ).
  • File with white underprint (e.g. projekt_bialy.pdf ).
  • Optionally, file with the cutting shape (e.g. projekt_ciecie.pdf ).

Preparing a file with underprint

Preparation rules

• Copy the design to a separate file and change all colors to black (100% K).
• Black is automatically converted to white in the machine’s software.

Small texts and elements

• For small texts in black (100% K), white underprint is not required.

NOTE - IMPORTANT

• Objects in white defined as C 0%, M 0%, Y 0%, K 0% will not be printed.

Key, summarized tips for UV Printing

• Colored materials require a white underprint, except for white materials and milky plexiglass.
• Clear plexiglass – printing is done in mirror image with white underprint as the background layer. Preparation of the mirror image is the Client’s responsibility.

White 3D, printed in UV technology, creates a distinctly tactile structure, giving the project a unique spatial effect and elegance.

White 3D – file preparation rules

• The design should be prepared in a single color (K 100%) – all objects and texts.
• Do not prepare designs with bleed – due to ink chipping during cutting.
• The minimum font size is 6 pt.
• It is not recommended to use very thin fonts to maintain a clear print effect.

UV printing with white enables projects on colored and transparent rigid materials as well as flexible materials (films), ensuring high aesthetics and durability.

File preparation guidelines

White underprint

UV printing on materials (except white materials and milky plexiglass) requires preparation of a white underprint.

Clear plexiglass

• Printing is performed from the reverse side (mirror image).
• Then, white ink is applied, serving as a background.
• Preparation of mirror image designs is the responsibility of Printnet.pl

Document layout
To order printing with white, prepare the document in one of two variants:

• Multipage file:
  • Page 1: Color design (CMYK).
  • Page 2: White underprint.
  • Page 3: Shape for contour cutting (only if a different shape is being cut).
• Separate files:
  • File with color design (e.g. projekt_kolor.pdf ).
  • File with white underprint (e.g. projekt_bialy.pdf ).
  • Optionally, file with the cutting shape (e.g. projekt_ciecie.pdf ).

Preparing a file with underprint

Preparation rules

• Copy the design to a separate file and change all colors to black (100% K).
• Black is automatically converted to white in the machine’s software.

NOTE - IMPORTANT

• All objects that should remain in the material color (no print) must be defined as C 0%, M 0%, Y 0%, K 0%.
• All elements in any other color than the above will be printed as 100% white.

Key, summarized tips

• Colored materials require a white underprint, except for white materials and milky plexiglass.
• Clear plexiglass – printing is done in mirror image with white underprint as the background layer.