Custom Guidelines



Depending on the type of box needed, you will need a different flute profile. For mailers where high print detail is required, we recommend E or B flute, because the surface is very smooth. C flute is the most common for printed regular (RSC) boxes and is a nice mix of cushioning and good print quality.


In general, the same colour will appear darker when printed on kraft compared to white corrugate, as seen below. Complex graphics and full-colour ranges look great on white. But we recommend only one or two solid colours on kraft for the best appearance.


Structural Design of the box must be 100% approved before the structural line drawing will be released for artwork application to either sales rep or customer.

  • Native vector files in .eps, .ai, or .pdf format. Vector files are the PREFERRED FILE FORMAT.
  • Importing an image into Illustrator does not make it a VECTOR; it must be originally created in a vector base application.
  • Minimum of 300 dpi (dots per inch) or higher resolution rastor CMYK .jpeg or .tiff. Increasing your dpi on an already low dpi file will not work
  • Screenshots and web images are low resolution and not acceptable (PNG, HTML, GIF)
  • If only low resolution images are available there will be a service charge to create usable files
  • All files are required to be 100% on a 1:1 scale to the die line.
  • Keep files layered; have artwork on a separate layer from the die line so adjustments can be made if needed.
  • EMBED all images, or provide the linked images.
  • BLEED art and images a minimum of 3/8" past the die cut edge.
  • Seek assistance if you are not sure what the "safe veiwable areas" of the box are.


  • Convert all fonts to OUTLINES to prevent font errors and have your file print ready.


  • All ARTWORK must be kept 1/2'' AWAY from all cuts and scores on slotted cartons.
  • Steel die cut boxes can have print over scores and cuts and a minimum of 3/8" bleed past the die cut edge.
  • Rastor files are not acceptable for making flexo print plates.
  • Keep text and images bold and as large as possible: type must be 6 pt or larger.
  • Lines must be 2 pt or thicker.
  • Artwork containing complex shading, gradients and other effects are not recommended. Keep images solid colour for best results.
  • If a colour is required other than black, a colour number must be provided: Pantone (PMS) or GCMI. GCMI COLOURS are standard in the corrugate industry and preferred by Whitebird.
  • Pantone colours can be printed for an up-charge
  • Colour can depend on the board colour to which the ink is being applied.
  • Board colour (Kraft,White/Oyster, other) must be specified.
  • If colour matching is required, a physical swatch may be required as colours cannot be matched based on how they appear on computer monitors, please ask assistance from a Whitebird representative.

Ready to get started with your custom box? Simply fill out the Custom Corrugate Quote form below and a sales rep will reach out to you quickly.

All prices displayed in Canadian Dollars (CAD)