Products > Technical Information

Printing (Artwork Requirements)



  • Between 350 and 400 dpi (dots per inch)

Image Scale

  • Ideally 100%.
  • It is also suggested that the transparency scanning scale is no larger than 200% to avoid losing details and sharpness of the image.

Screen Values

  • Minimum: 3%. If the tint is quite clear colour or white, the smallest dot has to be 0% to avoid dirt.
  • Maximum: 100%



  • Adobe Illustrator or Photoshop

Number of Colors

  • Eight colours

Text Size

  • Minimum: 6 pt (point)
  • Texts/fonts have to be converted to outlines
  • Normal texts have to be made from only one separation
  • The separations around title texts and negative texts should be under 2
  • If the separations around negative texts are over 2, such as in the example of negative texts in a dark image, outlines with 0.3 mm in the most appropriate dark separation (the darkest one) have to be required around negative texts.


  • Barcode numbers can be converted into standard barcodes.
  • Minimum scale of barcode: 85%, Best scale: 100%
  • The colour of the barcode has to be the darkest single separation, while the background colour has to be white or a light colour
  • Bars have to be parallel with the rewinding direction.
  • Barcodes must meet international size requirements


  • The eyemark must be made of darkest colour 100% tint, for example: 100% of black and white underneath with 0.5 mm trapping.
  • The interval between two eyemarks in the rewinding direction has to be a single color or transparent.
  • If using a dark background, the eyemark must be white.


  • Composed in no more than four colours
  • Minimum value: 3%
  • Maximum value: 100%


  • Minimum width: 0.2 mm
  • Frame width thinner than 1 mm has to be made in one solid color.

Required documents

  • CD or MO disk
  • If special effects are designed, the construction layers must appear on the file.

Sample Colour Proof

  • If special colours are used, Pantone numbers must be specified and/or sample bag has to be attached

Product dimensions

  • The bag size must be specified and the position of the artwork on the bag indicated


Quality control

The following key areas are monitored for quality control:

  • Print
  • Lamination
  • Slitting/rewinding
  • Bag forming
  • Finishing


  • Test surface wetting tension of base films
  • Print registration
  • Ink cementing strength
  • Film elongation and shrinkage
  • Solvent residue
  • Inks from DIC of Japan


  • Test surface wetting tension of base films
  • Adhesion strength
  • Film elongation and shrinkage due to lamination
  • Laminate solvent residual


  • Adhesion strength
  • Elongation
  • Heat sealing strength
  • Coefficient of friction

Bag making/finishing

  • Length
  • Width
  • Adhesion strength
  • Heat seal strength
  • Coefficient of friction
  • Vacuum test
  • Boiling test
  • Pressure test


  • Oxygen transmission rate (OTR). Via SGS.
  • Water vapour transmission rate (WVTR). Via SGS.