Kraft rewards artwork that is planned for a darker, warmer substrate. A colour that looks clean on a calibrated screen or white proof can become duller, darker or warmer once printed directly onto brown stock.
Dark Ink Has an Advantage
Black, deep green, navy, burgundy and other stronger colours normally retain clearer contrast because they are already substantially darker than the kraft base.
Small, low-contrast typography can also lose clarity against natural fibre, so simplification often works better than extra decoration.
The packaging design workflow explains why material should be fixed before final artwork, because coated white paperboard and uncoated kraft do not reproduce the same file in the same way.
White Needs a Plan
White is not created by leaving the kraft unprinted. Unprinted areas remain brown.
If the design needs a white logo, pale illustration or brighter colour sitting over an opaque light base, that requirement has to be built into the print specification. It can change production method, artwork separation and cost.
Do not add white simply because kraft feels too dark after the design is finished. Decide whether the contrast is essential at the beginning.
Photography Needs Testing
Detailed photography and subtle gradients are less forgiving on kraft than strong graphic artwork. Natural stock can mute highlights and alter skin tones, product colours or fine tonal changes.
If photographic accuracy is central to the sleeve, compare kraft against a white or coated stock rather than forcing the material choice. The kraft appearance should earn its place.