Washboard Print

Consistent variations appear in the caliper of corrugated substrate, corresponding with the flute profile

Use a sheet that does not have washboarding / fluting

Plate impression is incorrect

Adjust plate to substrate impression

Substrate surface finish resists ink wetting and laydown

Consult with local Sun Chemical Representative for additives

Ink film is too thick for high hold out substrates

Reduce ink film thickness or use a more porous substrate

Ink film is too thin for stock and the flute tip to flute valley caliper variation

Improve corrugation process. Increase ink film thickness.Change ink formulation for more transfer

Ink viscosity is too low

Raise viscosity by adding fresh ink

Ink formulation is incorrect

Consult with local Sun Chemical Representative