Poor Ink Coverage

Plate impression is insufficient

Increase plate to substrate impression

Ink film is too thin for substrate characteristics i.e. too rough or porous

Increase ink film thickness by:

  1. Raising ink viscosity
  2. Decreasing metering of anilox roll, increasing anilox roll volume or reformulating ink for substrate

Printing plate is too hard

Use plates with a softer durometer

Substrate surface resists ink wetting and lay

Consult with local Sun Chemical Representative for additives

Ink is drying too fast

Slow drying with glycol or increase machine speed

Ink pH is too low

Check and adjust pH (non-pH stable inks only)