Picking

Ink is drying too slowly

Add faster drying solvent

Oven temperature is not high enough

Increase heat and air velocity

Ink viscosity is too high

Reduce ink viscosity with thinned extender varnish or solvent

Idler rolls are dirty or tacky

Clean idler rolls and/or wrap with a non stick material such as Teflon

Web is rewound too warm

Reduce chill roll temperature

Re-work is “worn out”, resin balance is poor

Re-make ink or refresh in sump