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Problem: Printed Sheets show color variation from sheet to sheet during the run. Ink film densities are very unstable.
Causes: Low ink level in the fountain Improper roller setting Ink Emulsification Ink backing away from the "fountain" roller Roller Stripping Contaminated ink fountain – dust, grit, etc.
Solutions: Keep ink fountain full to maintain head pressure Reset rollers Decrease water or add heavy body varnish Agitate ink in the fountain or increase ink flow Deglaze the rollers Remove ink, clean fountain, replace with fresh ink

Ink Drying on the Rollers
Problem: Ink is drying on the press rollers
Causes: Excessive Drier in the Ink Light – Take off of ink Roller Pressure is too great, thus creating too much heat Fast drying varnishes in the ink
Solutions: Add Anti-oxidant to retard the drying Reduce ink strength to carry more ink Adjust rollers to minimum pressure necessary to properly transfer ink Add Alkyd varnish to the ink (increases flow –holdout)

Print Mottling
Problem: Print Density is Uneven
Causes: Too much impression Too much ink being carried Low viscosity ink may look mottled on papers with uneven holdout On some stocks, transparent inks will show more mottle
Solutions: Check Blanket Impression and plate to blanket pressure Run a stronger ink to permit a thinner film Higher viscosity ink will have less absorption and reduce mottle Use a more Opaque ink

Excessive Plate Wear
Problem: Image areas of the plate begin to disappear
Causes: Ink too strong for long runs Fountain Solution is too Acidic Plate to Blanket packing is too high Ink may have a poor grind Plate exposure may be too short or too long Abrasive paper particles Ink emulsification and poor transfer mistaken for plate wear The form roller is too tight against the plate
Solutions: Reduce ink strength and carry more ink Increase fountain solution pH Check plate and blanket packing Check Ink Grind Change to a new and properly developed plate Change paper if possible See remedy for ink emulsification Check form roller setting

Ink Trapping
Problem: Poor Trap or Overlay between the colors during process printing (wet trapping)
Causes: Not enough tack difference between colors Second down color is stronger than the first down color Too much water and ink combination Improper ink film thickness on the rollers Paper has too much holdout
Solutions: Increase the tack and viscosity of the first down color Strengthen the first down color or weaken the second down color Reduce the amount of water and/or ink Try a more quick-setting ink
Welcome to our technical tips department. Please continue to visit on a regular basis as we add to this knowledge base.
12/16/04 - Basic Ink & Drying Information for UV Finishing
Oil Based Inks Colors Oil Based Inks Blacks Rubber Based & Acrylics Colors
Quickson Pro Quickson Plus Quickson Pantone Series and Mixes Quickson Multifresh Quickson Signature CML – Oil Base Sonaprint Sonagloss Quickson Pro Quickson Plus Quickson Pantone Series and Mixes Quickson Multifresh Quickson Signature CML – Oil Base Sonaprint Sonagloss Rubber Base Plus Infinity
Rubber Based & Acrylics Blacks Hard Dry Oxidizing Inks Colors Hard Dry Oxidizing Inks Blacks
Rubber Base Plus Infinity Tough Tex Tough Tex LR Tough Tex Tough Tex LR
Waterless Inks Colors Waterless Inks Blacks UV Inks Colors
Sonadry Sonadry DI Sonadry ANK Sonadry Sonadry DI Sonadry ANK Sonacure – Paper Series Sonacure – Hybrid Series Sonacure – Foil Series
UV Inks – Blacks Metallic Inks Specialty Blacks
Sonacure – Paper Series Sonacure – Hybrid Series Sonacure – Foil Series Unipak Golds Unipak Silvers Magnetic Black Mega-Magic Black
Fluorescent Inks Digital Duplicator Inks Overprint Varnishes
Fluorescents Digi-Ink Colors Digi-Ink Black Gloss - Wax Free Gloss Satin - Wax Free Satin Matte - Wax Free Matte
Web Forms & Jet Press Ink Additives & Supplies
Rotason Colors Rotason Blacks All Purpose Fountain Anti-skin Aero Anti-skin Pump Aqua Varnish Blanket Fix Body Builder Varnish Easy Street Fan Apart Adhesive Liquid Cobalt Drier Multi-Drier Padding Comp Quick Rapid One Step Smooth Lith SonaTack Special Binding Additive Tack Reducer Three Way Drier Ultra Gls OP Varnish Hi Rub-Hard Dry Combo Drier Fountain Stimulator

Size of sheet in inches:

Percentage of Coverage:


Ink Estimation for the Complete Job (in pounds):