press chemistry

Offset printing is still a very complex process. The relationship between ink, paper and fountain solution remains all-important, if one of the links in the chain is broken the end result will be compromised.

Regularly having your press chemistry professionally checked will save you time and money, as well as keeping your pressroom running at the optimum.

Fount Additives

The fount additive has many functions:

  • Controlling the ink/water emulsion
  • Keeping ink out of non-image areas
  • Maintaining a constant pH
  • Desensitising the printing plate
  • Alcohol reduction or replacement
  • Plate wetting
  • Calcium control
  • Lubrication of the plate and blanket
  • Corrosion inhibition
  • Prevention of algae

Using the correct type of fount solution at the correct dosage is critical to achieve and maintain the optimum ink/water balance. Using an unsuitable fount additive or incorrect dosage can result in the following.

  • Drying problems
  • Tinting
  • Picture framing
  • Piling
  • Picking
  • Scumming
  • Plates sensitising and wearing
  • Narrow operating window on damp settings

The technical team at Pressroom Partners have many years of experience on press, dealing with press chemistry set up and maintenance including system cleans, problem solving and troubleshooting.

Setting up the correct chemistry and regular press audits will result in fewer problems.

Please contact us if you have any concerns or are having problems on press, we are here to help.