This Article is About
hard water
Rollers In Offset Printing
Join 1000's of Authors at StreetArticles Today!

Rollers In Offset Printing

Synthetic rubber is used in roller creation: a complex mixture of organic

rubber and several chemicals that obtain their strength and

resiliency through the vulcanization procedure. It is the raw rubber that

adds the rubbery material its necessary qualities. The vulcanization

agents are added to this for the upcoming vulcanization process.

Plasticizers (liquid oils) play a major role as they – in addition to the extenders

and the vulcanization agents – determine the upcoming degree of hardness

of the material. The more plasticizers are added, the softer the rubber after

the vulcanization method.

Shore Hardness

The Shore hardness of a roller identified with a Shore meter

designates the resistance towards penetration of a needle using the

form of either a conic section (Shore A) or a point (Shore D),

pressed with a defined force (1 kp) for a period of three seconds

on the rubber surface. Soft rollers are measured with Shore A,

and hard rollers with Shore D. Inking rollers are required to be adjusted

to be oil-friendly (or oleophilic). In an inking system having conventional inks,

rollers of Shore A hardness in between 30 and 35 are used.

For UV inks, rollers with Shore A hardness of 25 and between 40 and 45 are used.

• Dampening rollers should be water-friendly (hydrophilic). For alcohol

dampening systems, Shore A hardness of between 25 and 30 is suitable.

In direct dampening systems, hard rubber rollers are employed.

Roller Protection

For washing the rollers it is recommended:

1. Use a water miscible wash to get rid of the top layer of solvent-soluble and water-soluble particles that came from the nap of the roller.

2. Apply a non-grit roller paste to take out the insoluble particles.

3. In the end, wash a second time with a water-miscible wash to eliminate the remaining soluble particles.


Over time, rollers pick up particles from the ink, the paper coating and the

dampening agent which block their pores. This contamination ends in a

smooth shiny surface. Inappropriate detergents and hard water contribute

to this effect. Transport of ink and dampening solution is noticeably inhibited

because of this.

Problems with irregular rollers

-A worn out roller, a roller with damaged bearings, rollers set with too much pressure or, a roller that has not been adequately cleaned, can cause:

* color inconsistency

* poor solids, or mottling

* streaks

* muddy print

* extreme dot gain

Apart from the obvious expenses of poor print quality, as well as wasted paper and ink, bad or improperly maintained rollers could cause excessive press downtime, raised running costs, and shorter roller life.

Storing of rollers

If possible, do not expose rollers to direct natural or artificial light.

• The special paper that the rollers come served in prevents light


and therefore helps keep the rubber’s qualities.

Because of this, do not remove the paper before applying the roller in the

printing press.

• Always enter the roller with its pivots on a structure support: Installing it

down right onto the rubber can result in permanent deformations

(pressure marks).

• Keep rubber rollers in a cool and dry place.

• Within specific situations ozone leads to microscopic scratches on

the rubber surface. Due to this don't store rollers closer to

motors or other electrical gadgets.

Street Talk


Sorry! I got sort of lost at the begging, maybe it was too technical for me to handle!

  about 1 decade ago
You May Also Like
Manageartworks Viewer Capabilities – Part 4
Barcode Verification ManageArtworks recognises the following Barcode types: 1. 1D Barcodes a) Code39 b) EAN8 c) EAN13 d) Code128 e) UPCA f) UPCE g) RSSLimited h) Pharmacode i) MSI 2. 2D Barcodes a) QR b) MicroQR c) Aztec d) DataMatrix e) MaxiCode The system not only recognises the barcode, but…
By: Vilva Natarajan in  Business  >  Management   Jun 04, 2016  
  Likes: 0

Manageartworks Viewer Capabilities – Part 3
Checklist The system supports a checklist that can be used across all types of artworks. The checklist is managed and controlled by the admin user. The checklist is configured to include items that each reviewer needs to check and categorized by department, by component type, by category and by market.…
By: Vilva Natarajan in  Business  >  Management   Jun 04, 2016  
  Likes: 0

Team Building Activities for Small Teams
Just because you have a small team doesn’t mean that team building activities need not be necessary. Because small teams work so closely with each other, it means that they have to work harder to achieve synergy in order to effectively work with one another. We are listing down some…
By: Leatrice Rose in  Business  >  Management   May 30, 2016  
  Likes: 0

See Lean Live And Up Close; Lean Japan Factory Tours
Seeing believes and many have journeyed to Japan to see how the Lean Management System works in a real world environment.| Enna has been scheduling tours to Japan to study Lean methods and concepts for years, and some of the largest companies in the world have used their tours to…
By: John Robert1 in  Business  >  Management   May 30, 2016  
  Likes: 0

The Top Challenges Entrepreneurs Face And How to Overcome Them
As a group, entrepreneurs face common challenges. Fortunately, they also share personal traits that can help them overcome these challenges with skill and confidence. This is the consensus of Professor Ed Hess, who studied 54 entrepreneurial companies in 23 states across the country to write, Growing an Entrepreneurial Business: Concepts…
By: Jeff Evans1 in  Business  >  Management   May 28, 2016  
  Likes: 0

Leadership Qualities: How Consistent is Your Behavior?
A good leader can set the tone for an entire project, or even a whole business. Their behavior sets expectations and standards for the rest of the team. As a leader, maintaining awareness of your behavior and ensuring that it stays consistent helps to stabilize the work and goals of…
By: Jeff Evans1 in  Business  >  Management   May 28, 2016  
  Likes: 0

5 Steps To Better Relationships With Your Subordinates
How can you make your business team more productive? Today's employees aren't drones stuck in cubicles like a Dilbert cartoon. Your subordinates live in a social media world and expect personal engagement. Here are 5 ways to better relationships with your subordinates: Know Yourself The first step is to connect…
By: Jeff Evans1 in  Business  >  Management   May 28, 2016  
  Likes: 0

Manageartworks Viewer Capabilities – Part 2
Pan, Zoom & Rotate The PDF File can be rotated (clockwise and anti-clockwise, in multiples of 90 degrees). The viewer also has options to Zoom, Fit to Page and to Pan across the artwork. Measure Dimensions Carton and Label dimensions are critical information that needs to be done right before…
By: Vilva Natarajan in  Business  >  Management   May 28, 2016  
  Likes: 0

Manageartworks Viewer Capabilities – Part 1
ManageArtworks comes with a powerful HTML5 viewer that is integrated with the Workflow and Asset Library. The purpose of this viewer is to 1. View PDF Files on the browser without depending on Java, ActiveX or Flash components 2. Make online collaboration and reviewing quick and easy for all stakeholders…
By: Vilva Natarajan in  Business  >  Management   May 28, 2016  
  Likes: 0

Supreme Material Handling Products
Roto Moulded Products Supreme offers a range of Roto moulded Material Handling products, be it Crates, Pallets, Bins or for Garbage Handling Dust bins. Made in most technologically advanced setup at India’s largest Plastics Processing Unit. Supreme Roto moulded products offer- • Freedom from standard specifications. • Very heavy duty…
By: tirupati in  Business  >  Management   May 24, 2016  
  Likes: 0

Learning Management System for Lean & Kaizen - Improving the Effectiveness Of Lean Systems
Hundreds of businesses and organizations each year choose to implement a Lean Management system to help: Improve productivity and efficiency Eliminate waste of time, materials and effort Reduce costs Increase profits The Lean System is a series of methodologies, techniques and procedures that not only time tested by nearly half…
By: John Robert1 in  Business  >  Management   May 09, 2016  
  Likes: 0

Kaizen Management Coordination Online Courses Are Available From Uttana
One of the keys to keeping your Lean systems running smoothly is to be continually investing in your workforce by means of: Ongoing training courses: Uttana has a full list of training courses that can supplement and reinforce the training your staff has already had. Introducing new Lean Initiatives:No matter…
By: John Robert1 in  Business  >  Management   May 06, 2016  
  Likes: 0

Lean Kanban Training Courses Help to Revolutionize Your Supply Chain
No matter what your company does or how you make your money, one thing every business has in common is the need for supplies. Manufacturing, IT, Financial, Logistics, Research and Development, Health Care and Education, all need a source of supplies that arrive in good condition on a timely basis.…
By: John Robert1 in  Business  >  Management   Apr 27, 2016  
  Likes: 0

Fun, Learn, Camaraderie And Much More
(Writes Sahil Guglani from Batch 2015-17 about the International Immersion Program at FORE School of Management, New Delhi held in association with Nanyang University Singapore) MBA is not just a course work, it is a rigorous 2 year training program that not just makes a professional out of a student…
By: DebriN Synergy in  Business  >  Management   Apr 17, 2016  
  Likes: 0

Tech Support Call Center Services Provide Cost - effective And Accurate Solutions
Summary: Making use of the Tech Support Call Center becoming increasingly popular as they have the necessary setup as well as the technical expertise that can deal with issues fast and accurately. Customer service plays perhaps the primary role in augmenting businesses. There is no industry or service that can…
By: felixrox in  Business  >  Management   Apr 16, 2016  
  Likes: 0

Article Views: 2463    Report this Article