The Future of

Offset Printing

March 20th 2004

HEVEA

ENGINEERS (P

) Ltd

www.heveaengineers.com

Welcomes You

German Perfection, Indian Prices

World’s First Cyberoller shop:

HEVEA

ENGINEERS (P

) Ltd

Faster => Delivery

Higher => Resilience

Stronger => Formula for long life

German Perfection, Indian Prices

HEVEA ENGINEERS PVT LTD

MANUFATURERS OF PRINTING

RUBBER ROLLERS IN TECHNICAL

CO-OPERATION WITH

GUMMIWERK KRAIBURG, GERMANY

The HEART of the PRINTING MACHINE

IS The RUBBER ROLLER

WHY PRINTING ROLLERS ARE CRITICAL TO PRINTING QUALITY

Printing quality depends on:

• the quality of paper

• the quality of ink

• the quality of rubber rollers

TYPES OF ROLLERS FOR PRINTING

• Letter Press

• Offset Inking

• Offset Damping

• Lamination

• Flexo

• Gravure

• Metal Print

• Food Grade

OFFSET PRINTING ROLLERS

Conventional Dampening Rollers

Alcohol Dampening Rollers

Offset Printing Rollers classified into

Ink Form Rollers Ink Distributor RollersDampening Rollers

Sheet fed Offset rubber rollers

• Damping – Conventional – Bareback with fount– Bareback alcohol

Duct

Forme

•Inking – Forme - Distributor

IMPORTANT PROPERTIES

• Hardness - from 25 to 100

• Resilience- To spring back to its original shape after being subjected to pressure

• Evenness - To maintain an even supply of ink

• Chemical Resistance- Resistant to ink, fountain solutions, and cleaning agents.

• Dimensional stability-Roller needs to remain in proper shape and size even after use

RESILIENCE- critical for inking roller

Resilience is elasticity or spring effectHigher resilience means lower pressure setting

Lower pressure setting means

•Less friction and wear out of plate•Less heat generated and longer life for roller

Damping rollers required properties

Must be inert in aqueous media

Must have high affinity for water

- Low surface tension for rubber compound

Bareback damping forme roller perfectly even

Alcohol damping – high resistance to alcohol

ROLLER CARE

• 1. Have Spare set to avoid downtime of your expensive machines.

• 2. Store the rollers in a cool place

• 3. Keep Rollers in a storage rack or the packing box

• 4. Handle Carefully- Avoid contact with sharp edges

• 5. Ensure bearings are in good condition

• 6. Cleaning the roller

CLEANING THE ROLLER

• Ink should not be allowed to dry on the roller

• When machine stops clean roller with a two step wash.

• Clean roller should have a dull velvet finish of a new roller.

Slash Overall Cost

Slash your Overall cost using our rollers

Our Proud Customers

The Hindu Lokvani Hallmark

Thomson Proteck

Time of India Shakthi Udyog

Next

TROUBLE SHOOTING OFFSET ROLLER PROBLEMS

PROBLEMS CAUSE SOLUTION  

DUE TO ROLLERS OTHER THAN ROLLERS

SCUMMINGDIRTY OR GREASY DAMPENING ROLLER IMPROPER INK WATER

BALANCE WASH THE ROLLERS THOROUGHLY.IF WORN REGRIND OR REPLACE DEFECTIVE ROLLERSPLATE SURFACE

SCRATCHED

SMALL HARD PARTICLES EMBEDDED IN THE ROLLER

FOREIGN MATTER ON BLANKET OR IN INK

HORIZONTAL STREAK GLAZED INKING FORME ROLLERSFORME ROLLER SET TOO TIGHTLY AGAINST PLATE

RESET IFR TO PROPER PRESSURE AGAINST PLATE

SCUM STREAKS ACROSS PLATE

GLAZED INKING FORME ROLLERSDAMPENING ROLLERS SET TOO TIGHTLY AGAINST THE PLATE

RESET AT PROPER PRESSURE

UNEVEN STRIP DURING STRIP TEST

ROLLERS UNEVEN ACROSS DIA    GRIND OR REPLACE

INK FLOW IN FINE DROPLETS OR FILAMENTS

ROLLERS IN POOR CONDITION INCORRECTLY SET ROLLERSRESET CORRECTLY OR REPLACE

INK FEEDS IN PATCHES

GLAZED ROLLERS,LOW SPOTS, BENTSPINDLE

TOO MUCH DAMPING SOLUTION OR GUM BLANKET CONTAMINATED PAPER   

REMOVE THE GLAZE WITH A STEP WASH UP SOLUTION

GHOSTING GLAZED OR HARD ROLLERS POOR INK AFFINITY CHECK, REGRIND OR REPLACE IF HARDNESS IS ABOVE 40

NON UNIFORM PRINTING ROLLERS IN POOR CONDITION IMPROPERLY SET IFRCHECK THE CONDITION AND RESET IFR

INK REPELLING SPECKS OR DOTS

FOREIGN PARTICLE PRESENT IN THE PITTED ROLLER

PRESENCE OF PAPER FIBRE, FOREIGN MATTER ON THE PLATE        

RECONDITION ROLLER   CLEAN THE  PLATES

HEVEA

ENGINEERS (P

) Ltd

Faster => Delivery

Higher => Resilience

Stronger => Formula for long life

German Perfection, Indian Prices

HEVEA

ENGINEERS (P

) Ltd

Faster => Delivery

German Perfection, Indian Prices

HEVEA

ENGINEERS (P

) Ltd

Higher => Resilience

German Perfection, Indian Prices

HEVEA

ENGINEERS (P

) Ltd

Stronger => Formula for long life

German Perfection, Indian Prices

It is soft and prone to damage

Nice to feel but will crack easily

Have to maintain it properly…

Printing Roller is like your wife

Treat her well

Your Home is happy

Your roller will give hours

of trouble free and quality printing

HEVEA

ENGINEERS (P

) Ltd

Thanks for coming

World’s First Cyberoller shop:

www.heveaengineers.com

German Perfection, Indian Prices