The Future of Offset Printing March 20 th

The Future of Offset Printing March 20 th 2004

EA V E H E E IN RS E NG (P td L ) World’s First Cyberoller shop: www. heveaengineers. com Welcomes You German Perfection, Indian Prices

EA V E H EN NE I G S R E td L ) (P German Perfection, Indian Prices v Faster => Delivery v Higher => Resilience v Stronger => Formula for long life

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 Offset Printing Rollers classified into Ink Form Rollers Dampening Rollers Conventional Dampening Rollers Ink Distributor Rollers Alcohol Dampening 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 effect Higher 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 v Must be inert in aqueous media v Must have high affinity for water - Low surface tension for rubber compound v Bareback damping forme roller perfectly even v 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 SOLUTION CAUSE DUE TO ROLLERS SCUMMING PLATE SURFACE SCRATCHED HORIZONTAL STREAK DIRTY OR GREASY DAMPENING ROLLER SMALL HARD PARTICLES EMBEDDED IN THE ROLLER FOREIGN MATTER ON BLANKET OR IN INK GLAZED INKING FORME ROLLERS FORME ROLLER SET TOO TIGHTLY AGAINST PLATE RESET IFR TO PROPER PRESSURE AGAINST PLATE DAMPENING ROLLERS SET TOO TIGHTLY AGAINST THE PLATE RESET AT PROPER PRESSURE GRIND OR REPLACE GLAZED INKING FORME ROLLERS UNEVEN STRIP DURING STRIP TEST ROLLERS UNEVEN ACROSS DIA INK FLOW IN FINE DROPLETS OR FILAMENTS ROLLERS IN POOR CONDITION GHOSTING IMPROPER INK WATER BALANCE WASH THE ROLLERS THOROUGHLY. IF WORN REGRIND OR REPLACE DEFECTIVE ROLLERS SCUM STREAKS ACROSS PLATE INK FEEDS IN PATCHES OTHER THAN ROLLERS RESET CORRECTLY OR REPLACE GLAZED ROLLERS, LOW SPOTS, BENT SPINDLE INCORRECTLY SET ROLLERS TOO MUCH DAMPING SOLUTION OR GUM BLANKET CONTAMINATED PAPER REMOVE THE GLAZE WITH A STEP WASH UP SOLUTION GLAZED OR HARD ROLLERS POOR INK AFFINITY CHECK, REGRIND OR REPLACE IF HARDNESS IS ABOVE 40 ROLLERS IN POOR CONDITION IMPROPERLY SET IFR FOREIGN PARTICLE PRESENT IN THE PITTED ROLLER PRESENCE OF PAPER FIBRE, FOREIGN MATTER ON THE PLATE NON UNIFORM PRINTING INK REPELLING SPECKS OR DOTS CHECK THE CONDITION AND RESET IFR RECONDITION ROLLER CLEAN THE PLATES

EA V E H EN NE I G S R E td L ) (P German Perfection, Indian Prices v Faster => Delivery v Higher => Resilience v Stronger => Formula for long life

EA V E H EN NE I G S R E td L ) (P German Perfection, Indian Prices Faster => Delivery

EA V E H EN NE I G S R E td L ) (P German Perfection, Indian Prices Higher => Resilience

EA V E H EN NE I G S R E td L ) (P German Perfection, Indian Prices Stronger => Formula for long life

Printing Roller is like your wife v. It is soft and prone to damage v. Nice to feel but will crack easily v. Have to maintain it properly…

Treat her well v. Your Home is happy v. Your roller will give hours of trouble free and quality printing

EA V E H E E IN RS E NG (P td L ) World’s First Cyberoller shop: www. heveaengineers. com Thanks for coming German Perfection, Indian Prices