Technical guidance GRAPHIC CHEMICALS

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Technical guidanceDeionised water + P-58Conductivity 260µS/cmHardness 7 o dHTap waterConductivity 260µS/cmHardness 7 o dHP-43IPA 44Conc. P-55 66without 10% without 10%pH Conductivity pH Conductivity pH Conductivity pH Conductivity2% 4,90 973 4,97 698 5,10 923 5,20 6803% 4,89 1358 4,95 983 4,96 1354 5,08 9784% 4,87 1719 4,94 1258 4,92 1588 5,02 1202P-55R EKO BUFFER-R For sheet fed and web offset printingIt is a universal additive used for fountain preparation. It can be used in web (P-55R) and sheet (P-55) offsetprinting. To prepare the solution, around 1 to 3% of P-55 is added, depending on a suitable pH and waterhardness.In alcohol dampening printing presses it reduces demand for alcohol by more than 50%.Compared to other traditional buffers it is safe for people because it contains low percentage of vaporized organicelements, it is environmentally friendly, safe and biodegradable.It is also anti-corrosive thus preventing the corrosion of plates and metal cylinders in the printing press. It alsocontains the inhibitor which prevents algae and fungi growing in the dampening system.P-56 ALCOHOL BUFFER is used in alcohol dampening printing presses for all types of offset plates. It is appliedtogether with P-43 Prepared Isopropyl Alcohol. Usually dosing is performed automatically, at the beginningsolution is prepared manually. Taking into consideration the water hardness 10 to 20% of P-43 and 2 to 3% of P-56 is added to water.ANTITONING CHEMICALSThey are used for additional hydrophylization of non-printing elements on the offset printing plates and to preventtoning during printing.P-15 PLATE ETC – for preventing and elimination of toning during printingP-72 ANTITON-P – for neutralization of developer remains from the plate andto prevent toningP-15 PLATE ETCH is used for preventing plate toning in the machine.P-15 can be diluted with water in the ratio 1:1. During application, the printing elements have to be coated withprinting ink otherwise plate blinding can occur.Instruction for use: Coat the plate in the machine with a thin layer of the P-15, rinse with water after a minute andproceed with printing.P-72 ANTITON-P is used to neutralize the remaining alkaline developer after the developing is done. It also actspreventively towards the occurrence of toning during printing.Instruction for use: Pour P-72 over the plate, let it work for half or one minute and rinse the plate well with water.Too long action may cause plate blinding.CLEANERS6/6
Technical guidanceWhen using cleaners, special attention has to be paid to rubber rollers and offset blankets of the printing press.Cleaning with improper agents can cause changes in their flexibility and on their surface. Special gloss caused bycertain chemicals, like solutions for gumming, wetting and ink residues may cause weaker distribution andtransfer, or even rubber cracking.In addition to regular everyday cleaning, a thorough deep cleaning of rollers has to be done occasionally to openthe pores and to remove the remaining ink. This makes the surface smooth and flexible again, providing highquality print.Regular cleaning can prolong the life of rollers and rubbers. Stoppages during printing caused due to the changeof the printing ink, especially when changing from dark to light tones, are much shorter, which also reduces thecost of printing and improves the quality.P-21 WASH - for ink rollers and blanketsP-23 WASH AII – for ink rollers and blankets and printing platesP-24 WASH AIII – for ink rollers and blankets and printing platesP-25 UV CLEANER-UV – ink cleanerP-26 ULTRA WASH AIII – universal cleaner for UV, hybrid and conventional inksP-202 WASH-VV – dampening rollers washP-21 WASH is universal cleaner for cleaning ink rollers and rubber gums. Pour P-21 over the ink rollers. When inksoftens, set the wiper to remove it while the rollers are rotating. Repeat the procedure until the rollers are totallyclean.When cleaning rubber blankets, apply the solution with a soft cloth across the entire surface and wipe it off with aclean cloth after some time. P-21 is also suitable for automatic processor cleaning of rubber blankets.P-23 WASH AII is highly effective with great capability of dissolving ink. Cleaner can be mixed with water or it canbe used by itself. When mixed with water the stable solution is formed, which quickly removes ink gum glaze,paper fibers and other impurities – we recommend 30% of water. P-23 is very economical, fast drying cleaner; ithas a flash point above 43 ° C (AII group). P-23 contains corrosive inhibitors, which prevents the corrosion ofmetal parts of the printing presses.P-24 WASH AIII is cleaner with high power of cleaning. It is suitable for automatic washing systems and formanual cleaning. It is the answer for demands of all modern printing machines. P-24 has lower point ofinflammability. It belong to AIII group (flash point above 58° C), therefore it gives safer working conditions anddoes not have any special strict demands for storage and transport.P-24 does not have unpleasant odor. It can be used as itself or it can be mixed with water (recommended 30% ofwater). Mixing with water it forms white stable emulsion, which has very effective cleaning properties: it cleansrubbers, plates and rollers. At the same time it cleans ink, paper fibers and other impurities. P-24 containscorrosive inhibitors, which prevents the corrosion of metal parts of the printing presses.Cleaning the printing platesP-23 or P-24 pour on the soft sponge and wash the plate. After that rinse the plate with water and dry it with wetclean sponge. P-23 and P-24 do not grease and do not injure the printing elements. For cleaning the plates theemulsion can be used, which is made by adding 30% of water to P-23 or P-24.Cleaning the ink rollersFor cleaning ink rollers we recommend using P-23 or P-24 without adding any water. The cleaning should bedone on ink rollers while running. Pour P-23 or P-24 on the ink rollers. When ink softens, set the wiper to removeit while the rollers are rotating. Repeat the procedure (if needed) until the rollers are totally clean. At the end therollers sprinkle with water in order to eliminate paper fibers, and then dry the rollers. For best results werecommend adding up to 20% of water into cleaner.Cleaning the dampening rollers7/6
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Technical guidance GRAPHIC CHEMICALS

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