1 General Information1.1 IntroductionThe first chapter introduces the structure of this Operation Manual.Please note that this Operation Manual is based upon data which was current at the time it was published and that can be changed at any time without prior notification. YIWU LINKAGE MACHINERY CO., LTD retains the right to modify the systems without prior notification and provides no warranty of any kind for machines refurbished by other companies, previously supplied by the YIWU LINKAGE MACHINERY CO., LTD.Carefully read the 0peration Manual before switching on and operating the machine.The 0peration Manual will help you in becoming familiar with the machine and its proper use.This Manual contains important information on operating the machine safely, properly and economically.Carefully following the instructions will help you to avoid risk and increases the reliability and life time of the machine.This Operation Manual must be complemented with the local and the customers’ safety instructions.In addition the current national regulations on accident prevention and protection of the environment must be complied with.The Manual must be kept permanently on the machine site.Every person entrusted to work with the machine must read this Operation Manual and follow its instructions.The machine must be operated only by trained personnel.The machine must be maintained only by professionally skilled personnel.2 Before Operation2.1 Basic principleUse for intended purpose onlyThe machine is designed exclusively for processing paper.Use of the machine for any other purpose whatsoever constitutes improper use. YIWU LINKAGE MACHINERY CO., LTD accepts no responsibility for any damage resulting from such improper use. The risk resides with the user.The machine must only be used when in good working order, with due regard to the purpose for which it was designed, the safety and risk aspects and observing the Operation Manual! Any malfunction must be corrected immediately, in particular any that could affect safety.Proper use is understood to include compliance with the safety regulations in the Operation Manual and adherence to the maintenance and service conditions.2.2 Warranty noteNot using the suggested parts from YIWU LINKAGE MACHINERY CO., LTD may lead to damage and impaired operation. The warranty covering the complete machine and its operation does not apply if:· Non-genuine parts are used· Original parts are altered or the machine tampered without the approval of YIWU LINKAGE MACHINERY CO., LTD· The machine is not operated, cared for or maintained properlyWearing parts are not covered by the warranty.2.3 Organizational measuresThe Operation Manual must be kept permanently at the machine site in a designated place, ready to hand.In addition to the Operation Manual, the local general statutory and other binding regulations governing accident prevention and environmental protection are to be observed!Such regulations can for example refer to the handling of hazardous substances or the provision and/or wearing of personal protection clothing.organization, work procedures, and personnel delegation, are to be kept together with the Operation Manual.Personnel delegated to operate the machine must have read and fully understood the Operating Manual, particularly the chapter on safety, before starting work.Whilst the machine is in operation, the safety instructions must be observed. This applies in particular to personnel who only work on the machine occasionally e.g. for setting up and maintenance.3 Machine data3.1 Technical specificationsMachine No. LD-1020 production line of roller paper high speedflexography saddle stitchMachine type Printing packing machineSet up for format 4 pockets4-pockets production max. 12,000 book/hourmax. 960 mmReel widthmax. 580 mmReel diameter max. 1.500 mmReel weight max.max. 670 mmPrinting length（cylinder circumference）max. 300 mmCut of length for cross-cutter（unfolded）max. 500 mmmax. 300 mmNumber of cuts/ cross-cutter max. 720cut/minProgression 5 mmNumber of sheetsmax. 50 sheetmax. 5 sheetLayer thickness (unfolded) max. 5 mmOperating speed max. 220 m/minOperating cycle max. 50 cycle/min3.2 Machine overview01 Unwind Station03 Cross Cutter04 Overlapping Station05 Counting and Collecting06 Cover Infeeder07 Stitching Station08 Folding Station09 Spine Pressing Station10 Cutting and Trimming4 Machine Control and Control Panels4.1 Touch Screen-Display: Start screenPosition Function1 Key switch for set-up modeMachine can only be driven in inch mode from the portable control panel2 Select language3 Start touch screen displays for machine status and value changesFor information: To return to the start windows, press on the upper left side of the screen4.2 Touch Screen-Display: Main menuPosition Function1 Indication of the operating status2 Indication of paper web speed3 Press one of the fields to access a submenua: operating settingsb: check all of the lamps on the machinec: fault messag e→you can have the fault messages displayed hereFor information:To return to the start windows, press on the upper left side of the screen4.3 Touch Screen-Display: Operating settingsPosition Function1a Entering the maximum machine accelerationUse the ‘faster’ and ‘on’ keys to adjust the machine to the set speed. Touching the key calls uponentry field. Enter the machine speed in this field.1b Entering the minimum machine speed (auto ramp). Use the ‘slower’ and ‘on’ keys to adjust the machine to the set speed. Touching the key calls up an entry field. Enter the machine speed in thisfield.2 Suction for cross-cutter ON/OFF3 Web monitoring ON/OFF4 Stitching ON/OFF5 Stitching Set-up operation ON/OFF6 Suction for cutting station ON/OFF7 Enter the book count for the pile. When touching the field, a numeric key pad comes up.8 Counter stacker. Reset the space.4.4 Touch Screen-Display: fault message (1)Position FunctionThis window is only displayed when a machine fault occurs or when the ‘fault message’ key ispressed1 This icon appears on all screens and indicates what program menu level the operator is on2 Display of fault numbers and fault messages-to view more information about the fault, press the row directlyCaution:All fault messages are automatically deleted after a disturbance is eliminated4.5 Touch Screen-Display: fault message (2)Position Function1 Display of fault numbers and fault messages2 Location of faults on the main machine3 Recommendation for eliminating a disturbanceThe numbers indicate the operating equipment code part4 Change back to previous display ‘fault’4.6 Machine ON/OFF: Standard control panelPosition Function1 EMERGENCY STOPUse only in emergency situations2 Inching MODE3 STOP MACHINEExecutes a controlled run down of the machine (soft stop)4 INCREASE MACHINE SPEED5 REDUCE MACHINE SPEED6 START MACHINEProcedure: First press the warning button (7) then, within 10 seconds, press the inching key (2)and the start key (6) simultaneously7 WARNINGHaving started the machine up, run the main motor at low speed and check the web guide rollers and the tape tracks.The machine cannot be switched on until the button ‘warning’ (7) 1 to 3 seconds is pressed on any of the standard control panels. After a delay of 3 seconds independent from the warning time, the machine is set in motion by pressing both keys ‘start’ (6) and ‘jog’ (2) together.If this is not done within a release period of 10 second, the procedure must be restarted from the beginning with ‘Warning’, ‘Start’ and ‘Jog’.During the 10 second period, the machine can be jogged as often as required.The release period is restarted each time the button is tapped.The machine can be run up to any speed required using the buttons ‘Faster’ (4) and ‘Slower’ (5)The machine can be stopped normally with the button (3).The Emergency Off switch (1) may only be used:-to stop the running machine in case of emergency-to secure the stationary machine against inadvertent restarting4.7 Unwind stationPosition Function1 Stop MACHINEExecutes a controlled run down of the machine (soft stop)4.8 Printing towerPosition Function1 EMERGENCY STOPUse only in emergency situations.4.9 Air pressure switchPosition Function1 Adjustment of overlapping blast air.2 Main air ON/OFF4.10 Counting and collecting stationPosition Function1 To take off paper stacks:raise/lower the tape track directly behind the transport gripper4.11 Infeeder on the overlapping unitPosition Function1 Switching meter/min2 Infeeder ON/OFF4.12 Infeeder（2）Position Function2 Raise infeeder table3 Lower infeeder table4 Infeeder, Non-Stop-Operation (Option )4.13 Infeeder, blast airPosition Function1 Adjust blast air2 Adjust blast air for separation of paper clips3 Adjust vacuum for suction beltImportant note:For safe cover transport, adjust the vacuum pressure as low as possible4.14 Count stackerPosition Function1 EMERGENCY STOPUse only in emergency situations5 Synchronizing the machine after changing the cut lengthThe synchronization procedure is broken down into the following steps:5.1 Cross cutter1. Cut correction for right-angled cut2. Changing format gear3. Adjusting timing of the cut5.2 Overlapping1. Adjust overlapper fingers to the paper format2. Adjust overlapper carriage to the paper format5.3 Counting and collecting stationSynchronize the counting and collecting station5.4 Printer tower1. Circumferential register adjustment-ruling roller2. Lateral register adjustment-ruling roller3. Alignment of face and back printed image5.5 Cross cutterAdjusting printed image through by fine adjusting the cross-cutter5.6 Transport fingersNext adjust the following sub-assemblies for the new paper format1. Infeeder2. Stitching station3. Folding station5. Trimming station5.1 Cross cutter5.1.1 Correcting for right-angled cut1. Fig 1: Undo the screw (1)2. Adjust the cross-cutter (2) with the hexagonal screw driver3. Continue this correction until 2 cut sheets placed back to back are identical in size4. Secure the setting by lock screw (1)5. Carry out this correction each time the cut length is changed5.1.2 Changing format gear wheel2. Slacken off the belt (3) by turning the eccentr ic (1)3. Remove the three screws (4) and remove the format gear wheel (5)4. Fit the new gear wheel as shown in the gear wheel table5. Tighten the screws6. Tighten the belt (3) by turning the eccentric (1)7. Lock the setting by tightening the screw (2)5.1.3 Adjusting timing of the cut1. Fig 3: release the clamp (1)2. Set the timing of the cut by turning the cross cutter (2) in direction of web movement3. Lock the setting by tightening the clamp (1)LD-1020 OPERATION MANUAL5.2 Overlapping5.2.1 Adjusting overlapping fingers to format1. Fig. 4: release the clamping lever (1) and set the Overlapper carriage to the sheet size with the lever (2)2. Lock the setting by tightening the clamping lever (1)3. Run a cut sheet of paper into the overlapper in inch mode4. Stop the machine!5. Fig.5: Undo the screw (1) on the drive side6. Turn the overlapping shaft by hand until the gap between the leading edge of the following sheet of paper and the overlapper fingers is approx. 5 mm. (see Fig.6).NOTE: The following sheet must not touch the overlapper fingers.7. Lock the setting by tightening the screw (1).5.2.2 Adjusting overlapper carriage to format1. Run a sheet into the overlapper until its trailing edge is depressed by the overlapper fingers.2. Stop the machine!3. Fig. 7: Release the clamping lever (1)4. Adjust the overlapper carriage by turning the lever (2) until the leading edge of the paper is under the centre point of the brake rollers.5. Tighten the clamping lever (1)5.3 Counting and collecting station5.3.1 Synchronizing the counting and collecting station1. Run the machine on, in inch modeStop the machine as soon as the gripper is completely closed.2. Fig.8: Undo the screw (2) and slacken the drive belts (4) using the eccentric (3)3. Undo three screws here (1)4. Run the machine in inch mode until the 1st paper strip is placed on the separator fingers.5. Re-tighten these three screws (1)6. Tighten the drive belts (4) using the eccentric (3) Lock the eccentric by tightening the screw (2)5.4 Print tower5.4.1 Circumferential register adjustment-ruling roller1. Fig.9: Release the clamping lever (1)2. Rotate the ruling roller with the lever (2) until the required printed image is obtained3. Secure the setting with the clamping lever (1)4. The counter-pressure cylinder can be adjusted by a maximum of ±5.0mmNOTE : Mark (3) local in the central5.4.2 If the adjustment range is insufficient1. The following operations must be carried out on operator side and drive side2. “Stop” the machine!3. Fig. 10: Undo the clamping lever (1)4. Undo the screw5. Using the hand grips (3), lift the ruling roller (4) out of the toothed engagement with the counter-pressure cylinder6. Rotate the ruling roller by hand. Rotation per tooth=5.0mm5.4.3 Lateral register adjustment-ruling roller1. Fig.11: slightly loosen the screw (1) on operator side and drive side.2. Adjust the ruling roller (3) sideways using the hand grip (2) until the required printed image is obtainedLD-1020 OPERATION MANUAL 5.4.4 Adjusting the register on first form andperfecting (double-sided web printing)1. Fig.12: Undo the clamping lever (1)2. Using the star grip (2), bring the imagesinto register3. Secure the setting with the clamping lever (1)4. Register adjustment for front and backprinted image is max. ±20mm5.5 Cross cutter5.5.1 Adjusting printed image to cut of thecross-cutter-fine adjustment on the right side1. Fig.13: Release the clamp (1)2. Turn the star-shaped knob (2) until the cutlines up with the ruling as required. Themaximum adjustment range is 25mm.3. Lock the setting by tightening the clamp (1)5.6 Transport fingers1. Inch a paper set on to the conveyor sectionof the machine with the gripper of the countingand collecting station2. Stop the machine!3. Fig.14: The coupling (2) is located on the driveside level with the counting and collecting station4. Remove the screw (3)5. Turn the connection shaft (1) by hand in theedge of the paper set is 20mm away from the transport fingers.6. Fig.14: Replace the screw (3) into the coupling (2) and lightly tighten it.Note:If the tapped hole for the screw (3) is not fully visible in the coupling (2), the coupling must be turned slightly in the direction of machine rotation.6. Basic settings for the machine 6.1 Collecting and counting station1. Fig.1: The cam disks (2 and 3) must line up with the machine hole (1) and the marker hole of the machine side frame.2. Adjustment:-For adjustment use a metal rod (4) with 8mm diameter. Line up the marker hole (1) of cam disk (5) with the marker hole of machine side frame. -Release the clamps of the cam disks (2 and 3) -Line up the cam disks with the marker hole (1) -Push the metal rod (4) through all cam disks. -Tighten the clamps6.2 Stitching station1. Fig.2: Fully raise (top dead centre) the stitching headdrive in inch mode shown in the illustration2. Run the Rotarnock to 003. Fig.3: The cam disks (2 and 3) must line up withmarker hole (1)4. Adjustment:- For adjustment use a metal rod (4) with 8mm diameter - Release the clamps of the cam disks (2 and 3)- Line up the cam disks with the marker hole (1)- Push the metal rod (4) through all cam disks.- Tighten the clamps.6.3 Spine pressing station1. Fig. 4: Fully raise (top dead centre) the stitching headdrive in inch mode shown in the illustration2. Run the Rotarnock to 00LD-1020 OPERATION MANUAL 3. Release the drive shafts on the L side.4. Fig. 5: turn the drive shafts until the cam shaftsline up with t marker hole (3)5. Adjustment:- For adjustment use a metal rod with 8mm diameter- Release the clamps of the cam disks.- Line up the cam disks with the marker hole (3)- Push the metal rod through all cam disks.- Tighten the clamps.6.4 Position of the transport fingers1. Distance of the transport fingers from the edgeof the table plate beneath the stapling heads=370 mm(marker hole). The Rotarnock is now on 00 and lights up2. Adjustment:Fig.6: Run the machine until the Rotarncok lights up.Align the transport fingers with the markerhole (5) using the bolt (4)7. Unwind station7.1 Function descriptionThe objective of the unwind station is to accommodate paper reels and to feed the machine with paper at a preset tension. The paper web tension is kept constant by a system of dancer rollers and a hydraulically controlled brake system. The dancer roller system is accommodated in the print tower. A hydraulically operated brake caliper alters the position of the dancer rollers to regulate the web tension. The length of paper web in the dancer roller system also acts as a paper buffer in the event of the machine being stopped abruptly. The paper reels are held clear of the floor. The lift is effective using a hydraulic hand pump. The paper reels used are wound on cardboard cores. Two clamp heads support the reel. The diameter of the clamp heads is matched to the diameter of the paper reel cores. In order t compensate for the changing delivery angle of the web, a web deflector is arranged behind the dancer roller system in the print tower.7.2Notes on safety1. Risk of crushing!The new paper reels weigh up to 1,000 kg!2. Warning-risk of injury!Even spent reels can weigh up to 20 kg!All personnel authorized to change reels must wear safety shoes!3. When changing reels and drawing the web in by hand,the machine must be stationary and prevented from beinginadvertently switched back on!Press one of the red emergency stop buttons!7.3Residual risks1. Exercise extreme caution! Sharp edges! The edges of the paper web can inflict cuts! Keep well clear of the paperweb! Protect bare parts of the body with protective clothing!2. Exercise extreme caution! Risk of crushing injury! The paper guide rollers can inflict serious injury! Fingerscaught between paper web and guide rollers can be crushed! Never touch the paper web near the guide rollers whilst the machine is running.3. Exercise extreme caution! Risk of injury through crushing and impact. New paper reels should be prepared wellclear of the unwind station! Only splicing should be carried out in the unwind station! Unused and partially used paper reels, remove from the machine, should be prepared for storage well clear of the unwind station.4. Exercise extreme caution! Sharp knives! For paper cutting, only knives with automatically retracting blades mustbe used!5. Exercise extreme caution! Risk of crushing injury! As the space between paper reel and the floor is less than500mm, there is a risk of being crushed!6. Exercise extreme caution! Risk of crushing injury! When running the paper reel in, there is a risk of being crushedbetween the reel and the supports where the gap is less than 500mm!7. Exercise extreme caution! Risk of crushing injury! When loading or unloading paper reels, keep every part of thebody well clear of the chucks and the paper reel!8. Exercise extreme caution! Risk of crushing injury! When lowering the paper reel, always keep every part of thebody clear of the space between the paper reel and the floor! Always wear safety clothing (e.g. protective footwear)!9. Exercise extreme caution! Risk of crushing injury! The dancer roller zone may only be entered when the dancerroller is fully lowered!7.4Preparing and Feeding in the reel1. Fig.1: release the clamping (3) on the R-sideand L-side from machine2. Draw the clamping heads (1) apart to theirextreme limit with the screws (2)3. Centre the paper reel between the two supportarms so that, when mounted, it unwinds clockwise.4. Align the support arms with the centre of the reel:raise the support arms by a pumping action with the lever (4)Lower the support arms by opening the valve (5)5. Release the disk brake.6. Fig.1: Press the clamping heads into the reel core upto the stop, using the screws (2)7. Retighten the clamping lever (3)8. Tighten the clamping heads with the compressedair driver (accessory)Ensure that the clamping heads are not under pressure when tightened!9. Re-apply the disk brake.7.5Adjusting the diverting roller withan unevenly wound paper reel1.Unevenly wound paper reel causes=irregular web tensionResult: creasing and migration of the web from the machine centre 2. Fig.2: Adjust the diverting roller with the star-shaped knob (1)7.6 Compensating for paper curl1. Fig.3: Problems can arise due to curling of the paper,in particular downstream of the cross-cutter, causingproduction faults.2. In order to compensate for this curvature, the de-curlingbar is swung into the paper web.3. Fig.4: Release the clamping lever (1)4. Set the decurling bar into position with the lever (2),until those are appropriate for paper web behind the crosscutter straight on the transport tape.5. Lock the setting by tightening the clamping lever (1).Note: With reducing role diameters must the decurlingbar be readjusted7.7 Changing paper reels1. Fig.5: lower the support arms by opening the valve (1).2. Remove the old paper reel.3. Load the new reel as described at the beginning of this Chapter.4. Tear off both ends of the paper web at right angles.5. Connect the two ends with double-sided adhesive tape.6. Tighten the paper web up to the print tower by rotating the paper reel7. Apply the disk brake8. Allow the paper web to run slowly through the machine until the splices reach the collecting station. From this point onwards, the machine can be run at normal speed.8 Inking units8.1 Fluids (ink and cleaners) and accessories 8.1.1 General notesIf quality print results are to be obtained and premature wear avoided to the rubber rollers supplied and, when fitted, to the ceramic and chrome screen rollers, it is essential that the proper fluids and accessories as specified in the following chapters be used.It is essential that you contact your ink supplier well in advance in order to obtain advice on the selection and use of suitable fluids and accessories.Please make sure that you are in possession of the technical data sheets and notes on their application. Fluids include-Special inks for rubber ruling work, water dilutable -De-foaming agents-Cleaning agents, other thinnersAccessories include -Cleaning cloths-Containers for pouring inks8.1.2 Notes on the use of fluids (warning)Only use inks, cleaning media and other fluids which you have discussed and agreed with your ink supplier. The fluids must be demonstrably suitable for flexo print ruling.Other materials could result in unsatisfactory ruling results and / or damage to the rollers.Across the world, the widest variety of rubber is used. Every type of rubber will age with time; that also applies of course for the rubber rollers supplied. When in use, the surface of the roller changes within the first 4-6 months; it hardens a little, becomes smoother and less sensitive to the action of certain chemicals. For this reason, it cannot simply be assumed that new inks and other accessories that have been introduced on ‘old’ rollers can also be used on new ones.8.1.3 Fluids to be avoidedInks, water, de-foaming agents and other liquids-and most especially cleaners and thinners-must be free of the following chemical substances as their presence could lead to roller damage.a.esters, ketones, aromatic hydro carbonates and aliphatic hydro carbonates (e.g. fuels, grease, white spirit, aromatic solvents,acetone, acetic acid). Constituents in these liquids could cause welling of the rubber rollers. In addition, silicone and grease often prevent clean ink transfer.b.Chlorides. They can be contained both in tap water and in distilled water as well as in inks, in strong concentrations (﹥﹥ppm). Chlorides typically cause crevice corrosion, particularly on chromated anilox rollers.c.The water must not contain any oily substances and solid particles and must be more or less free of chlorine (in the lowerppm range).8.1.4 Types of inkLiquid concentrates are to be preferred as they are easier to handle. It is unlikely that problems will arise with these types of ink.Ink powders have the considerable disadvantage that they must be handled exactly in accordance with the manufacturer’s instructions. Even then, powder inks tend to form crystals; the ink unit and the rollers must be cleaned very often in order to avoid their being damaged. In our opinion, this disadvantage is not outweighed by the price advantage, when compared to liquid concentrates.Alcohol based inks, or inks mixed with alcohol with a flash point of less than 63o C, constitute a fire risk. It is crucial that local regulations and the manufacturer’s instructions in particular be followed faithfully. Warning: alcohol concentration above 10% can attack the plastic material in the inking system.8.1.5 Cleaning clothCloths must be lint-free, absorbent, tear resistant and oil-free. Other types of cloth will cause contamination.8.1.6 Recommendations on fluids and accessoriesInksSupplier: Jaenecke + Schneemann Druckfarben GmbHP.O. Box 3149, 30031 Hanover, GermanyTel: ++49 511 54 710, Fax: ++49 511 54 71 211Ruling ink: Ruling ink Group 14, red, blue, blackAdditional tints are available. The inks are supplied in fluid concentrated form (10/25 kg containers) and can be diluted with water to be strength requiredDe-foaming agent: De-foaming agent, No. 30 32 32Flexo print ink: Flexo print ink and blend Group 5/A in various colorsThe inks are supplied in concentrated form (10/25 kg containers) and can be diluted with water to be strength requiredCleaning agentsSupplier: Printing industry, drug stores, ink suppliersProduct: Chemically pure alcohol for cleaning rollers, the designation is : IPA (i.e. isopropyl alcohol)Product: Clear water or hot soapy water for cleaning the felt scrapers and for washing out the ink units and washing down the rollers.Accessories: Soft, lint-free cloths and clean plastic containersSupplier: Free choice8.1.7 Ink consumptionAs a rough estimate (approx. ±10%), the ink consumption can be calculated from the following (basis: paperweight 70/m2) Consumption of ready made up ink approx: 0.2 ml liquid per 400 m ruleExamples:Squares 5mm: 6L liquid per t paper (both sides), respectively0.2ml liquid per m2 paper (one sided)Rules 10mm: 1.5L liquid per t paper (both sides), respectively0.05ml liquid per m2 paper (one sided)Margin rule A4: 0.07L liquid per 1 paper (both sides)Mixing ratios ink, flexo print ink, water (you will still need to carry out your own tests)Ruling:Red, green: thick print 1 part ruling ink 5 parts watermedium print 1 part ruling ink 10 parts waterthin print 1part ruling ink 20 parts waterBlue, black: thick print 1 part ruling ink 4 parts watermedium print 1 part ruling ink 8 parts waterthin print 1 part ruling ink 20 parts waterCover printing:With ruling ink: thick print 1 part ruling ink 0 part watermedium print 1part ruling ink 1 part waterthin print 1 part ruling ink 2 parts waterwith flexo print ink: thick print 1 part ruling ink 2 parts watermedium print 1 part ruling ink 4 parts waterthin print 1 part ruling ink 7 parts water8.2 Paper8.2.1 Suitability for rulingGood ruling results depend not only on the correct choice of ruling ink and other fluids but also, and most especially, on the properties of the paper being ruled.It should be sufficiently strong, free of dust and smooth, and it must be sufficiently absorbent to take up ink.In Europe as a rule, paper weighing 70g/m2±10g/m28.3 Unpacking, transportation, installation, storage8.3.1 Transporting rollers/ avoiding indentationsWhen fitting or removing the rollers, it is important that the support bolts supplied be used. If transport slings are used, care must be taken to ensure that the rollers are not marked by indentations; severe indentations will not recover.8.3.2 Contact with rubber surfaceOnly permit suitably tolerant fluids to come into contact with the rubber surface.Avoid touching the surfaces with your bare hands; finger prints can leave grease marks which will reduce the quality of ink。
