job specifications production problems that could eventuate by not reading and understanding the job specifications responsible person todiscuss any production problems OHS factors that need to be considered when mounting and proofing flexographic plates most common cause of photopolymer plates crazing on the image side importance of resiliency of the printing plate main advantage of using thin photopolymer plates in process printing faults that may be detected on new plates type of solvents that should be used on photopolymer plates meaning of the term V-block mounting V-block mounting benefits of optical mounting purpose of binding plates after mounting possible print faults that could be eliminated by using cushion mount OHS factors that need to be considered when installing printing cylinders or sleeves precautions that should be taken to ensure that the plates and cylinders or sleeves are not damaged during installation checks to be made to ensure plates and cylinders or sleeves have been installed correctly OHS precautions that must be observed when webbing up the machine positioning of the reel pulling the substrate into the machine result of insufficient unwind tension result of excessive unwind tension function of the "Dancer" roller on a web machine function of the PIV unit result of adjustments to the PIV function of the lay-on roller effect of excessive lay-on roller pressure effect of the web not being spliced correctly workings of the particular web viewing device OHS precautions that must be observed when setting up the delivery control of the web in the rewind unit result of incorrect rewind tension remedial steps that can be taken if there is a possibility of the ink marking in the rewind use of air blast play in the delivery of sheets OHS precautions that must be observed when preparing inks and additives details that are necessary to check an ink's suitability for the printing process special end-use requirements that may be necessary main function of a pigmented extender used in flexographic printing effect of adding plasticisers to flexographic inks other additives use in flexographic inks range in seconds for zahn cup measurements effect foaming has in a zahn cup when measuring the ink viscosity recommended pH range when printing with aqueous inks precautions that you observe to minimise waste when preparing the ink shelf life of most inks conditions that are relevant to the storage of inks and additives conventions that should be adhered to when labelling mixed inks OHS factors that need to be considered when setting up the machine advantage of centring all machine controls checks that should be made on cylinders and gears checks that should be performed prior to cylinder or sleeve installation angle that the chamber blades should be set main advantage of gauging up and dry register prior to printing a job cell count of the anilox roller that is used when printing solids use of water treatment additives in a central impression drum and chill roller coolant system advantages of laser engraved ceramic anilox rollers things relating to the anilox roller that a roller scope will measure reasons for anilox wear type of job that would be printed using a hexagonal cell configuration recommended web temperature when printing polypropylene film method of drying that is used when printing on polythene by the flexographic process drying rate of liquid inks drying of aqueous inks operating range of UV lamps need to graduate the drying speeds of each progressive colour, so that first-down colours dry faster the subsequent colours in flexographic printing,the reasonthe colour strength increases as the press speed increases cause of a decrease in web tension result of increasing rewind tension after the roll has been partially rewound major cause of a telescopic roll print characteristics that are related to excessive printing pressure causes of picking when printing multicoloured work print faults that result from using an over-reduced ink problems that can cause lateral streaks showing up in uneven printing causes of moire patterns when printing by the flexographic process result of air being trapped under mounted plates instrument used to identify retained solvent trapped in the print purpose of taking Dyne readings purpose of the crinkle test when testing an ink result if an excessive final drying temperature was used when printing polypropylene film property of ink that can be adjusted to reduce dot gain effect of using the ink returning from the ink fountain when checking the viscosity for ink whilst using ink pumps problems that result from the excessive use of slow solvents effect of the "yield value" of ink on the ink transfer of halftone dots reason why laminating inks once printed appear dull and easy to scratch result of excessive print area tension problems which the printer may associate with cold seals machine manuals, safety and other documentation that are relevant to this task, where they are kept and information that is included in these documents
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