Copy of Conventional Label Printing Processes, Chapter 3&4 Conventional label printing processes: Chapter 3&4 Question Title * 1. Consider this statement: “There is a single large diameter central impression cylinder with letterpress printing heads located around it and drying units positioned between each of these print heads. The cylinder has a rubber surface which cushions the impression between the printing plate, the substrate and the impression cylinder to protect from damage”. Which type of press configuration is this describing in regards to letterpress printing? Letterpress - Platen-type Rotary letterpress - central impression Letterpress sheet-fed – flatbed Semi-rotary – letterpress Question Title * 2. Consider this statement: “This type of letterpress plate is the most common in the industry and is most suitable for full rotary presses. It is a film backed flexible plate which is mounted to the plate cylinder using accurately calibrated double sided adhesive film tape”. Which type of plate is this referring to? Polymer plate Zinc/magnesium plate Steel backed plate None of the above Question Title * 3. Which of the following is the correct sequence for the computer to plate (CTP) letterpress plate making process? Laser ablation, exposure, drying, post exposure Laser ablation, washout, exposure, drying, post exposure Laser ablation, washout, exposure, drying, post exposure, drying Laser ablation, exposure, washout, drying, post exposure Question Title * 4. Which of the following is not a way to identify the letterpress method of printing? The ‘halo’ effect resulting from too much pressure The ‘hard edge’ formed as a result of dot break up because the letterpress process cannot print a dot below 3% A saw edge is visible on the edge of text and any solid colour areas The indentation on the reverse of the substrate resulting from the pressure applied Question Title * 5. The sheet fed litho process is for: Wet-glue labels Self-adhesive labels printed in sheet form In-mould labels All of the above Question Title * 6. Which of the following statements is not correct regarding the litho process? Insufficient dampening allows the ink film to contaminate the non-image area so ink will be deposited in this area creating a scumming or catch-up A synthetic rubber blanket is used to reduce wear of the plate so is located on the impression cylinder The volume of ink film to the plate is controlled via the ink reservoir (called the ink duct) and is regulated through a system of rollers (called the roller train) None of the above Question Title * 7. Which type of drying system is best suited to printing on filmic and metallic substrates? Infra-red/hot air Oxidisation- natural evaporation Interdeck UV None of the above Question Title * 8. Which of the following is not considered an advantage of the offset litho process? Offset litho printing equipment is cheap to buy compared to other print processes There are no tonal restrictions, allowing a very fine dot to be printed Offset printing is very cost effective particularly when producing high quality work Very high production speeds and fast makeready can be achieved Question Title * 9. If a certain temperature is exceeded during the waterless offset litho process, the resulting print image can be affected in a similar way to if insufficient dampening occurs during conventional litho printing. It is therefore critical to maintain a constant temperature of below: 25˚c 27 ˚c 30 ˚c 35 ˚c Question Title * 10. Which of the following is not an advantage of waterless over conventional litho printing? Waterless gives better tonal values and shadow contrasts Waterless has sharper dot production Waterless has improved colour density and consistency Waterless doesn’t require special inks Done