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2003 Course Substrate & Ink Technology

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Total No. of Questions : 6] P1261 [Total No. of Pages : 3 [3864]-310 B.E. (Printing) SUBSTRATE & INK TECHNOLOGY (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answers to the two sections should be written in separate books. 2) Neat diagrams must be drawn wherever necessary. 3) Figures to the right indicate full marks. SECTION - I Q1) a) b) State the names of three sheet former machines used in paper industry and explain one in detail with speciality of paper. [10] Name the flexible packaging materials used in printing industry and describe in detail any one with its major forms. [8] OR a) b) Q2) a) Write the importance of stock preparation and refining in paper making industry and discuss in detail use of conical refiner in paper industry.[10] Mention with qualities of paper required for the following printing jobs (any two) : [8] i) Annual Reports. ii) Books. iii) Greeting cards. iv) News paper. Explain any two in detail : i) Opacity of paper in printing. ii) Brightness of paper. iii) Color and shade of paper. iv) Metric sizes in paper. [8] P.T.O. b) Explain the following points in detail while selecting the paper for printing job (any two) : [8] i) Finish of the paper. ii) Coated paper. iii) Size and weight of the paper. OR a) b) Q3) a) b) Which precautions will be taken, explain in detail, while placing an order in paper reels for printing job? [8] Discuss the importance of following properties of paper in your printing job. (any two) : [8] i) Moisture Content. ii) Cobb Factor. iii) Grain Direction. iv) Dimentional Stability. Discuss in detail the points to be considered under the indirect costing of printing job. [8] To find the total quality of paper required in the size 61 88 cms for printing 20,000 booklets in the size 210 mm 297 mm assuming each booklet contains 24 pages. [8] OR a) b) Calculate the total quantity of paper required in the size 45.5 58.5 cms for printing monthly magazine 500 copies in the size 210 mm 297 mm assuming the magazine contains 32 pages. [8] To find the length of 60 gsm paper in a reel width 62 cms. The weight of the reel is 300 kgs. [8] SECTION - II Q4) a) b) c) Describe in brief the Raw Materials required for the manufacture of offset printing inks. [6] With the help of neat sketch explain the process of flexographic printing. [6] What are dryers? Explain the purpose of their addition in ink formulations. In which type of formulation these are not required? [6] [3864]-310 2 OR a) b) c) Q5) a) b) Explain the principles of ink formulation. [6] Discuss the significance of color matching in the process of ink formulation. [6] Comment of UV curing printing inks. [6] What are the quality controls used in checking print qualities explain them in detail. [8] Discuss the concept of Green Printing . [8] OR a) b) Comment on any two of the following : i) Ink Trapping. ii) Ink Contrast. iii) Environment management system. Discuss the following : i) Significance of viscosity in offset print quality. ii) Ink water balance. Q6) Comment on any two of the following : a) Heatset and Coldset inks. b) Screen printing inks. c) Electrographic inks. d) White pigments used in printing inks. [8] [8] [16] OR Write short notes on any four : a) Plasticizers in inks. b) Security inks. c) Solid waste control. d) Dot variation and Print quality. e) Roto gravure printing. f) Printing inks and environmental considerations. vvvv [3864]-310 3 [16]

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