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2003 Course Technology of Gravure & Flexo

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Total No. of Questions : 6] [Total No. of Pages : 2 [3764] - 308 P1487 B.E. (Printing) TECHNOLOGY OF GRAVURE & FLEXO (2003 Course) Time : 3 Hours] [Max. Marks :100 Instructions to the candidates: 1) Question Nos. 1 and 4 are compulsory. Out of the remaining attempt 2 questions from section I and 2 questions from section II. 2) Neat diagrams must be drawn wherever necessary. 3) Figures to the right indicate full marks. SECTION - I Q1) a) b) Explain in detail sections of a Gravure Press. Explain the Benefits and Limitations of Gravure Process. [10] [8] OR a) b) Q2) a) b) Explain in detail Configurations of a Flexo Press. Mention the applications and features of Flexo. [10] [8] Explain in detail the relation between Speed and Viscosity on Gravure print quality. [8] Explain the loading systems for Doctor Blade. [8] OR a) b) Write notes on i) Positioning of a doctor blade. ii) Reverse angle doctor blade. iii) Selection criteria for Gravure inks. iv) Back-up blades. Explain solvent and water based inks used in Gravure Process. [8] [8] P.T.O. Q3) Explain in detail web tension control system of a Gravure press. [16] OR a) b) State Causes and Remedies of the following: i) Misregister ii) Wrinkles/Creases Write notes on i) Web Viewing System. ii) Splicing Mechanism. [8] [8] SECTION - II Q4) a) b) Explain in detail fountain roll inking system in flexography. Write notes on: i) Factors affecting Anilox selection. ii) Elastomers for Fountain Roller. [10] [8] OR a) b) Q5) a) b) Anilox plays an important role in ink transfer in flexography. Explain. [10] Write notes on: [8] i) Anilox Cell configurations. ii) Fountain Roller Loading. Explain in detail properties of elastomers for Gravure Impression System. [8] Explain Moving Impression and Moving Cylinder Impression System on a Gravure Press. [8] OR a) b) Explain in detail Impression Loading System for a Gravure Press. Write notes on: i) Impression Shore Hardness. ii) Sleeve Impression Roller. Q6) Explain in detail optimization of a Flexo press. [8] [8] [16] OR Explain in detail standardization of a Gravure press. TTT [3764]-308 2 [16]

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