Flexographic Printing Process
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Flexographic Printing Process Syllabus — Unit-wise Content
The official GTU curriculum for Flexographic Printing Process (subject code 4355805) as prescribed for PT · Semester 5 divides the course into 4 units, covering 29 listed topics. The unit-wise breakdown below is read from the GTU syllabus document for this subject code, so you can check what the course actually covers before deciding which papers to attempt.
Download the official syllabus PDF (4355805)Unit 1 Introduction to Flexographic Printing Process
- 1.1. History and development.
- 1.2. Characteristic of flexographic printing process.
- 1.3. Working principle of flexographic printing process.
- 1.4. Advantages and Disadvantages of Flexographic printing process.
- 1.5. Comparison with other Printing process.
- 1.6. Image Processing for Flexographic printing process - Original, Films, Need for special colors and variables.
- 1.7. Application of Flexographic printing process.
Unit 2 Image Carrier preparation
- 2.1. Design consideration for flexographic reproduction, Type of negative and requirements, screen ruling, screen angles, dot shapes, effect of plate thickness on elongation, shrinkage allowance, compensating image elongation.
- 2.2. Rubber plates – Different stages in Rubber plate making – master pattern metal engraving, matrix moulding: matrix press (vulcanizer), Metal backed rubber plate.
- 2.3. Photopolymer Plate - Parts of flexographic plate - face, floor, shoulder, base, back, floor-depth, Photopolymer - physical and chemical properties, shore hardness.
- 2.4. Plate Exposing and developing unit - types of UV and types of exposure, developing chemicals. Liquid and sheet plates - Construction, stages in making,
- 2.5. Trouble-shooting, comparison and quality control. Plate mounting equipment and systems, Metal backed plates, problems and remedies in plate mounting, plate mounting tapes. Unit– III 3a. Select workflow for CtP plate preparation.
- 3.1. CtP Machine - construction and working, comparison between visible Flexographic Printing Process Course Code: 4355805 Computer to Plate (CtP)
- 3.2. Advantages of CtP system over conventional plate making methods.
- 3.3. Plates for CtP flexo - laser engraved rubber rolls, integral mask system.
- 3.4. Problems and Remedies in plate making.
- 3.5. Plate Processing Machine - Construction and working.
- 3.6. Quality control check points for Flexographic plate making.
Unit 3 Printing Machine Configuration
- 4.1. Principle types of printing machine configurations - Narrow web and Wide web, Stack, CIC, Inline, construction,
- 4.2. Applications, advantages and limitations.
- 4.3. Plate cylinder- construction, types - integral, demountable, sleeves and magnetic.
- 4.4. Impression cylinder - construction, loading method -pneumatic or hydraulic.
- 4.5. Hybrid Printing machines (Combination of Flexography and Screen Printing) - construction, working and Application.
- 4.6. Inline converting operation- slitting, laminating, punching coating, dye cutting etc.
Unit 4 Ink Metering System
- 5.1. Inking system – Need of ink metering, construction and working of inking system with fountain roll and without fountain roll, Reverse angle doctor blade system, Chambered doctor blade system.
- 5.2. Anilox Roll - Specifications- cell wall, land, depth, opening, cell count, cell volume, cell angle, depth to opening ratio.
- 5.3. Different types of engraving on anilox roll and methods of engraving, Considerations for choosing proper anilox roll.
- 5.4. Drying systems. Unit– VI 6a. Select treatments according to end product
- 6.1. Surface treatments for Non Absorbent substrates -Corona, Flexographic Printing Process Course Code: 4355805
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