| Lesson
No 1: Duplicate Plates.
Theory.
|
Marks |
Hours |
1.1 |
Concept of duplicate plate. Difference between duplicate
plate and conventional -founders typeset, mono typeset
and lino typeset- image carrier.
|
2 |
1 |
1.2 |
Advantages and disadvantages of conventional and duplicate
image carriers.
|
2 |
1 |
| Lesson
No 2: Metal Stereo (Stereotype plate).
Theory.
|
Marks |
Hours |
2.1 |
Preparation of forme. Different components such as wet
flonge, dry flonge and Plaster of Paris used to prepare
mold. Finishing operations performed on stereos such as
routing, beveling, polishing and mounting.
|
3 |
2 |
2.2 |
Study of hydraulic molding press and its components,
backing of the mold before casting. Casting a stereo (flat
and curved) and precautions (quality control) to be taken
while casting the stereos.
|
3 |
2 |
| Lesson
No 3: Electros (Electrotype plates)
Theory.
|
Marks |
Hours |
3.1 |
Metals used for the preparation of electro.
|
2 |
1 |
3.2 |
Preparation of forme, wax mold in making electro.
|
2 |
1 |
3.3 |
Preparing wax mold ready for deposition (plating) of
metal (e.g. Cu, Ni) by graphite powder coating.
|
2 |
1 |
3.4 |
Detail study of electrodepostion of Cu or Ni metal and
chemistry involved in the process
|
2 |
2 |
3.5 |
Finishing operations performed on Cu or Ni shell (plate)
such as facing, backing, routing and mounting. Resolution
and applications of electros.
|
2 |
2 |
| Lesson
No 4: Block making.
Theory..
|
Marks |
Hours |
4.1 |
Differences between block and duplicate plates. Types
of block-line and half tone.
|
2 |
1 |
4.2 |
Metals used in block making such as Cu, Zn. Negatives
used in block making.
|
2 |
1 |
4.3 |
Study of different stages in block making, study of different
chemicals and raw materials used in block making. Study
of factors affecting the quality of etched block.
|
3 |
4 |
4.4 |
Finishing operations performed on block such as routing,
beveling and mounting. Advanced techniques in block making-
powderless etching.
|
3 |
3 |
3.5 |
Finishing operations performed on Cu or Ni shell (plate)
such as facing, backing, routing and mounting. Resolution
and applications of electros.
|
2 |
2 |
Section
II : Flexography |
|
|
| Lesson
No 5: Introduction
Theory. |
Marks |
Hours |
5.1 |
History and development
|
Nil |
1 |
5.2 |
Comparison with other printing processes (Advantages
and limitation) and applications
|
6 |
2 |
| Lesson
No 6: Design consideration.
Theory. |
Marks |
Hours |
6.1 |
Design consideration for flexographic reproduction,
effect of thickness on elongation, shrinkage allowance
|
4 |
2 |
| Lesson
No 7: Image Carriers
Theory. |
Marks |
Hours |
7.1 |
Parts of printing plate-face, floor, shoulder, base,
back, floor-depth
|
4 |
2 |
7.2 |
Rubber plates- Different Stages in Rubber Plate Making
 a) Master
pattern metal engraving: Types of negative, metals
for
pattern plate & engraving, etching of metal, screen
ruling, screen
angles, dot shapes, spectral requirements for
flexography
b)
Matrix moulding: Matrix press (vulcanizer), setting the
thickness
of control bearers, procedure of matrix moulding
c) Rubber
plate moulding: Types of rubber, storage method,
calculating
image elongation, deciding plate thickness, setting
the
thickness of control bearers.
d) Metal
backed rubber plate, magnetic plate mounting
system.
|
|
|
7.3 |
Photopolymer plate-
a) Varieties of photopolymer- physical & chemical
properties, negative preparation.
b) Liquid and sheet plates – Construction, stages
in making, trouble-shooting, comparison & quality
control
c) Plate mounting equipments, problems and remedies in
plate mounting
|
4
8
6
|
|
7.4 |
Computer to Plate (CtP) –
a) Block diagram, components, ideal system, comparison
between visible light & thermal ablation method, advantages
of CtP system over conventional plate making methods
b) Plates for CtP flexo- laser engraved rubber rolls,
integral mask system
|
4
4
|
3
2
|
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