Tuesday, 23 October 2012

What is design for print: Presentation notes

Print processes and applications commercial


- Practical
- Technical
- Echonominal


Areas of printing:
- Rotary printing
- Digital Printing
- Screen Printing
- Pad Printing


3 Types:
Litho - Planographic
Gravure - Intaglio
Flexo - Relief

Rotary printing:
- Offset lithography 
- Rotogravure
- Flexography


Rotogravure (gravure):
Copper plates (with mirror image) transfer link directly to print surface, usually on rolls.
Durable plates, good for longer print runs.


Flexography (Flexo):
A positive mirror image, rubber polymer plate is used on a cyclinder transfer and sticky ink is directly applied to print surface.


Flexo plate:
Rubbery / silicone plates usually used for food packaging

Offset Litho: 
Etched aluminium plates wrapped around a cylinder transfer link to an offset rubber blank roller and then to print surface. This can be sheet fed or web fed. 

Web offset machine:
Used for printing magazines ad newspapers, runs at high speed, uses rolls of paper not sheets with a built in folding mechanism. 

Digital printing:
No intermediate physical process. Ideally suited to short run or specials on a range of print media from paper to material.

Screen printing: 
Printmaking technique that uses a woven mesh to support on ink blocking stencil.

Pad printing: 
A printing process that can transfer a 2d image onto a 3d object.

Colour processes and applications

- Understanding the practical use of colour for production.

- Subtractive and additive colours.

Subtractive: 
Rich, darker area, more coverage of the layer

Additive: 
The more colours you miss the more the colour becomes lighter.

CMYK vs RGB
Colour space comparison image.

Colour systems
Technical essential knowledge for control of your work.

Terminology
CMYK, RGB, greyscale, duotone, spot colour and monotone.

Printing

Trio dramatic inks for overlays.


In todays session we looked at different examples of print, foiling, embossing etc. 

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