Materials
- Created by: Michaela
- Created on: 11-04-14 10:17
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a) Paper and Board
Mechanical Pulp
- Provides a 90% yield from pulpwood due to using whole logs apart from bark
- Costs are low in terms of investing in mills in comparison to other processes
- Paper can be bleached to create a higher quality
- Lower strength than softwood chemical pulps
- Paper can yellow if exposed to lights because of the high lignin content
- Due to bleaching there is the issue of sustainability
Chemical Pulp
- Wood pulp is a higher quality due to stronger and longer fibres and fewer impurities
- Lignin wasted can be burnt as a fuel substitute (power for natinal grid)
- Paper is whiter and so used for copier paper
- Produces lower yield than mechanical method as lignin is dissolved and separate from fibres
- No chemical pulp is roduced in the UK meaning it must be imported
- More costsly process
Waste Pulp
- Uses recycled paper which is a sustainable resource
- Suitable for lower grades
- Suited for bulk grades of paper like newsprint, tissue and packaging boards
- Cannot be fully recycled as pulp loses its quality
- Doesnt save energy when processing
- Requires additives to create a suitable quality
Drawing Papers
Layout
- Allows tracing and transfering of ideas
- Allows skethces to be outlined from page layouts
- Allows for features to be added without recreating images - time saving
- Relatively expensive
- Flimsy
- Prone to tearing
Tracing
- Similar properties to layout
- Used for transfering of drawings
- Saves time in development process
- Heavier in weight
- Can be quite expensive
- Prone to tearing
Copier
- Available in a range of colours
- Inexpensive when purchases in bulk
- Had wide range of applications
- Bleached white - sustainability issue
- Not easily disposable
- Environment degradation during manufacture
Cartridge
- Accepts most media
- Great strength and thickness
- Good for drawing paper - variety of weights for medias
- More expensive than copier paper
- Ink pens can sometimes cause bleeding
- Paper is rough
Commercial printing papers
Bond
- Inexpensive when purchased in bulk
- Available in wide range of colours
- Used for graphic work - rag pulp which is stronger paper
- Much higher weight
- Lower aesthetic quality
- Rougher texture
Coated
- Smooth flat surface for printing
- Comes in a range of finishes (high, gloss and silk)
- High quality - for products subject to repeated handling
- Relatively expensive
- Not suitable for sketching - only printing
- Not suitable for books, etc.
Commercial card and board
Mounting board
- For presentational work and displays
- High quality - strength and rigidity
- Available in wide range of colours
- Expensive to buy
- Not suitable for fast prints
- Colour is only on one side (white on back)
Recycled
- Eco friendly product
- Good for items like disposable trays and inner sleeves
- Inexpensive
- Lower quality compared to other cards
- Has a 'flecked' appearance
- May not have as long a life span
Folding boxboard
- Good for scoring, bending and creasing without splitting
- Great printing surface
- Relatively inexpensive
- Not as high quality as solid white board
- Can only be printed on one side
- With one bleached side, may not be as durable as solid white
Corrugated board
- Has good impmact…
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