B. Papers and Boards Flashcards
How is paper measured?
GSM (grams/square metre)
Layout paper
Properties: Medium opacity sheet with a smooth finish
Weight: 60-90 GSM
Uses: Sketch and design work
Tracing paper
Properties: Off white, low opacity sheet
Weight: 60-90 GSM
Uses: Copying, overlays and tracing drawings
Cartridge paper
Properties: Thick white paper with a textured surface
Weight: 120-150 GSM
Uses: Sketching. watercolours, ink drawings
Bleed proof paper
Properties: Thick coated paper that prevents inks from bleeding
Weight: 120-150 GSM
Uses: High quality illustrations with colour richness and vibrancy
Grid paper
Properties: White paper with a printed grid of squares, isometric lines or other patterns
Weight: 80-100 GSM
Uses: Scale models, scientific drawings, model making
Grid paper
Properties: White paper with a printed grid of squares, isometric lines or other patterns
Weight: 80-100 GSM
Uses: Scale models, scientific drawings, model making
What is card’s weight range?
200-350 GSM
Corrugated card
Properties: Two layers of lightweight card containing a fluted layer for strength. Fully degradable and recyclable
Uses: Packaging for impact protection
Foam core
Properties: An inner foam core with a paper face. Rigid and stiff
Uses: Model making, mounting artworks
Ink Jet
Properties: Treated card with smooth, bleed-proof printable surface
Uses: Printing photographs and artwork
Foil-lined board
Properties: Card coated with aluminium foil on one side. Foil retains heat, keeping the contents warm and creating a moisture barrier
Uses: Takeaway containers
Duplex board
Properties: Two layers of card bonded together, with a white external layer. Tough with a bright white appearance
Uses: Suitable for packaging. Used with a waxy coating for food and drink containers
Solid White board
Properties: High quality board, brilliant white smooth finish on both sides
Uses: Greetings cards, quality packaging and book covers
What is the paper making process?
- Source material
- Pulp
- Sizing
- Pulp to paper
- Calendering
Describe Step 1 of the paper making process
- Source material
- Trees or grasses are cut and taken to a paper mill.
- Timber is debarked and chipped
Describe Step 2 of the paper making process
- Pulp
- Chips are added to a chemical solution and cooked to separate the cellulose fibres
- The pulp is pounded and squeezed; chemicals are added to alter the opacity
- The end liquid is then bleached or dyed to the desired colour
Describe Step 3 of the paper making process
- Sizing
- Liquid pulp is mixed with additives to produce different types of paper finishes
- This affects the absorbency of the product
Describe Step 4 of the paper making process
- Pulp to paper
- Pulp is fed onto a mesh conveyor
- It is passed through a series of rollers to remove excess water
Describe Step 5 of the paper making process
- Calendering
- The paper passes through calender rollers which give the paper its final finish
Why are softwoods more eco-friendly for making paper pulp
- Softwood trees grow more quickly and absorb more CO2 during their growth period
- The output of paper pulp per hectare is higher over time
Properties of paper towels
Treated with resins to retain the towel’s structure when wet to prevent tearing and increase absorbency