Presentation on theme: "Edexcel – Product Design: Graphics"— Presentation transcript:
1 Edexcel – Product Design: Graphics Paper and BoardEdexcel – Product Design: Graphics
2 Paper and Board Producing wood pulp Manufacturing of paper and card Cards and boards;Drawing papersCommercial printing papersCommercial card and boardCommercial packaging materials
3 Producing wood pulp Mechanical Chemical Waste Pulp Wood is ground down (this softens the lignin)More wood produced (quantity)Chemicaluses chemical solutions to convert wood into pulpAcids or alkalisBetter quality paper/board producedNot done in UK – must be importedWaste PulpRecycled paper and board is used in both mechanical and chemical processesLower grades of paper and board, not as strong
4 Producing Wood Pulp Wood is made of different materials One of which is ligninLignin is great for binding all fibres togetherSoftwoods and hardwoods are usedSoftwoods offer more strengthHardwoods offer a better finish
5 Manufacturing of paper and card Most modern papermaking machines are based on the principles of the Fourdrinier Machine.Paper machines have four distinct operational sections:Forming section (wet end)Press sectionDrying sectionCalender section
6 Forming SectionSlurry of fibres is filtered out on a continuous fabric loop to form a wet web of fibre
7 Press SectionWet fiber web passes between large rolls loaded under high pressure to squeeze out as much water as possible
8 Drying SectionA series of steam heated drying cylinders. Drying removes the water content
9 Calendering SectionHeavy steel rolls smooth the dried paper
10 Card and Board Reminders: Paper Board Weight in gsm Thickness in microns
11 Cards and boards Drawing papers Layout Tracing Copier Cartridge lightweight, thin white paper- used for initial ideas- takes colour media well- low costTracingthin, translucent paper- making copies of drawings- high costCopierFairly cheap when bought in bulk and is available in a range of colours. It is also used for photocopying and inkjet printing usually.Cartridgegood quality white paper- available in different weights- general purpose work- can be used to make simple models- medium cost
12 Cards and boards Commercial printing papers Bond Coated a high quality durable writing paper similar to bank paper but having a weight greater than 50gsmused for letterheads, other stationery and as paper for electronic printers.Coatedhas been coated by a compound to impart certain qualities to the paper, including weight, surface gloss, smoothness or reduced ink absorbency.for high quality printing used in packaging industry and in magazines
13 Cards and boards Commercial card and board Mounting board Recycled good quality thick card- coloured surface- used for final models- used for mounting workRecycledUsed in secondary packagingmay contain traces of inks, adhesives, and other residues which together give it a grey colourLess predictable composition and poorer functional properties
14 Commercial packaging materials Folding boxboardcomprises of middle layers of mechanical pulp sandwiched between layers of bleached chemical pulp. Used in primary packaging.Corrugated cardstrong and lightweight, used for packaging protection and point of sale stands, available in different thicknessesSolid white boardWhite board is a strong medium it is bleached so it provides a good surface for printingFoil lined boardis good quality cardboard with a aluminium foil lining. This type of container is ideal for ready made meals or take away meals. The foil retains the heat and helps keep the food warm.
15 TaskSort out the papers and boards into the correct sequence.