Green Printing – Packaging and the environment
Tuesday, June 29th, 2010Green Printing – Packaging and the environment – 29th June 2010
Packaging is a prime target for complaints by environmentalists, who often see a printed carton as unnecessary, a waste of the earth’s valuable resources, or as litter in the gutter. They forgot that packaging can reduce waste: in countries using sophisticated packaging methods, food waste can be virtually nil; without it, wasted food levels through damage or rotting are much, much higher.
Litter is probably one of the most visible forms of pollution encountered by us all every day. A solution for it is very difficult to find, particularly if it is taken to include all aspects from individually discarded food wrappers, newspapers and the like to larger scale tipping of household or industrial rubbish unauthorised areas for quickness and cheapness. In fact, packaging plays a relatively minor part in what gets into the local rubbish tip.
Packaging is the target of the forthcoming EC Packaging and Packaging Waste Directive. Individual country initiatives such as the German Duales System Deutschland, allow for the setting-up of independent private waste collection outside the normal household system, so that the packaging could be collected separately and subsequent recycling ensured. Each package registered in the system is printed with the ‘Green Dot’ logo, for which a fee is paid, the income so generated going to pay for the collection scheme.
The German preference is for recycling above all other methods of disposal of packaging. Targets in the draft EC Directive are given as 60% recycling, 30% incineration and only 10% landfill within ten years. The French Eco-Emballage System and proposed Belgian Eco-Tax on packaging not including certain quantities of recycled materials, all seek to reinforce this dependence on recycling.
The UK relies mainly on land filling for disposal; of packaging, but the Government is now considering action with regard to encouraging waste collection and segregation for recycling taxation to discourage the use of landfill, increased re-use of some packaging, greater use of incineration with heat recovery, and council (or private) charges to enhance collection and segregation.
Careful consideration is being given to a wide range of options from an environmental, economic and practical point of View by central and local governments and industry.
Areas requiring significant discussion within such plans are the funding mechanism, practical application and end-use markets for recycled grades. Industry must and is establishing baseline data for wastes generated, materials which are recyclable, and end-use suitability.
In the UK, industry-based groups such as the British Carton Association and the Cellulose Fibre Industry Group (CEFIG) are very active in collecting data from membership, intiating industry activity, and lobbying and providing information to Government bodies.
Packaging companies such as Fields are considering the problem of solid waste management from several areas, including:
- Manufacturing waste generated during the conversion of raw materials into packaging products.
- Secondary wastes resulting from ancillary materials used for wrapping, and the protection of raw materials, and containers for liquid products such as inks and glues.
- Post conversion waste, such as household waste, which relies on consumer participation for further use.
Manufacturing waste results from the production of packaging in tow main forms. The first is trim waste due to the complicated shapes of packs, needed to hold a variety of finished goods. It is not possible to completely interlock and butt across a sheet of material or to produce three dimensional shapes without facilities to hold the shape as it is formed, and with these areas being trimmed-off or stripped-out later. Good planning and manufacturing practises ensure this type of waste is always minimised.
The second main source of industrial waste is a product being rejected as substandard, either as materials supplied to the printer or the printer’s products themselves. Again, improved production efficiencies and control, and the implementation of standard audited operating and quality assurance procedures to BS 5750 are minimising such wastes.
Post-industrial board waste generated during carton manufacture enters into a recycling system which allows in excess of 80% of the waste to be utilised, with market sectors continually being evaluated to make best use of these recycled materials, a very efficient, industry-based recycled system is in place and operative.
The types of materials used for packaging are very specific to their end use and food packaging in particular is strictly controlled both by the industry as a recognised need to protect consumers, and by legislation means under government control (notably the Materials and Articles in Contact with Food Regulations).
Recycled materials, because of their generally variable composition, are generally not allowed to come into direct contact with food, but recycled fibres are used as the bulk of boards such as white-lined chip with an outer virgin or coating layer. An example of the control of materials is the restrictions being placed on the use of heavy metals in packaging, or components of packaging. Ink makers are thus being forced to confirm that their products contain extremely low levels of lead, cadmium, mercury and hexavalent chromium even though these materials are not deliberately used in formulation but may be present as trace impurities. The possibility of taint or odour impeding product quality is rigorously tested by all suppliers, convertors and food manufacturers.
All of these points illustrate the technology required to produce the raw materials for packaging, and the rigorous procedures and test systems needed to convert these materials into safe, reliable packs for consumer.
The moves that paper and board makers are making to produce their products in a more environmentally-friendly way are described elsewhere in this publication, but it is perhaps worth mentioning that it is important in packaging to develop material grades that allow the overall weight of material per pack to be reduced.
As a major carton manufacturing company, Field Group Ltd is involved in many industrial group activities and internally is applying BS 7750- the Environmental Management Systems Standard- and developing a Life Cycle Analysis database for specific material grade and product comparisons. We are thus committed to playing our part in improving the environment.
Peter Harrison is Joint Managing Director of The Printing House Ltd, and Print Buying Direct of Crewe, Cheshire, UK.
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