European paper for recycling falls into 5 main categories: ordinary, medium and high grades, kraft grades, and special grades. Within these are over 60 sub-category grades. They are either pre-consumer paper waste that has been discarded from a paper mill, or post-consumer waste of the kind that is collected from households.
What are waste paper grades for?
Waste paper grading provides guidance on the quality and composition of paper for recycling. Manufacturers have specifications for their paper and board products that cover fibre type, chemical ingredients and the percentage of recycled content. Their choice of graded waste paper for use as a secondary raw material in the manufacturing process is largely determined by these specifications.
No international standards for recovered paper
There is currently no global standard for waste paper grades. Several nations and trade blocs, including the United States and Australia, use their own grading categories and enforce different rules on contamination, for example. Some countries such as India classify scrap paper as hazardous waste, while others don’t classify it as waste at all (Italy). This creates uncertainty for international waste paper traders who need to ensure that the materials they ship – and the documentation that accompany the shipments – meet all the requirements of every country involved. Hence the growing popularity of commodity trading and risk management CTRM software.
How is waste paper assessed?
Paper mills and traders will typically assess the strength, quality and utility of paper for recycling before buying it. Grading is part of this assessment, but buyers also conduct site visits and visual inspections to establish the quality, level of contamination, and moisture content of what they are being sold. This includes seeing how the material is stored.
While some recovered papers can deliver high whiteness, smoothness, and runability (which indicates how easily it moves through a printing press), the length of paper fibre shortens every time it is reprocessed. This limits what it can be used for and the number of times it can be recycled (6 times is considered the maximum). Some types of paper such as tissues and laminated paper cannot be recovered, because they are bonded with materials unsuitable for recycling.
European standard grades for waste paper
The following paper grades are defined by European Standard EN 643 agreed by the Confederation of European Paper Industries (CEPI). The 2013 revisions introduced maximum tolerance levels for non-paper components (1.5% for most grades) and for unwanted materials. Grade descriptions were also amended to reflect the composition of the material rather than its origin.
According to these standards, natural fibre-based paper and board suitable for recycling is defined as: ‘paper and board in any shape or product made predominately from paper and board, which may include other constituents that cannot be removed by dry sorting, such as coatings, laminates and spiral bindings.’
Ordinary and medium grades
Ordinary grades tend to contain short fibres, including sub-categories such as mixed paper and board, grey board, mixed newspapers and magazines, corrugated paper and board, and sorted graphic paper for de-inking. Medium grades contain unsold newspapers free from inserts, printed white shavings, sorted office paper, coloured letters, white books, coloured magazines, and continuous computer print-out paper.
High and kraft grades
High grades are mainly white papers made from virgin fibres such as mixed lightly coloured printer shavings, binders, letters, white business forms, white computer print-out, printed multi-ply board, white shavings and unbleached board. Kraft grades derive mostly from brown unbleached packaging materials such as paper sacks and corrugated boxes. Their long and strong fibres are particularly suited for recycling into new packaging.
Special grades
Special grades tend to combine papers that are not considered profitable to sort. Special grades are often used in the middle layers of packaging papers and boards. Examples of special grades are mixed recovered paper and board, mixed packaging, wet-strength papers and labels.