ISO 21993:2020 pdf free download. Paper and pulp — Deinkability test for printed paper products.The size of this pdf file is 7.65M.
ISO 21993:2020 specifies a basic laboratory test method for deinkability, applicable to any kind of printed paper product, under alkaline conditions by means of single stage flotation deinking and fatty acid-based collector chemistry.
The types and sources of paper for recycling are manifold. The most significant grades by volume are
packaging products from industry, trade and households, followed by graphic papers from households and to a lesser extent from offices. These papers are blends of a variety of individual products. Typical blends of graphic paper for recycling recovered from households contain many different products )rinted on papers with a high content of wood-containing pulp fibres and a lesser share of woodfree pulp fibres. Graphic paper for recycling originating from printing and converting operations is typically rather pure and may contain just one type of paper (wood-containing or woodfree).Paper for recycling from printing and converting, as well as special grades, constitute only a minor share of the total volume of paper for recycling. Special grades (e.g. liquid packaging or label stock release liners) sometimes require specific treatments during recycling.
Good deinkability of printed paper products is crucial for the sustainability of the graphic paper loop The key process steps for deinking are the detachment of the ink film from the paper, ink fragmentation into a suitable size range and removal from the pulp slurry. Flotation deinking under alkaline conditions is the most widely used technology for ink removal in the paper recycling process. A wider range of the process pH may be utilised for separately collected printed products on predominantly woodfree substrates.
In most cases, the industrial flotation deinking process is designed and operated to remove a variety of inks and toners. Alkaline pulping conditions and fatty acid based collectors are widely used. However, fatty acid based collector chemistry is not singly used in industrial deinking processes in soft water areas. Assessments based on this laboratory scale method give an indication of how the tested print product will perform in a full-scale alkaline flotation deinking plant, but it will not necessarily provide the same absolute result. An example of this type of relation is given by INGEDE Method 11 and the Deinking Scorecard of the European Paper Recycling Council.
ISO 21993:2020 pdf download
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