FAQ: Häufige Fragen zum Thema Papierrecycling
The deinking process is a dip for mineral oils. They are being removed in the flotation as they are hydrophobic. The migration issue is more relevant in packaging materials which are produced without deinking.
Yes and no. In principal, the fibres are welcome. But they can contribute a lot of unwanted substances, mainly adhesives. The plastic window is no issue as it can be screened off. But the adhesives are difficult to remove – and there can be a lot of adhesives: to glue in the window, from stamps or address labels, and the self-adhesive seal. Furthermore, many envelopes have a light blue or grey imprint, printed with flexo inks that are not removable.