Our authenticity certificates are made from a bespoke mix of pulp fibres.
We try and utilise as much recycled waste fibre as possible, currently 50%. Each time the pulp is recycled, the constituent fibres get shorter and shorter and harder to drain each time. This means when it is formed into paper it won't lie flat.
Therefore we have to add virgin wood to provide the necessary quality of finish. We use 25% pine (softwood) and 25% eucalyptus (hardwood).
Softwood has very long fibres, which give the paper extra strength and help it drain, whilst hardwood has very short fibres that fill in gaps in softwood to create a more even finish.