The effect of enzyme preparations and number of PFI mill revolutions on the weighted average fiber length.

<p>The effect of enzyme preparations and number of PFI mill revolutions on the weighted average fiber length.</p

Effects of enzyme treatment and PFI revolutions number on pulp freeness (a), water retention value (b) and fines content (c).

<p>Effects of enzyme treatment and PFI revolutions number on pulp freeness (a), water retention value (b) and fines content (c).</p

The dependence of tear resistance: breaking length ratio on enzymatic pulp treatment.

<p>The dependence of tear resistance: breaking length ratio on enzymatic pulp treatment.</p

Microscopic images (electron scanning microscope, 50 μm bar enables estimation of the fibres’ size) illustrating the effect of enzymatic pulp treatment on the appearance of fibres before and after refining.

<p>Microscopic images (electron scanning microscope, 50 μm bar enables estimation of the fibres’ size) illustrating the effect of enzymatic pulp treatment on the appearance of fibres before and after refining.</p

The effect of enzymatic pulp treatment on the number of PFI mill revolutions required to achieve the freeness of 30°SR.

<p>The effect of enzymatic pulp treatment on the number of PFI mill revolutions required to achieve the freeness of 30°SR.</p

The impact of the three enzyme preparations on refined pulp and paper parameters (for pulp freeness of 30°SR).

<p>The impact of the three enzyme preparations on refined pulp and paper parameters (for pulp freeness of 30°SR).</p

Effects of enzyme treatment and PFI mill revolutions number on breaking length (a) and tear resistance (b) of paper.

<p>Effects of enzyme treatment and PFI mill revolutions number on breaking length (a) and tear resistance (b) of paper.</p

The impact of the dose of enzymatic preparation and pretreatment time on the selected pulp and paper properties.

<p>The impact of the dose of enzymatic preparation and pretreatment time on the selected pulp and paper properties.</p

Tensile properties of laboratory paper sheets formed in water and different alcohols.

<p>Tensile properties of laboratory paper sheets formed in water and different alcohols.</p

Successive steps of hydrogen bonds formation between fibres in paper.

<p>A) bonding via a multimolecular water layer, B) bonding via a monomolecular layer of water, C) hydrogen bonds.</p