A water-based two-step hot-pressing procedure was used to prepare the final papers, which is modified from previous studies.Firstly, wet papersheets (~30 wt. %) were prepared from holocellulose suspensions (~0.4 wt. %) using a Finnish Sheet Former. Then each wet papersheet was pressed under 1 MPa at room temperature for 5 min,followed by a second pressing using a 105 °C pre-heated press at 15 MPa for 15 min. A 5 kg weight was placed atop the final holocellulose paper to limit warping during cooling Kraft paper was obtained through the same procedure starting from Kraft pulp. The density and grammage of the final papers were determined by measuring their thicknesses, dimensions, and masses.