Unmodified commercial grade cornstarch (extra pure) was supplied by ACROS ORGANICS (New Jersey, US);
the moisture content was in the range of 10 to 12%. Commercial flavonoid mimosa barks tannin (Acacia
mearnsii, Mimosa OP) was provided from SILVATEAM (Cuneo, Italy). Commercial liquid UF resin for
particleboard production and Maritime pine (Pinus pinaster) particles were supplied by EGGER-ROL (Rion des
Landes, France). The UF resin had a density of 1280–1290 kg/m3, a pH of about 8.5–9, a U/F molar ration of
1/1.05 and a viscosity of 350–600 mPa.s, all measured at 20 ± 2°C; the gel time was 40-50 seconds at 100°C.
The content of free formaldehyde is maximum 0.15 % based on the liquid resin