2.7. Thermomechanical analysis (TMA)The elasticity modulus (MOE) of different tannin based adhesiveswas obtained by a TMA instrument (Mettler-Toledo, SDTA840, NewYork, USA) with the STARe software (Mettler-Toledo, Version 14.0,New York, USA) for data treatment. Two beech veneers each 0.6 mmthick, bonded with each system, for a total samples dimension of21 × 6 × 1.2 mm were tested. The heating rate was 20 °C/min and thetemperature range was 25 °C–250 °C.