The hardwood oxygen-delignified kraft "Ko" and issuing DEpDD fully-bleached kraft "Fb" pulps were provided by Fibre Excellence Saint-Gaudens kraft mill in France (Table ). Major wood species in the two hardwoods mix pulps were poplar, beech, oak, and chestnut (80% of the total). A, E, P, H: reactions were performed in PE bags. DEI water and chemicals were added to the pulp and the PE bag kneaded by hand for 2 minutes before place in a heated water bath. At half the duration of the reaction, samples were taken off the bath and briefly kneaded again, then replaced in the bath. Other conditions are reported in Table .