Patents for paper deacidification

Notas: Resumen: The brittle-paper problem has challenged chemists and technicians to search for remedies. Since the beginning of relevant research in the first half of the last century more than 70 patents have been issued. After a highlight in the early and a certain drop in the late 90s a new rise is observed in the first years of the new century, concentratinf on safer and more environmentally friendly chemicals and procedures.
Texto en inglés con resúmenes en inglés, francés y alemán