GLOSSÁRIO ILUSTRADO DE CONSERVAÇÃO E RESTAURAÇÃO DE OBRAS EM PAPEL DANOS E TRATAMENTOS

acidic paper (1.25)
soporte ácido (es) suporte ácido (pt) όξινο χαρτί (ελ)
Damage caused by the presence of acidic components
in paper.
See also: yellowing; darkening; brittle paper; acid migration.
Note: acidity is one of the main degradation factors in paper, especially
industrial paper produced between the mid-nineteenth and the late
twentieth centuries. There are several sources of paper acidity, with the
main one being the acidic sizing system used during that period, but also
others such as atmospheric pollution, acidic products of cellulose and lignin
degradation and acid migration from acidic adjacent papers. Acidic paper is
mainly degraded by acid hydrolysis, which is accelerated by heat, humidity
and exposure to light.
312