papier de mauvaise qualité

CONT: [Une des] causes les plus courantes de détérioration des œuvres sur papier [est l'acidité] inhérente des papiers de mauvaise qualité utilisés pour certaines œuvres [...]

CONT: Low-quality paper like newsprint or groundwood is often produced without lignin removal and is therefore acidic and prone to rapid deterioration.
CONT: The poorer quality the paper, the more likely it is to become brittle and darkened with exposure in just ordinary conditions. Pages made from low-quality paper need more protection from light, heat, humidity, and one another.