Why does dry papier mache smell bad?

Dry papier-mâché can smell bad due to the materials used in its creation, particularly if glue or paste is involved. Some adhesives, especially those that are water-based or contain certain solvents, can emit unpleasant odors as they dry. Additionally, any organic materials, like paper, can develop a musty smell if they were damp or improperly stored before use. Ensuring good ventilation during the drying process can help mitigate these odors.