temps (durée) (1) nitrate (1) musée (1) hydrolyse (1) analyse (1) film (1) environnement (1) air (1) distribution (1) investigation (1) dégradation (1) classification (1) chimie (1) cellulose (1) ordre (1) Chemical warfare (1) Composition (1) Photographs (1) Acetaldehyde (1) Cellulose acetate (1) Volatile organic compounds (1) Dimethylformamide (1) Technique (1) Vinegar (1) Twentieth century (1) Time (1) Spectrometer (1) Photography--Films (1) Photographs (1) Order (1)