Photographie — Produits chimiques de qualité photographique — Méthodes d'essai — Partie 11: Détermination de la densité relative

Specifies a method of determining the specific gravity (relative density) of solutions used in photographic processing. Measurement is made by a hydrometer capable of measuring density to 0,001 units, after the test portion has reached thermal equilibrium with a water-bath (at 25 °C).