ISO 18907:2013规定了一种测定和定量表示照相胶片和相纸脆性的方法。 该方法适用于带或不带明胶背衬的胶片，以及纤维基或树脂涂层（RC）相纸。它也适用于原材料或加工材料。

ISO 18907:2013 specifies a method for determining and expressing quantitatively the brittleness of photographic film and papers. The method is applicable to films with or without a gelatin backing and to fibre-based or resin-coated (RC) photographic papers. It may also be applied to either raw or processed materials.