1,208,809. Multi-layer coating. AGFAGEVAERT A.G. 30 Sept., 1968, No. 46280/68. Heading D1L. A plurality of photographic emulsion layers are cast on a continuously moving substrate 1 as it passes round a roll 2 from an adjustable casting block composed of segments 3-7 with intermediate pressure feed channels 9-12 each having a restricted outlet. The block may be adjusted to a set position or guides may allow a limited degree of movement. The segments may be stepped (as shown) or unstepped (Fig. 2).