When conservators used X-rays to analyze Rembrandt’s 17th-century masterpiece “The Night Watch,” they discovered something unexpected under its surface: lead.

Apart from oil-based paint layers, some of the layers were made of natural resins, proteins, gums and, in some cases, a resinous, varnish-like layer. Protein-based material can indicate the use of ...

New Zealand artist Hannah Jensen Fox is renowned for her distinctive technique of carving delicate, nature-inspired designs into acrylic paint, transforming each work into a richly textured ...