We are experienced in a wide variety of broken colour techniques, each requiring a different approach and set of specialist tools. The term 'broken colour' is an overarching term referring to several individual techniques including: French patina (fine overdrag of a weaker glaze); stipple (applied with hog-hair stipple brush of weaker glaze over ground-colour); colour wash (uneven distribution of cross hatch strokes of weaker glaze over ground colour); rag rolling (the use of special cloths or sponges to break up a weak-glaze over ground colour and softening using a badger brush); Frottiage (application of weak glaze over a surface and removal using specialist paper or various synthetic materials to create impressions and texture. Patina is also used when creating ageing on surfaces, referred to as the green rust coating (verdigris) of oxidising metals such as copper or bronze. This happens naturally to non-ferrous metals, however it can be enhanced by the use of chemicals to age surfaces and objects. These decorative techniques are created with the use of traditional oil and water glazes and appropriate chemicals.