Schmincke recognise that each colour has its own individually optimized formula to maintain the unique working properties and performance of each colour for the artist. Only the perfect combination of Gum Arabic and Oxgall (wetting agent) mediums for each pigment result in the perfect flow of the HORADAM® AQUARELL water-colour. The re-usability of the range is a stand out feature of the formulation with the ability to re-use the colour when dry on the palette allowing for continual use over extended periods representing true value to the artist and a unique workability of every colour. With regards to Pan colours Schmincke’s unique technique involves the filling of each pan with liquid colour 4 times and allowing each layer of colour to dry for some weeks in a drying chamber to a certain degree of residual moisture. Each Pan of colour is ready for sale only after 3-5 months of production. Truly a commitment to excellence.