PBk7, PR101, Series 1, Opaque, Very Good Lightfastness L'Aquarelle Sennelier has been produced in the same way for more than a century using the best pigments and top quality Kordofan Gum Arabic as a bonding agent. This mix of natural ingredients produces colours which have a smooth, bright texture and offer lively, colourful shades. The Gum Arabic and honey combination offers incomparable quality of application, producing superb washes. Then, this base is mixed with pigments and carefully ground. Sennelier makes sure to wet the pigments in purified water (with no mineral salts) for 24 hours before mixing them in with the bonding agent. This improves the way in which the colours and bonding merge together, in turn bringing out the full beauty of the colours. Sennelier watercolours are ground in the traditional way using grindstones rotating slowly so as not to heat up the paste. This operation is carried out in several stages until the paste are as fine as possible thus getting rid of any particles which might impair the perfection of the wash. This exceptional and very high quality watercolour will help you make your works even more powerful due to the liveliness and purity of the hues. The colours mix together perfectly, offering superbly subtle shades. These smooth, intense colours will be a genuine pleasure to paint with. The addition of honey will allow the tubes and pans of Sennelier watercolours to stand up to the passing of time and each time you will paint with them you will be able to accurately translate the diversity of light, shape and hues.