Colour:  Bleu Charrette (Blue Charrette)
Details: Dry Ground Pigment
Technical characteristics : 
Chemical name : mixture of organic pigments and polysulfurized sodium aluminosilicate
Color index : B29 - B15
Apparent density : 870 g/l
UV resistance : average (generally, blue pigment have poor outdoor performance)
Coloring power : good
 
Use : lime, wax, paint, plaster, fresco, glaze, cement, fine arts.
This pigment is in powder. For use in artistic paint, it should be finely ground in a mortar before mixing it with the binder.
Linseed oil : dilute the powder in some turpentine oil before adding it to linseed oil.
Paint with water/lime paste : dilute the pigment in some water to make it liquid before incorporating it into the paint.
Lime powder/cement/plaster : directly incorporate the pigment (up to 10% based on the weight of the binder), then mix in order to stain all of your binder.
Color : sky blue slightly pulling toward gray mixed with a white binder.
This pigment is 97% natural.
Made in France.
History : who has never heard of the "bleu charrette" ? Behind this mystical name lies a simple explanation.
Formerly cart drivers painted their carts with some prussian blue and baryta sulphate. This one had the particularity of repelling insects. Interesting, but if this formula is not great for small animals, is it safe for us?
In our approach of "without danger / without polluting, we did not recover the recipe of our ancestors. Some people say with conviction that this beautiful painting was simply colored with pastel "Isatis Tinctoria". Perfect, this idea seduces us more, but will we know how to talk to plants, we, specialists in minerals ?
And who cares ? We do not drive carts any more and nobody is likely to be pursued by a mosquito in need of blood, right ?
In this case, here is our bleu charrette revisited, closer to its original color, or at least... It is believed.