As a discerning amateur painter I first ordered a 36er Set Artina colors per 12ml. The colors were very good. I had already tried three colors from other manufacturers and found this property from OFFICE STORE PRICE unbeatable. That is why I ordered the 24er Set for stock 500ml. The delivery was quick and seller communication properly. The bottles were packed well and arrived undamaged an.Es was only but somewhat tricky to remove the tapes from the bottle without damaging the bottle label. But certainly could not leak during transport, which would be really annoying the ferns. I hope that the supplier will come up with something better. Yesterday I unpacked a stretcher and painted with the colors of the larger size bottles, which quite a lot of color needed. The coverage, coverage and luminosity are super. Dilution with water first forms some bubbles. But the bubbles disappear when you have a little patience. However, there is a small disadvantage that the colors minimal Chemicals (or solvent, if one can call it that) smell. The smell is to remember at a distance of one meter very little. The drying time (not too fast and not too slow) in such a way that one and procedure of sessions color transitions very well hinkriegt for my kind of painting quite optimal. Some might perhaps buy expensive "artists' paints". But I will long remain in this product. We recommend :-)