Re: Casein Sepia Photos Xpost
Gary these are fantastic. I did not buy quite the range of colors you have here, I only own titanium white, burnt umber, and ultramarine blue. These provide me an excellent set of base colors for doing underpaintings that lean cool.
I too have kind of fallen in love with Casein, the speed at which it dries to the touch is impressive, and though it does reactivate with water it does NOT reactivate with oils over them. Letting the casein dry to the touch and maybe a bit longer (a couple hours) then painting over in oils is totally fine from what I have found and results in a fast way to do an underpainting that is compatible with oils (both mechanically and chemically bonding).
I really enjoy just painting with them by themselves too. Interestingly, I have found no lifting with them, regardless of how much water I add over a NOT fully cured layer. Instead the result tends to be a blending with that previous layer. I consider "lifting" to be when the film comes off in a scaly kind of layer (like acrylic does when you scrape it off of a palette). This feature means I can treat Casein like I would Gouache or Watercolor, but only for a short while. . . after a couple weeks it's impervious to water and will no longer reactivate.
I with I had found Casein years ago, it's been a joy to work with, I definitely look forward to buying some more tubes here in the near future.