Sally Mann Documentary, print coating

[Luseboy]

Hello,
not sure that this is quite the right place to be asking this, but I figured that most of the frequenters on the alt. process thread would know most about this. Well I'm watching the Sally Mann documentary, "what remains," and i see her coating her prints with a brownish glop. What is this? What is it's purpose? Is this how she often gets the warm yellowish tone to her prints (i can't quite figure out if it's from the glop, or toning, or is the glop a toner?)
appreciate any insight on this!
-Austin
Also, later in the documentary, she uses a similar glop that is a deep blue, giving the image a bit of a cold tone. I'm not sure if it is the same thing with a different color or not, but if that helps with your identification of it.

[Johnindc]

I saw her exhibit at the VMFA. The photographs are treated with sandarac varnish or Soluvar matte varnish mixed with diatomaceous earth.

[Jeff Kubach]

I saw her work at VMFA a while back, good stuff!

Jeff

[ChasBosio]

She coats those with a resin that she must mix from two parts.
I saw them at a gallery. Smooth plastic-like surface. Wonderful depth, Very cool.
I have seen similar stuff at Plaza Art and Michaels. Very expensive at those places.

Charles

[Luseboy]

It looks really cool! is there anything similar that doesn't cost so much?
-Austin

[aclarkphtgrapher]

Sandarac vanish is really not that expensive. You can get it from Bostick and Sullivan along with a wet collodion kit. Diatomaceous earth can be found at places like Southern states landscaping. It is mixed in the varnish and then coated to the print. Sometimes she does tone her prints with tea or some other tannic toner. It's very interesting stuff.