ingrid houchin

Thin pickings ... but it looks like she sprayed kaolin slip onto really dry sanded clay.
From https://www.mi.sanu.ac.rs/vismath/friedman1/index.html
I build big forms, the clay will dry slowly and not collapse. When the form is ready and the clay is dry, I sand away at the surface and then spray it with a slurry of kaolin. The pieces are finally fired in stoneware temperature, about 1250
 
From https://www.callancontemporary.com/press/non-present-presence-eva-hild-s-evocative-sculptures-fill-space-with-meaning-and-poeticism-art-new-orleans
Each work is monochromatic, either in pristine white or rich, chocolate black, and results from a four- to six-month-long process. Hild shapes stoneware clay into coils, allowing plenty of drying time, then fastidiously sands and sprays them with kaolin coating to impart a preternaturally matte finish. Finally, she fires them at 1,250 degrees Fahrenheit, ending their long genesis and beginning their new journeys as objects d’art.

I think something might have been lost in translation. Makes more sense that it is an engobe that Hild uses.
Example work below from Forrest Gard with a similar finish, albeit a little coarser, using one of Rhodes engobe recipes. If the engobe was sprayed on dry clay then polished with a diamond pad after firing I think it would very much resemble the finish on Hild's work. For her chocolate black pieces there must be other ingredients to maintain the dark chocolate black colour.

 
 

I use the E6000 all the time for doing different things w/my cone 6 bodies--I like that in addition to clear, I can also get it in black, and the black does not fade over time.

thank you very much for your quick answers. Merry Christmas.