I'm the one who entered this formula on glazy. I obtained it from a Wallingford Art Center Potter spelled the way I entered it in glazy. I have to agree that that maybe it could be attributed to Rudi Staffel, especially given Wallingford's proximity to Philadelphia. It's a reliable glaze on cone 6 stoneware, Iron containing bodies do yield a milky opalescent effect. It's more of a milky clear on porcelain. This glaze is similar to the whitish glaze you see on Suzanne Kent's earlier work featuring her classic oxide strokes. I have a few of her pieces and to me this glaze seems similar to the glaze on her older work. I don't know for certain if this is the glaze she was using, just a guess. If you goggle her pottery you can find pics of her work. Hope this helps! Tina Hayes