This Anchor Hocking milk glass casserole was positive for lead when tested with an XRF instrument. The blue flowers were 18,600 +/- 400 ppm lead (Pb) and 137 +/- 13 ppm cadmium (Cd). The flowers were non-detect for mercury (Hg) and arsenic (As.) The milk glass on this piece was negative for lead, mercury, cadmium and arsenic. On this video you can also see that the blue flower pattern tested positive for lead (bright red!) when tested with a LeadCheck swab!
My advice: Avoid vintage milk glass pieces in your home whenever possible, especially those that are painted with brightly colored decorations.