Is all white glass milk glass?
Regarding this, what is white milk glass?
Milk glass is an opaque or translucent, milk white or colored glass that can be blown or pressed into a wide variety of shapes.
Similarly, it is asked, how do you identify milk glass?
A quick test is to hold the piece up in natural light. If you see an iridescent rainbow in the rim of the piece (you'll know it when you see it) it's authentic antique milk glass. That being said, some prefer the look of mid-century milk glass (post 1960) because of its bright white color and shine.
Most of the milk glass collectors encounter today was made by Westmoreland Glass and Fenton Glass. Wesmoreland began making milk glass in the 1920s, while Fenton started in the 1940s. Other companies such as Jeannette Glass, Fostoria, Indiana Glass, and L.E. Smith Glass also produced milk glass lines.