I did another glaze firing in October. (Busy with family and friends and holidays since then.) Several of the pots were glazed similarly. Ida's White is a glaze formula that I got from the Blossom Hills Crafts studio in Los Gatos, CA. It produces a creamy white mat surface. Adding some red iron oxide (RIO) results in a beige color. I added a little too much RIO so the fired glaze was a pretty dark beige - more like brown.
I applied the glazes by dipping. Where the Beige and Ida's white overlap the color is a lighter beige.
The dark spots (freckles) are caused by the iron in the clay body - "Long Beach" from Aardvark.
This one doesn't have freckles because the clay body, "Hopkin's White" from Aardvark, doesn't have iron in it.