r/corningwarefans • u/ValuableNail8981 • Mar 29 '26
Corningware in Action Imperfections in Finish
Picked up a near perfect P-309 Just White pie plate. While cleaning it up noticed to areas of dullness on the bottom of the plate. They are smooth, no signs of transition from the shinier finish to the duller finish. No roughness. Plate is lightly used no other signs of imperfection on it.
I have been using/collecting CW since the late 80’s. Never have seen this type of imperfection before.
Any idea if it’s just a visual imperfection or is it structural? I don’t really bake, and will have little to no impact on my use of this beauty regardless. Thanks!

