I actually wondered how long it would take for me to hear from you Christine.......
Was it used by a variety of houses.... blown glass? Pressed Glass..... Is it uncommon glass? I am really not familiar with it since my primary focus is early Bohemian / Czech and some mid century stuff.... I do not believe I have ever seen a Kralik piece that uses it... or Loetz, Welz etc....
Can I see pics of your favorite pieces??
Anita..... I am not sure of the technique used to achieve it.... maybe someone on here will actually know..... I looked at it with a loop and it appears far too geometrically structured to be any kind of glue chip. I actually wondered if it was a mold pattern, as the ice like pattern continues to the underside of the piece. That being said, if it was a mold pattern, it would make sense that the piece is small as the work required to make the mold with this pattern in it would have been quite intense.... On the other hand there is a definitive smooth area between each of the frosted panels making me wonder if it is some type of application after blowing the blank. I have scraped at it in a small area and it does not seem to want to come off at all. It reminds me of stuff we used to buy when I was a kid to spray on windows at Christmas to make them look like they were frosted with ice.... You sprayed it on and it dried leaving the crystalline pattern like this. That stuff scraped off very easily. This shows no wear of any kind that I can find so if it is an application, it is a really strong one..... The edges of both types of the frosted panels feel raised from the smooth area in between each of them.... I really have no idea how it was done....
It is really pretty unique, especially for Kralik.....
Craig