What are Pyrosil and Pyroflam? 

Pyrosil and Pyroflam are alternative international brand names for Corning Ware glass-ceramic cookware.  Corning Ware for the European market was manufactured at Groningen, in the Netherlands.  The factory was established in the early 1960s and it was owned entirely by Corning Glass Works in the United States. 

When the product was distributed by James A. Jobling's Wear Glass Works in the United Kingdom, it was branded as "Pyrosil Ware", but items destined for other countries were named "Pyroflam" instead.  Prior to the founding of the Dutch plant, American-made Corning Ware had been available in Britain, and these items bear the Pyrosil Ware mark as well.  Sometimes the logo includes "JAJ" as well as "Pyrosil".

Shallow 7 inch skillet with the typical square shape and Blue Cornflower decoration.  It was made in the Netherlands, but sold in the United Kingdom.

Frequently Pyrosil Ware was decorated with the same Blue Cornflower emblem that North American Corning Ware is, but this pattern does not appear on Pyroflam.  Instead, a design of six blue leaves is found on most Pyroflam items.  Other patterns like Spice O' Life and Country Festival can be found with the Pyroflam brand too.  Pyrosil Ware also exists with a Black Trefoil decoration.

Corning Ware is still sold in Europe as Pyroflam, but it is manufactured in France now.  Visions cookware is made in France also, but in Europe it is known as "Pyroflam Amber".


Related Articles: 

What are glass-ceramics? 
Corelle Profile: Blue Cornflower

Sources:

The Generations of Corning, Davis Dyer and Daniel Gross
Pyrex: The Final Meltdown, Phil Fairclough