Luminarc 22Cm Luminarc Glass Salad/Fruit Bowl - Transparent.

Good tempering makes Duralex stronger but also durable - this is the tempering process.
It consists of a sudden cooling by ventilation of cold air on the whole of the glass product which was previously brought to a temperature of about 700°c. 
This treatment creates, in the glass, controlled pressures that improve most of its physical qualities: resistance to mechanical stresses (bending, shocks) and thermal shocks. 2.5 times stronger than an annealed glass product and able to withstand 130 ° C heat shock, our products are easily passed from the freezer to microwaves. 
Directions for use: – Wash before use –Do not use in the oven. – Do not expose the products to flames. – Do not subject the products to a sudden temperature change of more than 130°C. -Do not use a damaged or chipped product (risk for the user). - Avoid scratching the surface of the products.