Analysis Of Cord And Stones In Glass

Glass containers are used successfully throughout the world for foods, beverages, spices, wines, liquors etc. Depending on the type of product, glass containers can be subjected to a variety of loads such as internal pressure, thermal shock, impact or vertical load during normal filling operations and use. Each load causes deformations of the container which leads to the creation of stress in the glass. Usually, these stresses can be endured without any problems. However, on rare occasions, unusual conditions known as cord streaks and stone inclusions can be present in the glass which might adversely affect container performance. This paper discusses how these conditions can be analysed to find the source of potential problems.