Bell jars can be described as type of glassware which has an open bottom and a rounded top. These bell jars have many uses and most popularly it is used for creating a vacuum for any type of scientific experimentation or any device. This jar is supplied by most scientific supply stores in an extensive range of sizes and you can opt for a bell jar which is best suited to your needs and budget. There are a number of features that should be included in the quality glass jars and special care must be taken by you when using them. You must make it a point to inspect the bell jars properly so as to ensure their workability.
The first thing you need to do when you receive any new order of the glass bell jars is to inspect if the jars have incurred any shipping damage. You should not worry about small bubbles or scratches however, but, if you find any major damages in the jars then you need to contact the supply company immediately. Make sure you clean the jar surface from time to time and you can definitely use any commercial glass cleaner. Also, remember to wash the cleaner away completely using water as it can cause clouding in the inner surface. Also, it is quite a chance that your jar might develop some cracks due to usage age and it is not advisable to ignore such cracks for a long period of time. If you observe that a direct line is visible where the crack has developed on the jar then you should avoid using that particular vacuum jar. Cracking, impact impressions and clouding tend to make the bell jar quite unsafe for usage.
So, in a nutshell, you need to take proper care and follow the safety precautions for ensuring that your bell jars used for creating a vacuum chambers last much longer.