Preforms can be injection molded, extruded, or otherwise formed into the desired shape. Testing defects in preforms is important because it can help to identify problems with the manufacturing process by using a polariscope strain viewer. Defects can cause problems with the final product, such as poor appearance, dimensional inaccuracies, or functional issues. Testing can help to identify these defects so that they can be corrected. If you want to know more about this polariscope lab testing equipment then you can give a call at +91 9210903903 or email at [email protected] and also you can know the polariscope price. The team of technical experts at Presto will easily consult you regarding all your needs and queries.