Silicone oil is a lubricant which dissipates without trace. The thread slippage through the needle improves and thread breakages can be reduced.
• Use BERNINA thread lubricator
Lubricating is not necessary: With easily sliding, tensile threads with smooth surface, e.g. polyester, cotton, rayon up to half a year old
Lubricating is recommended: With threads which are prone to break having a rough surface, e.g. metallic threads, rayon older than half a year Attention: When threads are lubricated using silicone, it may be necessary to increase the upper thread tension.