X-ray thread
It is not possible in some sectors to work with metal detectors. For example, this is the case where products are packed in aluminium packaging. The solution here is to use an x-ray detector. Foreign objects can be detected by this system where their density is greater than that of the product, including its packaging.
The Detectaplast ® X Ray plasters contain a thread of barium sulphate that is detectable by an X-Ray detector and can be removed immediately from the food chain. Barium sulphate is regularly used in healthcare as a contrast when making x-ray images.