WHITE PAPER Figure 4. Detector measurements in relation to test piece size and shape Conclusions The results show that, even without the additional inter ferences of product and packaging, the detectability of metal detectable plastics varies greatly. None of the samples from Supplier 2 were detectable and even the best detected metal detectable plastics (Vikan) needed to be over 7 times the size of the iron sample to generate a similar reading, i.e. an 11 mm round piece of metal detectable plastic was required to generate a similar detection signal to a 1.5 mm round piece of iron. The detectability of different metal detectable plastics - Discussion If the use of metal detectable plastic equipment is deemed necessary through risk assessment, the selection of equipment made of approp riately detectable materials is essential to minimise the foreign body risk from this source. As an alternative (and even in addition to the use of metal detectable plastic equipment) it is suggested that tools and utensils are regularly inspected and replaced, in order to minimise the risk of foreign body contamination from this source, and that equipment which is of a contrasting colour to the food product be used to enable the plastic fragments to be seen more easily in the product. Vikan metal detectable tools are available in 5 different colours to facilitate this. STUDY 2: THE DETECTABILITY, DURABILITY, FUNC TIONALITY AND CLEANABILITY OF METAL DETECTABLE PLASTIC BRUSH BRISTLES One source of foreign body contamination is food industry cleaning brushware, where the bristles can snap, be cut, or detach from the brush head and enter the food product. Brushes with metal detectable plastic bristles are available to the food industry and have been marketed as a way of detecting foreign bodies from this source, but do they work? The purpose of the second study was to investigate the metal detectability, durability, functionality and cleanability of metal detectable brush bristles. Vikan A/S - Department of Research & Development 3 Copyright © 2021 Vikan A/S · All Rights Reserved
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