• The cardboard core generally has crush resistant constraints to withstand the weight of winding of the metal (resistance to high pressure on the cardboard core).
• Thickness is important and can vary according to the regularity of the winding tension.
•The cardboard core protects the wound metal from markings during winding or handling.
•This means it can be very thin (min. 1.5mm), so it can be delivered and stored folded.
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