What will happen if & when we have used very old nylon cord?

CAL’s nylon cords for mowing contain enough water to maintain the strength. (It’s an one of the production process called “humidity control”)
When using the nylon cord left over from last season, you may feel it tightly hard a little. This is a state of water loss due to long-term inventory.
It is convenient to remember that it will get back to the close state at the time of shipment just by soaking it in hot water prior to the use.