1000 Piso

The 80/20 cotton-abacá blend used in Philippine banknote paper is not merely a nod to local agriculture — abacá fiber genuinely improves tensile strength and resistance to folding, which matters considerably for a high-denomination note in heavy transactional use. The Philippines is the world's dominant abacá producer, and the BSP has incorporated local fiber into its paper stock for decades, making it one of the few central banks manufacturing notes from a domestically grown raw material.

The Security Plant Complex has handled Philippine note production since 1978, ending decades of reliance on foreign printers. For a 2022 issue at this denomination, the watermark listing as the sole cited security feature almost certainly reflects incomplete cataloguing rather than the actual specification.