115 g/m² paper. Tamper-proof thanks to the watermark, printed reactive inks, the nature of the design, and the security thread of microtexts that render any photocopy of the original unusable. Paper composed of 25% cotton ensuring good durability over time. Pack of 70 sheets, size 21 x 29.7 cm (A4). Color: blue/turquoise helicoidal.