glassine paper, 45 g/m², translucent, colourless, chlorine-free bleached, anti-static, archival safe, pH neutral, acid-free, open on two sides (one opening on the long side, one on the short), thumb-notch on the long side, the two open edges are rounded, width side is glued by means of a fold wrapping around the outside (paper reaches completely to the bottom – no glued area in the way)