The 4-flap pocket is made of a single sheet of paper made of pure cotton fiber, without adhesives, without adding chemicals, unbuffered, of the highest quality.
The paper is manufactured in the factory by a so-called "round form" machine.
The vegetable fiber is processed and pressed in a respectful way according to a specific calendering process, very porous precisely to allow a maximum of air flow in order to prevent any potential accumulation of harmful gases.
A double groove facilitates the folding of the 4-flap pockets.
Ideal for archiving glass plate negatives, this 100% cotton flap folder allows for safe long-term primary storage.
To consult these negatives, simply place them on a work surface or light table and open the 4 flaps without moving the pouch.
Characteristics : 100% pure cotton fiber. No alkaline reserve. pH 6.7 - 7.0. Non-calendered surface to allow more air circulation
Conforms to ISO 16245 type A standard.
Available in 60 x 90 mm, 90 x 120 mm, 100 x 150 mm, 122 x 167 mm, 130 x 180 mm, 180 x 240 mm, 210 x 270 mm and 240 x 300 mm
