Cyanotype bookmarks, photobooth type Made in Occitania, more precisely in the Lot (46) ▫️ Length : 185 mm ▫️ Width: 50 mm ▫️ Paper: 300g, torchon grain 📘 The cyanotype is an old photographic process, thanks to which we obtain a Prussian blue photographic print, cyan blue. This technique was developed in 1842 by the English scientist John Frederick William Herschel. There are large variations of cyan ranging from very light to very dark. 🔖 Delivered in tissue paper and kraft envelope. Combined delivery possible