Foto storie di un istante - "Gli inventori"

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playing with light to produce an image without painting long before the invention of photography we had the idea of projecting shadows to try to capture an image from reality in the 18th century we learned to fix it thanks to devices like this strange chair called a portrait drawing machine The shadow of the model is

projected onto a sheet of paper you just have to turn, cut it out and mount it all on a colored background [Music] Nobles and Bourgeois had their profile drawn in this way As it was said at the time a quick way to have a cheap portrait a step forward was made when you understood that the light itself could

draw or at least leave a mark in the Middle Ages the idea of coloring fruit thanks to the sole effect of the sun's rays was in vogue then it was enough to apply a mask on the fruit which as it ripened colored all around the area protected by the mask this property of

natural transformation under the action of light is what we call photosensitivity

some chemical elements such as silver nitrates also react to light by darkening But unlike the pigments of a fruit we can isolate them dilute them and spread it thus artificially photosensitive the first to have had the idea of ​​producing an image by exploiting the properties of silver nitrates was the Englishman Wedgewood who in

1802 created what he called photograms he placed butterfly wings on sensitized paper and exposed them to the sun for a few minutes the nitrate blackened the sheet the negative imprint of the butterfly This image obtained by contact is an image as short- lived as the butterfly itself because Wedgewood did not know how to stop the