Wetenschap - 7 juni 2016

Researchers make special farewell photos of the Dreijen

tekst:
Rob Ramaker

Researchers of the chair group of Bionanotechnology have captured the Dreijen in a unique way. With a photographic technique they show how the sun constantly raises higher throughout 50 days.

Photo: Vittorio Saggiomo, Sander Baas, Jan Bart ten Hove

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In the last Resource a photo serie of the vacant buildings of the Dreijen was already shown. Although, from September research will still take place, but the last researchers are leaving the plac esoon. Moreover the Biotechnion will be demolished. Also the university lecturer Vittorio Saggiomo plus Sander Baas and Jan Bart ten Hove made a photographic tribute to the Dreijen with the so named solargraphy.

Saggiomo explains how it works: you take a beer can in which you place light sensitive paper. Then you puncture a small hole in it, and you place it somewhere for a couple of months. The whole works as a pinhole camera, without a lens. Afterwards you can use a scanner to convert the negative into this image type.

For the researchers the resulting photos also raised some scientific questions. Why do black and white films for example also produce coloured images? Saggiomo suspects that this resulted because of the ingredients of silver nitrate change colour after long exposure. He is now researching if this is correct.


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