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“Put the box in the right place. Measure the light (we used an old gossen lightmeter). Calculate the right time according to the diameter of the hole and the ASA of your paper. Open the hole. Get a coffee and wait. Development is a bit tricky. We did it at the place and with the help of Hamburg based photographer Matthias Hewing who learned all the chemical stuff a few decades ago.”
via whudat.
