This is our new fancy homemade UV-exposure unit – it has an array of eight 20W Sylvania Blacklight 350 BL UV-tubes in it. All the credits for building it will go to Olli, our school’s janitor, who is also a skillful electrician.

To quickly test a new exposure unit I grabbed a sheet of Emaks photographic paper (made in Yugoslavia) – the package was badly outdated and light-leaked some 20 years ago – and contact printed the negative from the previous lith session.

The result was a pink, low contrast printing-out image. We will need much more contrasty negatives to get photographic full and pleasing tone scale (if that is at all possible). Also, we may need to explore if we can find an inkjet hue that will block the UV-light better still, to achieve pure white highlight tones.

Contact print from a digital negative on Emaks K883 paper, exposed to UV-fluorescent light for 1,5 hours. No development, normal fixer and wash.

Prints like this (contact printing with UV, no development) are often referred to as “POP” (Printing Out Paper) or “Lumen Printing”. Maybe we’ll classify them here as Lumen, because we’re going to continue using combinations of photograms and overly contrasty negatives to produce variety of colored and toned prints on outdated photographic papers (which seems to be what Lumen process is good for).

Here the same print was toned in Berg Selenium Toner, diluted 1+10, for 5 minutes, to achieve more neutral print tone.