Lumen prints
![](https://www.italianfilmphotography.it/wp-content/uploads/2015/06/asciugatura-100x150.jpg)
The simplest “photographic” techniques are those that involve contact printing, where the external light is used in place of the enlarger: at
The simplest “photographic” techniques are those that involve contact printing, where the external light is used in place of the enlarger: at