The Prado Museum (https://www.museodelprado.es) inaugurates “Mascaras”', organized in collaboration with PhotoEspaña. This is an exhibition of 18 photographic portraits of Alberto Schommer, a very good Spanish photographer. The portraits are simply amazing. Many of them have the peculiarity that there are no eyes. As an example, look at the Rafael Alberti portrait. It has been made with traditional Black and White film. Can someone suggest how it can be done?