The author describes his lensless photographic technique which he calls the chemigram technique. His research, in which chance plays an important role, is characterised by a displacement of the values of each step in making a photograph. Usually, a photograph is produced through exposure to light, and the subsequent chemical operations contribute only to making the latent image permanently visible. But, for the author, the latter become the generator of the image. Light takes on a secondary role. The essential elements in his work are: photosensitive materials, chemical solutions and localizing materials. The techniques are para-photographic; they are more related to engraving, painting, lithography, etc. than to photography itself.