The films are sensitive to UV light. Processing in subdued room-light (ideally yellow light) is possible. However, it is essential to avoid direct sunlight and prolonged storage in an illuminated room. Sunlight destroys the light sensitive diazo coating in a short time.
Please follow the special handling instructions (instruction sheet).
Processed films: normal room condition in filing cabinets.
Unprocessed films: Cool (15-20°C) and dry (less than 60% humidity) - in a sealed package and protected from light and ammonia.