This document describes darkroom illumination and how to properly use safelights to protect light-sensitive materials.
This guide explains how to safely use Kodak safelight lamps in darkrooms. It details filter types, bulb wattages, and safe distances for different photographic materials. Filters fade over time and must be replaced periodically. The guide also covers materials requiring total darkness and how to test safelight conditions.
Safelight filters are designed for specific materials and transmit only certain wavelengths. Bulbs must be replaced when they blacken. Placement should avoid direct illumination closer than 4 feet from work surfaces to prevent eye strain and uneven lighting.
| Recommended Bulb Wattage | 15-watt or 25-watt |
|---|---|
| Minimum Distance | 4 feet (1.2 metres) |
| Filter Type for Color Negative Papers | Amber (KODAK 13) |
A safelight is darkroom illumination that does not cause visible changes to light-sensitive materials when correctly handled and processed.
Filters should be replaced every three months if used 8 to 12 hours a day.
Panchromatic black-and-white films, color camera films, slide and print films, duplicating and internegative films, high-speed infrared films, color reversal papers, and color negative papers for Process RA-4.