Safe Lighting for Darkroom Photography: A Beginner's Guide

Welcome to the darkroom! One of the most crucial aspects of successful black and white photography is understanding and correctly using safe lights. These seemingly innocuous lights can be the difference between a beautifully developed print and a sheet of completely exposed paper (or ruined film!). This guide will walk you through the basics of safe lights and how to use them to protect your photographic materials.

What are Safe Lights?

Safe lights are specially filtered lights designed to allow enough illumination for you to see inside the darkroom while minimizing the amount of light that exposes your photographic paper or film. Standard room lighting, even seemingly dim light, contains wavelengths that will fog your materials. Safe lights filter out those problematic wavelengths. Understanding the materials you're using is vital – for instance, knowing the best paper for your project will significantly affect your process.

A darkroom illuminated by a red safe light.

Types of Safe Light Filters

Safe light filters come in various colors, the most common being amber, red, and red/green. Historically, red safelights were widely used for black and white paper, while red/green were used for film. However, modern photographic papers and films are often less sensitive to red light. The “safest” option now is often a red/green filter, or even a high-quality amber filter, due to the increasingly fine grain of modern materials. Always check the manufacturer’s recommendations for your specific paper and film stock. The choices seem endless, but ultimately, ensuring you're using the right choosing the right darkroom paper can save you time and frustration.

Exposure Times and Safe Lights – The Critical Factor

Even with a safe light, there’s a limit to how long you can have them on. Each safe light has a specified 'exposure time' – the maximum time it can be illuminated before your materials start to fog. These exposure times are typically measured in hours. For example, a safe light might be rated for 10 hours of continuous use with a specific type of paper. Crucially, exposure time is not additive. If you use two safe lights, their exposure times are *not* doubled.

The rating on a safe light is based on ideal conditions. Things that can shorten the safe light's exposure time include: