darkroomFYI

A darkroom chemistry knowledge base and lab manager. Browse chemicals, recipes, and techniques for film developing and printing.

Features

Chemical database with safety and handling information, plus links to NIST WebBook and PubChem (NIH) when available
Film and paper developing recipes with mixing instructions
Technique guides for darkroom processes
Full-text search across all content
Safelight mode — red-only display with adjustable brightness for use in the darkroom

For Registered Users

All chemicals, recipes, and techniques are freely available without an account. Registered users get access to additional features:

Darkroom journal — log your sessions, notes, and results
Chemical inventory — track what you have on hand and shelf life
Saved favorites — bookmark recipes and techniques for quick access

Create a free account to get started.

Sister site: photographyFYI — film photography knowledge base with cameras, lenses, film stocks, and technique guides.

Safelight Mode on iPhone

The Safelight button in the nav bar switches the display to red-only light. For the best experience on iPhone, you can also enable iOS Color Filters to turn the entire screen — including the status bar clock and icons — pure red:

Set up the filter: Settings → Accessibility → Display & Text Size → Color Filters. Turn on, select "Color Tint", drag Hue all the way to red and Intensity to maximum.
Add a shortcut: Settings → Accessibility → Accessibility Shortcut (at the bottom). Check "Color Filters".
Toggle it: Triple-click the side button to instantly switch the color filter on or off.

This stacks with the in-app safelight mode for a fully red display with no white light leaks.

Note: Safelight mode is experimental and is not guaranteed to be safe for any given black-and-white paper. Always test with your specific materials before relying on it in the darkroom.