Darkroom chemistry tracker
Keep tabs on how many rolls each bottle has left and how fresh it is. Everything is saved in your browser — nothing leaves your device.
About this tool
This tool keeps track of your developer and fixer: how many rolls each bottle has processed against its capacity, and how fresh it is against its shelf life. It warns you when a bottle is exhausted or expired, so you never develop on dead chemistry. Everything is saved in your browser.
How to use it
- Enter a bottle name, mixing or opening date, shelf life, capacity and rolls already used.
- Press Add bottle to save it to your list.
- Tap +1 roll after each film to count it down.
- Watch for the low and replace warnings before your next session.
FAQ
Where is my data stored?
In your browser local storage on this device only. It is not uploaded, but clearing site data will remove it.
How do I know a developer is exhausted?
When rolls used reaches capacity, or the shelf life passes, the tool flags it to replace. Always confirm with a clip test for fixer.