Darkroom and Film Development Timer

thingiverse

Developing is just subjecting exposed film or paper to a series of chemical reactions. It involves "developing" which brings out the exposed image, "stopping" which halts the chemical reaction of developing to freeze the image, and "fixing" which removes light sensitivity from the medium so it can be viewed in normal light. All chemical reactions are sensitive to quantity, temperature, and time, and different films and developers have different developing time requirements. Develop for too long or too short a time and it changes the quality of the image. There's a niche category of darkroom timer apps, but I had two key issues with them. First, some offer a "darkroom" mode that turns the interface all red, but that doesn't stop notifications or accidental swipes from interrupting and causing exposure mistakes. And second, darkrooms are wet areas because of the chemicals. That doesn't play nicely with phones. So, I decided to build my own solution!