- Safelight
- Special darkroom illumination with filtered light, usually red or amber, whose wavelengths lie outside the sensitivity of certain photographic papers and thus permit brief work in the light[4][5][6].
- Stop bath
- Mildly acidic solution that halts the development process within seconds by neutralizing the alkaline developer and thereby freezing image formation exactly[1][2].
- Fixer
- Chemical that dissolves unexposed silver halides, renders the image light stable in 2 to 5 minutes and only then releases it safely from the darkroom[1][2][3].
- Ilford method
- Washing procedure in which the tank is filled with water and inverted 5, then 10, then 20 times to remove developer and fixer residues efficiently from the material[1][2].