noun
hypo
Sodium thiosulfate used to fix photographic images.
The photographer prepared a hypo fixing bath.
Etymology
Hypo shortens hyposulphite, an older chemical name used for the fixing agent. Photography retained the shortened name after sodium thiosulfate became the preferred chemical designation.
More examples
- The old darkroom manual specified hypo for fixing the print.
- A container of hypo stood beside the developing tray.
- The archival note discussed removing residual hypo from photographs.
Forms
hypo
Similar words
- fixer
- Fixer is the photographic solution that makes an image permanent; hypo names a chemical used in such solutions.