Print Washer

Overview

Washing is the step that decides whether a print survives. Residual fixer in the paper base slowly converts to silver sulfide and the print stains brown and fades — over years, invisibly, and irreversibly.

A print washer works by keeping water moving past each sheet separately. A stack of prints sitting in still water will not wash: the fixer diffuses out of the paper into a thin boundary layer and then stops. The washer's separator slots and its water flow keep replacing that boundary layer.

The specification that matters is capacity with separation, and whether the water inlet reaches the bottom of the tank so fresh water enters where the fixer is densest. A cheap washer with poor flow is worse than a tray with a running hose, because it gives a false sense of security.

What it does well

• Keeps prints separated so water reaches every surface
• Continuous flow replaces the fixer-laden boundary layer
• Cuts fibre-paper washing from an hour in a tray to 30 minutes
• Slots make it easy to keep track of which print is which
• A genuine archival necessity, not a luxury

Safety notes

Working notes

• Wash at 18–24 °C. Water colder than the chemistry causes reticulation; hotter water softens the emulsion.
• Use hypo clear before washing and halve the wash time without any loss of permanence.
• Do not stack prints in the washer without the separators — they will not wash and may stick together.
• Test your wash with a residual-fixer test kit once. It is the only way to know your routine actually works.

Compatible with