Which of the following combinations cause the films to smell and turn yellow over time?

• A. Cold wash water solution and poor water circulation
• B. Cold wash water solution and weak fixer solution
• C. Weak fixer solution and poor water circulation
• D. Cold wash water solution, weak fixer solution, and poor water circulation

Answer: (A)

The issue tested is how washing conditions after development affect residues that cause odor and staining on film over time. When wash water is cold and circulation is poor, the washing step becomes ineffective at removing residual developing chemicals from the emulsion. Cold water slows diffusion, so the chemicals linger longer, and poor circulation means the water isn’t being refreshed or moved across the film surface to carry away those residues. Over time, these leftover substances can give off a smell as they break down and can leave yellowish staining from chemical residues depositing in the emulsion. While weak fixer can cause its own problems related to incomplete fixing and potential discoloration, the combination that best explains both smell and yellowing due to inadequate washing is cold wash water paired with poor water circulation. To prevent this, ensure wash water is adequately warm to promote diffusion and that there is sufficient circulation to effectively remove residues from the film during washing.