prov:value
| - It is preferable that the fixer and the bleaching fixing agent contains a preservative, such as a compound for discharging sulfurous acid ions, such as sulphite (for example, sodium sulfite, potassium sulfite, ammonium sulfite or the like), bisulfite (for example, ammonium bisulfite, sodium bisulfite, potassium bisulfite or the like), metha bisulfite (for example, methapotassium bisulfite, methaso
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