Photographers' Formulary 10g Aluminum Sulfate Photographic Hardener

Key Features

• Achieve superior image quality with this effective photographic hardener.
• Use as a substitute for alum; just use 2 parts aluminum sulfate for every 3.
• Extend your prints' archival properties; protects your cherished memories.
• Enjoy ease of use with these colorless crystals; simple to measure and mix.
• Ensure consistent mixing for reliable results in your darkroom chemicals.
• Photographers' Formulary Aluminum Sulfate offers excellent shelf life.