Potassium Iodide is one of the metal salts that can be used to salt collodion for used in wet plate photography.
Wear safety glasses and nitrile gloves when handling. IMPORTANT: Refer to material's safety data sheet (SDS) for additional safety and handling information. Use of this material is strictly at your own risk.
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Because the wet-plate lab deals with a wide variety of potentially hazardous materials, the first order of business is to learn about the materials, their hazards, and how to handle them safely.