Quick answer
Mix Kodak Professional Fixer by dissolving the powder in warm water, adding cold water to reach one gallon, and stirring thoroughly. Use a clean container and store the mixed solution in a tightly sealed bottle.
Why proper mixing matters
Incorrect mixing can lead to under-fixed negatives that fade over time or over-fixed film that loses detail. Kodak Professional Fixer is a concentrated powder that must be fully dissolved before use. Always follow the exact water temperature and volume specified on the package.
What you need
You need a clean 1-gallon container, a stirring rod, and access to warm (not hot) tap water. Avoid using metal utensils or containers that may react with the chemicals. A dedicated darkroom funnel helps prevent spills.
How to mix Kodak Professional Fixer
- 1. Prepare your workspace: Set up in a well-ventilated area with a clean, dry surface. Gather a 1-gallon container (glass or HDPE plastic), a stirring rod, and a funnel. Avoid using the same container for other chemicals to prevent cross-contamination. Use a dedicated container for fixer only.
- 2. Add warm water: Fill the container with about 750 ml of warm water at 32-43 °C (90-110 °F). Do not use boiling water as it can cause the powder to clump or degrade the chemicals. Water too hot can damage the fixer; too cold slows dissolution.
- 3. Add the powder slowly: Pour the entire contents of the Kodak Professional Fixer packet into the warm water while stirring continuously. Add it gradually to avoid forming lumps. Stir for 2-3 minutes until the powder is fully dissolved. Undissolved powder can cause uneven fixing and spots on film.
- 4. Top off with cold water: Add cold water to bring the total volume to 1 gallon (3.8 liters). Stir gently for another minute to ensure even mixing. Do not overfill. Check the container's fill line or use a measuring jug for accuracy.
- 5. Store the mixed fixer: Transfer the mixed fixer to a tightly sealed, opaque bottle. Label it with the date and type of chemical. Store in a cool, dark place away from heat sources. Mixed fixer typically lasts 2-3 months in a full, airtight bottle. Always seal the bottle after each use to prevent oxidation.
Product details
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Kodak Professional Fixer - Makes 1 Gallon: This product is only available for Store Pickup only as we are not able to ship photographic chemicals. Plan your purchase ahead and pick it up in-store; you cannot have it delivered. This is common for darkroom chemicals due to shipping restrictions.
Kodak Professional Fixer - Makes 1 Gallon
