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Film development uses different chemicals depending on the film and process. Black-and-white negative film typically needs developer, a stop bath or rinse, fixer, and water washes; color-negative film uses color-process chemistry such as C-41; slide film uses a reversal process; and motion-picture color negative may use ECN-2. These chemistries are not interchangeable, so match the products and instructions to the exact film.
What chemicals are used for black-and-white film?
For ordinary black-and-white negative film, the main chemicals are developer and fixer. A stop bath—or a water rinse used as a stop—is used between them. After fixing, the film is washed, and a wetting-agent rinse may be used at the end to help it dry evenly.
What each chemical does
- Developer: Converts the exposed silver-halide crystals into a visible image. Kodak lists XTOL, D-76, HC-110, and T-MAX developer as examples for its black-and-white films.
- Stop bath or rinse: Halts development before fixing. Kodak’s cited procedure uses a 30-second rinse or stop bath.
- Fixer: Removes unexposed silver halide so the image is no longer light-sensitive.
- Wash: Removes residual processing chemicals. Kodak’s cited procedure includes a five-minute wash.
- Optional wash aid and wetting agent: Kodak notes an optional hypo-clearing-agent wash aid and a 30-second final wetting-agent rinse in its procedure.
Those times describe the cited Kodak procedure, not a universal recipe. Development time and other steps depend on the film, developer, fixer, and their instructions. Kodak calls its published development times starting-point recommendations and advises testing for the best time for a particular application. See Kodak’s black-and-white film processing technical data, revised March 2023.
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No. Color-negative film uses color-process chemistry rather than the ordinary black-and-white developer-and-fixer workflow. The process may include color developer, bleach and fixer, or a combined bleach-fix, followed by a final rinse or stabilizer as specified for the process. C-41 is a common still-film process, but the exact chemicals and instructions must match the film and kit.
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- Compatibility: Suitable for all photographic chemicals including developer, stopper and fixer.
- Material: HDPE
- Package: 3x Chemical Storage Bottles + 3x stickers
- Dimension: 23.5 x 7 x 7 cm/9.25 x 2.76 x 2.76 inch
- Weight: 86g/0.19lb
Kodak’s chemical guidance distinguishes C-41 and RA-4 color developers from black-and-white developers and identifies bleach, fixer, bleach-fix, and final-rinse categories. It does not establish a complete home C-41 sequence here, so use the current instructions supplied with the exact film and chemistry rather than treating these categories as a recipe. Kodak EKTACOLOR Chemicals manual.
What chemicals are used for slide film?
Color reversal, or slide, film uses an E-6 reversal workflow, not the standard black-and-white process. Kodak’s EKTACOLOR manual search text names stages including first developer, reversal bath, color developer, pre-bleach, bleach, fixer or bleach-fix, and final rinse or stabilizer. The names alone do not establish the full sequence, bath count, or working formulas; follow the current kit documentation for the specific film and process.
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- Package included: 1. Timer clock x1 2. Chemical bottle x3 (color in black or white, send in random.) 3. changing bag x1 4. Rubber gloves x3 5. Film canister opener x1 6. 120 135 developing tank with 2 spiral reels x1 7. 1000ml plastic measuring cup x2 8. 50ml plastic measuring cylinder x1 9. 25ml plastic measuring cylinder x1 10. Thermometer stirrer x1 11. 10x loupe magnifier
- The developing tank and spirals can be accommodated the 2 rolls of 135/35mm films at a time or 1 roll of 120 film, made of unbreakable plastic, the spiral reels compatible with Paterson and other tanks on the market.
- The timer clock have 3 independent channels can be started independently or simultaneously, clock in HR/MIN/SEC, AM/PM format. timer not include battery
- The chemical bottle have wide bottle mouth, suitable for all photographic chemicals including developer, stopper and fixer. The 10x magnifier loupe, it's more clear, high contrast, and let you see more details.
- Note: Thermometer not include battery. these darkroom kit suitable for photography foundation buyer but it also suitable for beginner if you don't know how to use these darkroom kit please contact us, we will do my best to help you, we already equip correspond instruction for developing tank.
What about motion-picture film?
Kodak recommends controlled ECN-2 processing for optimum performance of its color-negative motion-picture films. ECN-2 is a specific motion-picture process, not a general recipe for still-camera color film. Kodak also lists specialized black-and-white motion-picture chemicals such as reversal first developer, redeveloper, clearing bath, reversal bleach, and rapid fixer; these are not a list of baths required for every black-and-white film. Kodak provides motion-picture processing information and a black-and-white kit chemical list.
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Start with the film’s process designation and use chemistry explicitly intended for that process. A product name or a chemical’s broad purpose does not prove compatibility with every film. Check the film data and chemical instructions for bath sequence, time, temperature, dilution, and whether working solution is one-shot, reusable, or replenished.
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- One gallon mix is in powder form and must be mixed with water before use
- You'll find it an excellent choice for almost any general photo application
- For normal or push processing
- For general use in developing black & white negatives
For example, Kodak’s current HC-110 product page says one liter of concentrate makes 32 liters of one-shot Dilution B working solution. That is a product-specific dilution statement, not a general dilution rule for developers. Kodak HC-110 / High Concentrate B&W Film Developer.
Safety, disposal, and the option of a lab
Read the safety data sheet (SDS) for each product before mixing or using it, and follow its handling and disposal guidance along with local waste rules. Disposal requirements can differ by chemical and location; do not assume every solution can be poured down a drain. Kodak’s processing information page points users to product safety data sheets.
Home processing means obtaining compatible chemistry and the equipment to measure and handle it; Kodak’s black-and-white technical data includes small-tank processing. If you would rather not handle chemicals, a film-processing lab is an alternative. Confirm that a lab accepts your film type and process before sending it.
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