Developing colour film at home
Many people develop black and white film at home, but the vast majority of them have never developed colour film at home. In reality, developing colour film is almost as simple as developing black and white film.
The one thing that matters is temperature. Colour chemistry gives its best result at the temperature it was designed for.
38°
C-41 developer, target
For most C-41 chemicals this is the temperature. If it rises, AGO shortens the development time. If it drops, AGO lengthens it.
Nothing terrible happens at 4 or 5 degrees off
Larger deviations will start to affect how the colours look. This is the main reason why most people still take their film to a lab and do not trust themselves to experiment with colour.
In reality, nothing terrible happens if your development varies by 4-5 degrees. Yes, you may not get a completely perfect result, but there is also nothing wrong with your pictures because of it.
Most people who develop colour film at home today use sous-vide and a thermometer. They reach exactly 38 degrees and do all their steps in a water bath. The results are perfectly satisfactory.
Why use AGO for colour film?
AGO gives you a level of accuracy that you cannot achieve with sous-vide and a thermometer alone. It also removes the need to constantly monitor the temperature, stare at the timer and agitate your film at exactly the right time.
AGO continuously monitors the temperature inside the tank and knows exactly what the temperature is at any given moment. Agitation keeps running the whole time. The result is more consistent and more precise than what you would have achieved manually.
What is the best way to develop with AGO?
You heat the chemistry and pour it in. AGO handles the timing, the agitation and the temperature from there.
Heat your chemistry
Sous-vide or warm water from a boiler both work. You can heat the chemistry in a water container or in your home sinkNever pour developing chemistry down the sink. Used chemistry needs to be collected and then disposed of correctly. Follow the guidelines of your home country.. Bring it to 38 to 40 degrees. With AGO you can safely go 1 to 2 degrees higher, because the temperature drops during development.
Preheat the tank
Pour the preheating water into the Paterson tank and run the HEAT step.
Run the developer
Once the tank is warm, move to the DEVELOPER step. AGO starts developing.
AGO follows the temperature
AGO tracks the chemistry at every moment and compensates the time accordingly. You can still get a good result if the chemistry is 34 degrees when you pour it in. If it sits outside the range, AGO does everything it can to make your pictures come out as well as possible.
Why is AGO great for colour film?
You get a more accurate result than when developing colour film manually.
AGO gives you confidence that your developments will consistently come out well.
You do not need to worry about whether the temperature stays exactly at 38 degrees. If it rises or falls, AGO compensates for the deviation and helps you achieve the best possible result.
You do not need to watch the timer or agitate your film at exactly the right times. AGO does it for you.
AGO knows what the next process step is and helps you make the right moves at the right time.
You can develop all your film yourself. Black and white, colour film, positive film or something else.
What AGO does not do
AGO does not heat your chemistry. The chemistry needs to be preheated first, using hot water from a boiler or sous-vide.
AGO does not pump the chemistry in and out by itself. AGO lets you know when the used chemistry needs to be poured out and new chemistry poured in.
AGO vs manual processing
| AGO Film Processor | Manual tank processing |
|---|---|
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Active Time Compensation adjusts for temperature drift automatically
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Constant water bath monitoring, stress if temp drops
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Continuous rotary agitation, hands-free
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Hand inversions every 30-60 seconds for the entire process
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24+ built-in programs and list keeps growing, fully customizable via WiFi
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Calculate times and steps yourself for each chemistry
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B&W, C-41, E-6, ECN-2, and RA-4 out of the box
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Most home developers stick to B&W only
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Up to 60% less chemistry per roll
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Full tank chemical volumes every session
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Process film, prints, Super 8, and large format. One device, every format
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Limited to 35mm and 120 with standard tanks
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OTA firmware updates add new chemistry profiles
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Your process never improves
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Pour in chemicals, press start, walk away
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Stand over the sink for 15-30 minutes
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I just set it to work and do other things, coming back to the beeping sound to replace chemistry.
— AGO owner review
AGO is not only for C-41
If you have read this far, there is one more important thought we want to leave you with. AGO does not stop being useful here. AGO is your lab assistant for the whole of film photography.
Processes
C-41 colour film
E-6 slide film
ECN-2 cine film
RA-4 colour prints
For your walls, as gifts or for your archive.
Formats
110
35mm
120
4×5
5×7
9×12 cm
8×10
Super 8
If you want to develop colour film at home without worrying about every small temperature change, AGO helps you get through the whole process more simply and with more confidence.
Award-winning design
Modern film development starts here
AGO is a compact film processor for photographers who want precision without the hassle. B&W, C-41, E-6, ECN-2, and RA-4. Works with all Paterson tanks, from 35mm to 8x10. Uses up to 60% less chemistry.
Active Time Compensation
AGO monitors your chemistry temperature throughout the entire process and automatically adjusts development time if it shifts. No stress, no guesswork. Perfectly developed film, every time.