Slide film is developed in a process called E-6, at 38°C, the same temperature as colour negative film. Kodak Ektachrome E100, Fujifilm Provia and Velvia all go through the same baths. What comes out of the tank is a finished picture you can hold up to a window, in full colour, with nothing to convert.
This E-6 developing guide walks you through the whole process, from choosing a kit to mounting your slides. The wet steps take about 30 minutes, and if you have developed colour negatives at home you already own most of the equipment.
Watch an E-6 run from start to finish
Here is a roll of Kodak Ektachrome E100 developed at home with the ADOX C-TEC E-6 kit on the AGO Film Processor, from mixing the chemistry to viewing the slides. Watching it once makes the written steps below much easier to follow.
How E-6 slide film development works (E-6 vs C-41)
Colour negative film is developed in a process called C-41. You get a negative with an orange tint, and software or a print turns it into a positive. E-6 gives you the positive directly, and it gets there in four stages.
The first developer is a black and white developer. It develops the silver wherever light hit the film and leaves the rest untouched. That's why this bath controls how bright your slides come out. The longer it works, the less silver is left for the colour step, so the slide comes out lighter.
Next, the silver the first developer skipped, the dark parts of the scene, is switched on so it can be developed. Some kits do this with a separate reversal bath, others do it inside the colour developer. The colour developer then develops that silver and builds the cyan, magenta and yellow dyes around it. Finally, bleach and fixer remove all the silver, leaving only the dyes. That's your slide.
Compared with C-41, there are two developers instead of one, and slide film forgives less. A negative that is a stop too dark can be rescued in the scan, but a slide is the final image.
Can you develop E-6 at home?
Yes, and the tank, reel and changing bag are the same ones you use for black and white or C-41. The hard part is the first developer. Kodak's standard for E-6 is 38.0°C (100.4°F), and the first developer has to stay within three tenths of a degree of that for about six minutes. A few tenths too warm or too cool and every frame on the roll comes out lighter or darker. After the first developer, everything is relaxed. The colour developer allows a degree or two, and the baths after it work across a wide range.
That one step is why E-6 has always been seen as lab work. The AGO Film Processor is what makes it dependable at home, and the next section explains how.
Temperature control for E-6 at home, and why the AGO matters
You can try to hold 38°C by hand. Stand the bottles and the tank in a tub of water held at temperature by a sous vide stick, lift the tank out to turn it, put it back, and watch a thermometer the whole time. The trouble is that a sous vide holds the temperature of the water around the tank, not of the developer inside it. Every time you lift the tank out, the developer cools, and a thermometer only helps while you are standing there reading it. Staying inside three tenths of a degree this way is very hard, and results tend to vary from roll to roll.
The AGO works differently. It doesn't heat the chemistry, so you still warm it to about 38°C first, and a little above is fine. Then it measures the temperature of the chemistry inside the tank through both developers and adjusts the time to match. If the developer has cooled, it runs longer, and if it's warmer, it runs shorter. It also rolls the tank at a steady pace, times every step and tells you what to pour next. In the video above, the tank read 36°C during both developers against the 38°C target, and the AGO lengthened the times to make up for it.
The AGO has a built-in program for every E-6 kit in this guide, so you open the E-6 menu, pick your kit and follow the screen. The list covers Adox, Arista, Bellini, Cinestill D6, Ilfocolor and Jobo. Temperature compensation works in horizontal rotary mode, which is the default. Hundreds of E-6 rolls have been developed on it.
Warm it once, let the AGO handle the rest
Use the sous vide to bring your chemistry up to temperature, and let the AGO take care of the drift once it's in the tank. The two work together. If holding the first developer within three tenths of a degree is what has kept you from trying slide film, this is the piece that solves it.
See the AGO Film ProcessorWhat you need to develop slide film at home
If you already develop C-41, you have most of this. Starting from nothing, this is the full list.
- Developing tank and reels. The Paterson System 4 range. Reels adjust between 35mm and 120 (medium format) film.
- Changing bag or changing tent. Loading the film onto the reel is the only step that needs total darkness.
- Thermometer. Digital, reading to a tenth of a degree.
- Measuring jugs and storage bottles. One jug and one labelled bottle per bath, so nothing mixes.
- An E-6 kit. Compared below.
- A heat source, such as a sous vide stick, the kitchen heater that clips to a tub of water and holds it at a set temperature.
- The AGO Film Processor, to keep the developer times right as the temperature drifts.
- Demineralised (distilled) water for the final bath. Hard tap water leaves chalky spots on slides.
- Film clips, one weighted, for drying.
- Scissors, nitrile gloves and safety glasses.
Which E-6 film developing kit to buy
Every kit below makes real E-6 slides, and the AGO has a built-in program for each of them. They differ in how many baths you pour and how much they make. Three-bath kits do the reversal inside the colour developer and combine bleach and fixer into one bath, called a bleach-fix or blix. Six-bath kits keep the original lab sequence, with separate reversal, pre-bleach, bleach and fixer.
| Kit | Baths | Capacity | Temperature | AGO program (E-6 menu) |
|---|---|---|---|---|
| ADOX C-TEC E-6 | 3 baths and a stabiliser | 1 litre, up to 12 rolls | 38°C | Adox |
| Bellini E-6 | 6 baths and a stabiliser | 1 litre, about 12 rolls | 38°C | Bellini |
| JOBO E-6 | 6 baths and a stabiliser | 2.5 litres, up to 40 rolls | 38°C | Jobo |
| Ilford Ilfocolor E-6 | 6 baths and a stabiliser | 2.5 litres, up to 40 rolls | 38°C | Ilfocolor |
| CineStill Cs6 | 3 baths | Single-use first developer, up to 16 rolls | 40°C | Cinestill D6 |
| Arista Rapid E-6 (US) | 3 baths, no stabiliser | 1 quart (960 ml), 8 rolls | 40.5°C (105°F) | Arista |
We stock the ADOX and Bellini kits, and the step-by-step below follows those two. ADOX C-TEC is the easiest first kit, with the fewest pours, about €4.50 a roll and push and pull times on the sheet. With any other kit, follow its own manual for the times and pick its program on the AGO.
Mixing E-6 chemistry
Mix the chemistry exactly as your kit's manual says. Every kit is different, and the manual always wins. Two rules apply to all of them. Mix the first developer first and close its bottle straight away, because a few drops of colour developer, or even its fumes, spoil it. And measure the colour developer parts carefully, because small errors shift the colours. For reference, these are the mixes for the two kits we sell.
| ADOX C-TEC E-6, 1 litre | Water | Concentrate |
|---|---|---|
| First developer (FD) | 800 ml | 200 ml FD |
| Colour developer (CD) | 600 ml | 200 ml Part 1 + 200 ml Part 2 |
| Bleach-fix (BX) | 600 ml | 200 ml Part 1 + 200 ml Part 2 |
| Stabiliser (STAB) | 800 ml demineralised | 200 ml STAB |
With ADOX, the mixing water can be anywhere from 20 to 45°C. To start straight away, mix about 10°C above 38 and let it cool. Fresh colour developer is violet and turns yellowish over time, which is normal.
| Bellini E-6, 1 litre | Water | Concentrate |
|---|---|---|
| First developer | 750 ml | 250 ml |
| Reversal | 900 ml | 100 ml |
| Colour developer | 700 ml | 250 ml Part A + 50 ml Part B |
| Pre-bleach | 900 ml | 100 ml |
| Bleach | 490 ml | 510 ml |
| Fixer | 900 ml | 100 ml |
| Stabiliser | 990 ml | 10 ml |
How much E-6 chemistry one run takes
If you turn the tank over by hand (inversion), the liquid has to cover the whole reel. The AGO rolls the tank on its side, so it needs much less. These are the volumes for each Paterson tank.
| Paterson tank | Rolls (35mm / 120) | By hand | On the AGO |
|---|---|---|---|
| 1-reel tank (PTP114) | 1 / none | 290 ml | 250 ml |
| 2-reel tank (PTP115) | 2 / 1 | 590 ml | 350 ml |
| 3-reel tank (PTP116) | 3 / 2 | 900 ml | 450 ml |
| 5-reel tank (PTP117) | 5 / 3 | 1,500 ml | 650 ml |
| 8-reel tank (PTP118) | 8 / 5 | 2,400 ml | 950 ml |
The AGO volumes are the minimums from our chemical volumes chart. ADOX recommends developing no more than two films in a tank at a time, to keep the baths from contaminating each other.
How to develop E-6 slide film, step by step
This sequence follows the two kits we sell. Steps 1 to 4 are shared, with the small differences noted in each step. After the first developer the kits split, so follow step 5A for ADOX or 5B for Bellini and then carry on from step 6. On the AGO, open the E-6 menu and pick Adox or Bellini, and the screen walks you through the same steps.
Before you start
Mix the chemistry into labelled bottles, first developer first. Lay out the tank, reel, scissors, thermometer, jugs and bottles. Once the first developer goes in there is no pausing until the colour developer is out, so have everything warm and in order.
The time for every step runs from the moment a bath touches the film until the next one does. Pouring out counts as part of the bath you are emptying, so start pouring a few seconds before the time is up.
Warm the chemistry to 38°C
Stand the bottles in the water bath until they reach 38°C, checking with the thermometer in the bottle, not in the water. The two developers matter most. The bleach, fixer and stabiliser only need to be warm.
15 to 30 minLoad the film in the dark
In the changing bag, open the film cassette, cut off the narrow strip at the start of the film (the leader) so the end is square, and feed the film onto the reel. Drop the reel into the tank and put the lid on. From here on you can work in normal room light.
About 1 min
Pre-heat the tank
A cold tank cools the first developer in its first few seconds, and in E-6 those seconds show. With ADOX, fill the tank with 38°C water for 2 minutes and pour it out. The water may come out coloured. That's the anti-halation layer, a dye coating on the film, washing off, and it is normal. With Bellini, keep the tank dry and stand it in the 38°C bath for 3 minutes instead.
2 to 3 minRun the first developer at 38°C
Pour the first developer in quickly and tap the tank on the counter to knock air bubbles off the film. The AGO starts rolling the tank and counting down on its own. By hand, you agitate, which means moving the tank so fresh developer keeps reaching the film. With ADOX, turn the tank over gently for the first 30 seconds, then once every 15 seconds, putting it back in the water bath in between. With Bellini, agitate for the first 15 seconds, then for 5 seconds every 30 seconds.
The time is 6:15 with ADOX. Bellini's sheet lists two times, 6:00 and 7:00, without saying which is for what. Start with 6:00, and allow about a minute longer for Fujifilm slide film, as Bellini's UK retailer advises. Follow the time exactly, because this bath sets how light or dark every slide will be.
6:00 to 6:15 at 38 ± 0.3°CADOX C-TEC colour developer and bleach-fix
Rinse with warm water, then pour in the colour developer, which in this kit also does the reversal. Agitate it and the bleach-fix the same way as the first developer. After the bleach-fix the film is safe in light, so you can open the tank. Then go to step 6.
| ADOX C-TEC E-6 | Time | Temperature |
|---|---|---|
| Rinse with warm water | 2:30 | 33 to 43°C |
| Colour developer | 6:00 | 38 ± 2°C |
| Rinse with warm water | 2:30 | 33 to 39°C |
| Bleach-fix | 6:00 | 20 to 40°C |
| Final wash, running water or a change every 30 seconds | 4:00 | 33 to 39°C |
| Stabiliser, no rinse afterwards | 1:00 | 20 to 39°C |
Bellini reversal, colour developer, bleach and fix
Wash, then pour in the reversal bath. Agitate the reversal, pre-bleach and stabiliser for the first 15 seconds only, and every other bath the same way as the first developer. From the colour developer onwards the film is safe in light. For the stabiliser, Bellini suggests 1 to 2 litres at room temperature, dipping the film 3 or 4 times with fresh stabiliser each dip. Then go to step 6.
| Bellini E-6 | Time | Temperature |
|---|---|---|
| Wash | 2:00 | 38°C |
| Reversal | 2:00 | 38°C |
| Colour developer | 6:00 | 38 ± 1°C |
| Pre-bleach, straight after the colour developer with no wash | 2:00 | 38°C |
| Bleach | 6:00 | 38°C |
| Fixer | 4:00 | 33 to 38°C |
| Wash, three times | 2:00 each | 33 to 38°C, the last one 20°C |
| Stabiliser | 0:30 per dip | Room temperature |
Dry
Take the film off the reel, wipe it gently, and hang it from a clip with a weighted clip at the bottom, somewhere free of dust and draughts. Keep it below 45°C and don't touch the picture area while it is wet. Wet slides look slightly milky. Once they are dry, the colour comes up.
About 2 hoursView, mount or scan your slides
Slides are finished pictures, so the first look is the best part. Hold the strip up to a window or lay it on a light pad, a thin panel that lights film evenly from behind. To project or store them, cut the frames apart and click them into slide frames, or use a slide mounter to speed that up. To scan, a digital camera with a macro lens over a light source and a holder such as the Valoi easy35 works well. Unlike negatives, there is nothing to invert, so what the camera sees is what you get. Our film scanning options page compares the choices.
Put the chemistry away
Pour each bath back into its own bottle, squeeze out the air or top up with glass marbles, and write the number of rolls on the label. How long each bath keeps is in the next section.
Reusing E-6 chemistry and how long it lasts
Each run weakens the chemistry a little, so the times go up as the roll count rises. These are ADOX's times for 1 litre of working solution. If you mixed 500 ml, move to the next column every two rolls instead of every four. Wash the tank and reel well between runs and let them dry for at least an hour.
| ADOX, 1 litre | Rolls 1 to 4 | Rolls 5 to 8 | Rolls 9 to 12 |
|---|---|---|---|
| First developer | 6:15 | 6:30 | 6:45 |
| Colour developer | 6:00 | 7:00 | 8:00 |
| Bleach-fix | 6:00 | 7:00 | 8:00 |
With Bellini, rolls 7 to 12 get 6:30 in the first developer (or 7:30, the longer figure on the sheet) and 6:30 in the colour developer. Every other Bellini time stays the same.
| How long ADOX keeps | Mixed, unused | Mixed, used |
|---|---|---|
| First developer | 8 weeks | 2 weeks |
| Colour developer | 12 weeks | 6 weeks |
| Bleach-fix | 12 weeks | 12 weeks |
| Stabiliser | 12 weeks | 6 weeks |
Used first developer lasts only two weeks, so batch your rolls. Opened concentrates keep 24 weeks and a sealed kit about two years, stored between 5 and 30°C and never frozen.
Pushing and pulling E-6 film at home
If a roll was shot too dark or too bright, you can correct it within limits by changing only the first developer. Exposure is measured in stops, and one stop is double or half the light. Developing longer for underexposed film is called pushing, and developing shorter for overexposed film is pulling. Every other bath stays the same. These are ADOX's corrections, starting from the standard 6:15.
| Exposure | Process | First developer |
|---|---|---|
| 2 stops too dark | Push +2 | 11:45 (6:15 + 5:30) |
| 1 stop too dark | Push +1 | 8:15 (6:15 + 2:00) |
| 1 stop too bright | Pull −1 | 4:15 (6:15 − 2:00) |
| 2 stops too bright | Pull −2 | 6:15, with the first developer at 31°C |
Pushing wears out the first developer faster, and 500 ml then covers 4 rolls at Push +1 and 3 at Push +2. Pushed slides come out more contrasty with weaker blacks, and pulled slides look flatter, so treat it as a rescue rather than a habit. Pulling can also tame harsh light, and pushing can lift very soft light. The Bellini sheet gives standard times only. For the idea in general, see how to push underexposed film.
E-6 troubleshooting and reading your slides
Hold the dry strip against a window. A good slide has deep, clean black between the frames, the film name and frame numbers printed clearly along the edge, and pictures that look like the scene did. Most problems show on the strip before you scan anything.
| What you see | What went wrong | What to change |
|---|---|---|
| Slides too light, washed out | Overexposed, or the first developer was too hot, too long, agitated too hard, or contaminated with bleach-fix | Check the light meter. Lower the first developer temperature or shorten it by 15 to 30 seconds. Mix fresh first developer |
| Slides too dark | Underexposed, or the first developer was too cool or too short, the tank wasn't pre-heated, or agitation was too gentle | Check the light meter. Pre-heat the tank. Lengthen the first developer by 15 to 30 seconds or agitate a little more |
| Colour or brightness changes from roll to roll | The first developer temperature drifted during the run | Pre-heat the tank, warm the chemistry slightly above 38°C, or let the AGO adjust the time |
| Blacks look green | A developer was contaminated with stabiliser | Clean the tank and reel thoroughly after every run |
| Blacks are grey, with reddish-brown or green tones | First developer contaminated with colour developer | Mix fresh first developer, clean everything, and always mix the first developer first |
| Streaks, uneven colour or blotches | Not enough agitation, drifting temperature, or a processor that isn't level | Pour faster, especially the first developer. Level the processor. Agitate more |
| Whitish spots on the dry film | Hard water in the stabiliser | Mix the stabiliser with demineralised water and re-bathe the film |
| Orange film with negative images | Colour negative film went through E-6, or slide film went through C-41 | Nothing to fix. Check the film box before the next run |
Habits that keep slides consistent
- Check the thermometer once against a known reference. A probe that reads half a degree high is already outside the first developer's range.
- Count rolls on the bottle. The reuse tables only work if you know the number.
- Expose carefully. Slide film has little room for error, so meter for the bright parts of the scene and let the shadows go dark.
- Gloves, ventilation, and nothing down the drain. Used chemistry carries silver. Bottle it and take it to your local collection point.
Where to go from here
- New to colour? Start with C-41 at home. It runs at the same temperature with one developer instead of two.
- Still deciding how to set up? The best way to develop film at home compares the options across film types and volume.
- Black and white slides are a separate process. The ADOX Scala kit develops Scala 50 as positives.
- Stuck with a strip that looks wrong? The Discord and the Facebook group are where home developers compare results.
Questions about developing E-6 at home
Can you develop E-6 slide film at home?
Yes. You need the same tank, reel and changing bag as for black and white, plus an E-6 kit and a way to keep the first developer at 38°C within three tenths of a degree for about six minutes. That last part is the hard one, and it's what the AGO Film Processor takes care of.
What temperature does E-6 need?
38.0°C (100.4°F) for both developers, which is Kodak's standard. The first developer allows ±0.3°C and the colour developer about ±1°C. The bleach, fix, washes and stabiliser can run cooler. CineStill Cs6 and Arista kits are made to run hotter, at about 40°C.
Is E-6 harder than C-41?
A little. E-6 has two developers instead of one, and the first developer is the most temperature-sensitive step in home developing. The handling is the same, so if you can develop C-41, you can develop E-6.
Which E-6 kit should I buy?
ADOX C-TEC E-6 for your first rolls. It has the fewest pours, develops up to 12 rolls per litre and includes push and pull times. Bellini, JOBO and Ilford Ilfocolor make six-bath kits that keep each stage of the lab process in its own bottle. The AGO has a built-in program for all of them.
How long does it take to develop E-6 film at home?
About an hour from start to hanging film. Warming the chemistry takes 15 to 30 minutes and the wet steps about 30, a little more with a six-bath kit. Drying takes around two hours.
Can I reuse E-6 chemistry?
Yes. ADOX C-TEC and Bellini each develop about 12 rolls per litre, with the times going up as the count rises. Used first developer keeps only two weeks, so batch your rolls.
What happens if I develop slide film in C-41 chemistry?
You get negatives instead of slides, with strong contrast and shifted colours. That is called cross-processing, and some photographers do it on purpose for the look. For real slides, use E-6.
Do I need a darkroom to develop slide film?
No. Only loading the film onto the reel needs darkness, and a changing bag does that in about a minute. Once the tank is closed, every step happens in normal room light.
Do I need an AGO to develop E-6 at home?
It's what makes E-6 dependable at home. You can try with a water bath and a thermometer, but holding the first developer within three tenths of a degree by hand is very hard, and results tend to vary. The AGO measures the developer temperature inside the tank and adjusts the time to match, so each roll gets the development it needs.
Times, volumes and capacities on this page come from the makers' instruction sheets, ADOX C-TEC 3-Bath E-6 Developing Kit (2024), Bellini Foto KIT E6/1 (REV1, 20-11-2025), JOBO E-6 Color Positive Developing Kit, CineStill Cs6 and Arista Rapid E-6. The standard process temperature is from Kodak publication J-83, Chemicals Process E-6.