Mixing chemicals from scratch. This is today's theme.

ECN-2 is a photographics process for the color negative motion picture film.

For those that are interested in films like Kodak Vision 3 500T, 250D, 50D or Fujicolor F-64D. But not only for them. You can also process films like Kodak Portra 400, Ektar 100 or Fuji Industrial...simply any other color film for process C-41.

Like this one, Kodak Portra 400 loaded in Kiev 88:


I use Kodak Endura Premier for RA4 prints.

Here is the formula:

ECN-2 Color Developer

Water 100F / 500ml
Sodium Sulfite, anh. / 2g
Potassium Bromide, anh. / 1.4g
Sodium Carbonate, anh. / 25.6g
Sodium Bicarbonate / 2.7g
CD-3 / 4g
Water to make 1000ml


Water 100F / 500ml
Potassium Ferricyanide, anh. / 40g
Sodium Bromide, anh. / 25g
Water to make 1000ml


Water 100F / 500ml
Sodium Thiosulfate, crystal / 250g
Potassium Metabisulfite, anh. / 25g
Water to make 1000ml

It's important to wash the tank properly between every step of the process.

Here is the process:

Time / min:sec

Developer at 105F/41C

1-2 film 3:15
3-4 film 3:35
5-6 film 3:55
7-8 film 4:15
9-10 film 4:35
11-12 film 4:55

Bleach at 105F/41C


Fix at 100F/41C


And final rinse...

Here is a short video:

This can be use for any C-41 color film on the market. And for true ECN-2 films you need to have another more bath before developer. It's called REMJET prebath. Because ECN-2 films like Vision 3 500T or 250D have a remjet, so you need to remove it before developer. Remjet is a layer found in most cinematographics films. It is usually a coating on the back of the film base.

Here is the formula:

REMJET Prebath

Water 100F / 500ml
Borax, decah. / 20g
Sodium Sulfate, anh. / 100g
Sodium Hydroxide / 1g

You need to soak the film for 10 seconds at 80F/27C and then wash the film and then continue with the process.

Also you can use alternative prebath formula, 2 tablespoons of baking soda or washing soda, but it's not so effective and you will need to wash the film a lot of more.

Another Kodak Portra 400 loaded in Kiev 88:



  1. Hi i would live to mix my own raw chemicals , i have kodak vision film , i sent you an email with some qouestions about , thank you , this is nice


Post a Comment

Popular Posts