A strong, concentrated developer, this 1L bottle of SE20C Catechol Paper Developer from Moersch Photochemie is slow-working and can be used as either a single-bath developer or as a first developer in a two-bath process. Its makeup incorporates a high degree of restrainer and low amount of accelerator (phenidone), which produces greater density and approximately one grade higher contrast than typical developers. This increase in contrast and slow-working speed affords a great deal of control during processing, in either single or two-bath configurations. Additionally, SE20C also imparts a slight warm tone to prints, depending on paper type, however can be used in conjunction with Finisher Blue to retain a neutral to cooler print tone.

Use as Single Bath- or First Developer    Concentrated Solution, Slow Working    High Contrast Developer    Produces Slight Warm Tone

Related Questions and Answers

Q: 1. Why is it store pickup only?

A: Due to shipping regulations regarding film chemistry we are unable to ship this item.

Q: 2. Does 'Dektol - 2019 Version' mean that it's the contaminated stuff?

A: This current Kodak Professional DEKTOL Paper Developer would not exhibit any issues.

Q: 3. Do you have to mix the whole gallon at one time? Should it all be mixed at one time? How long does the developer last mixed up in a gallon jug? When you use it for 1 print developing session, do you throw out the developer that you just used?

A: Kodak recommends that you mix the entire package due to the fact that the different dry chemicals will separate and stratify in the package due to shipping. Once the stock solution is mixed with water it will keep up to 6 months in a full tightly sealed container. You can keep multiple smaller containers of the stock solution if you desire, again they should be full and tightly capped.Regarding a printing session, Kodak states a capacity of 120 8x10 prints per gallon of 1:2 dilution developer. Most people never attempt to use it to full capacity since the developer is cheap and it can be difficult to detect when the developer is becoming exhausted. You may mistake exhausted developer for insufficient exposure or contrast. If your a hobbyist then use it for something less and replace. I personally use it to 50 to 75 percent of capacity and never more that two printing session due to concern of extended exposure to the air / oxidation.

Q: 4. Is Rollei Supergrain considered a one-shot developer?

A: Yes. Rollei Supergrain Film Developer is considered a one shot developer.

Q: 5. Does it have a shelf life or go off? I've had a bottle for a couple of years and haven't needed to use it till now and wasn't sure if I still could

A: If the bottle was not opened, it should still be good.

Q: 6. Can Acufine be replenished?

A: No, there is no replenisher made for Acufine Acufine Developer (Powder) for Black & White Film - Makes 1 Quart.

Q: 7. What is the shelf-life of this developer?

A: It ranges depending on storage conditions. Unopened it should be fine up to 1.5 years. Once opened if can range between 3-6 months.

Q: 8. What is shelf life of unopened package of ID-11 powder? Thanks.

A: If it stays perfectly dry it will last for years. It begins to oxidize after it mixes with water and is then exposed to air light and heat.

Q: 9. What’s the shelf life for the concentrate? When does it expire?

A: Each bottle has a different exp date when purchased but typically will last about 2 years in a well sealed bottle.

Q: 10. What is the dilution ratio from concentrate for developing 100 Tmax and 400 Tmax? Also what is a standard development time?

A: Hi Bob, Click on the link below to view the technical data and the development times: https://imaging.kodakalaris.com/sites/uat/files/wysiwyg/pro/chemistry/j24.pdf