The Photographer's Formulary Excel Film Enhancer will give your favorite film developer increased shadow detail, and film speed, while reducing the grain and developing time.

It gives crisp, easy to print negatives without blocking the highlights

Excel is an easy to use non flammable liquid concentrate, which can be used with diluted or undiluted developers by keeping the ratio of 30 ml per liter. Excel is excellent for low light photo sessions and improves push processed films

Shelf life is 1 year in a tightly sealed bottle.

Related Questions and Answers

Q: 1. Does this come with a chart of development times for common film stocks?

A: No, the Photographers' Formulary Substitute for D-19 Black & White Film Developer (to Make 1 l Working Solution) does not come with a chart of development times for common film stocks.

Q: 2. How many rolls of 35mm film can be developed with a 1-liter solution?

A: Depending on your tank/reel set up, it might vary slightly. On a Paterson universal, the typical amount of develop you need to submerge a roll of 35mm is 300ml. Assuming this, this would safely develop roughly 3 rolls of film.

Q: 3. new to developing film. I have a question so if I am using this to develop one roll of tri-x film how much developer do I use with water? I am having trouble understanding the ratio when it says 1:9? And fixer?

A: I don't remember the water-to-developer ratio for Ilfosol, but using the 1:9 ratio you mention - 1:9 means 1 part developer to 9 parts water. So, when developing one roll of film, determine how much mixed developer you need - often you can find this info on the bottom of your developing tank - for example, my developing tank says I need 300ml to develop one roll of 35mm (135) film, so for this I would mix 30ml of developer with 270ml of water.As for fixer, the ratio of concentrate to water depends on which fixer you are using. I use Ilford Rapid Fixer, which is mixed at a 1:4 ratio (1 part concentrate to 4 parts water). So with the 300ml tank mentioned above, I would mix 60ml of fixer concentrate to 240ml of water.In my experience, with mixing ratios, the low number is the for the concentrate and the higher number is for water.Hope this helps and good luck.

Q: 4. Can i reuse the mixed chemical?

A: You should dispose of the developing mixture after using it once--using depleted developer will produce subpar results.

Q: 5. Does this need to be stored in an amber bottle?

A: The Photographers' Formulary 130 Developer for Black & White Paper (Makes 2 Liters) should be stored in a dark bottle.

Q: 6. What's the particle size?

A: The folks at Photographers' Formulary say, "Our Carbon Black is very, very fine. It might be called an “air float” powder."

Q: 7. What is the shelf life after it is mixed ?

A: 12 months under the sink in separate bottles mixed in water - ambient around 28 Centigrade.no problems....

Q: 8. what is the shelf life in a full bottle. About how many rolls can be developed?

A: The shelf life would be about 6 months.

Q: 9. considering that it's a liquid, are there any issues shipping internationally? (i live in brazil btw)

A: There currently are no shipping restrictions to Brazil.

Q: 10. How long does it survive after being opened?

A: When it starts to turn dark i no longer use it