How much developer: dilution or amount or both?

[Leigh B]

I prefer to add the developer first rinsing the smaller graduate into the larger one, it's about consistency rather than absolutes.

I do the same.

I didn't realize we were discussing basic laboratory practices and techniques.

- Leigh

 

[Leigh B]

Here's an AGFA datasheet that shows times for 1+100 as well as the 1 + 25 and 1 + 50:

Dead Link Removed

- Leigh

 

[Gerald C Koch]

Leigh my browser can't find the document which is marked as broken.

 

[Leigh B]

Hi Gerald,

Yeah, the forum s/w keeps screwing up the URL that I post.
Try it now. It works for me.

Or copy the URL and paste it into your browser.

- Leigh

 

[Ian Grant]

A working link has been posted earlier in this thread, it's data published by Agfa USA and doesn't match anyofficial Agfa Europe/Germany data sheets where dilutions greater than 1+50 have never been recommended.

Ian

 

[Leigh B]

A working link has been posted earlier in the thread, it's data published by Afga USA and doesn't match any Agfa Europe/Germany data sheets.

So what?

We're in the USA, buying product that's sold in the USA and backed by AGFA USA.

I couldn't care less what they do in Europe.

- Leigh

 

[Ian Grant]

So what?

We're in the USA, buying product that's sold in the USA and backed by AGFA USA.

I couldn't care less what they do in Europe.

- Leigh

The bottom line is it give poorer results when not used properly regardless of what country it's used in. If your happy to not get the best from your films that's fine.

Ian

 

[Leigh B]

The bottom line is it give poorer results when not used properly regardless of what country it's used in. If your happy to not get the best from your films that's fine.

I get quite excellent results from my film, and have for over 50 years.

If you're such an authority, post a picture of your AGFA employee badge.

- Leigh

 

[Gerald C Koch]

Atwater Kent must be a pseudonym like Ford Prefect in The Hitchhikers Guide To The Galaxy. Atwater Kent was the name of a very old brand of radios. Anyhow the link roks now. Thanks Leigh

 

[Leigh B]

Atwater Kent was the name of a very old brand of radios.

Yep.

I set up that site as a source for all available information on those radios, including drawing modern schematics for the older ones.

- Leigh

 

[kobaltus]

Just 5 ml Rodinal per roll is enough for 35mm or 120 film. On 1000+ films never failed.

I prefer 1: 50 dilution

Thanks darkroommike for correction. I use 5ml, but I was mistyping 0,5.

 

[darkroommike]

Just 0,5ml Rodinal per roll is enough for 35mm or 120 film. On 1000+ films never failed.

I prefer 1: 50 dilution.

0.5 ml Rodinal per roll at 1:50? If you use 1+50 ratio and only one half milliliter per roll your volume of working solution of developer per roll is just 25.5 milliliters. A Patterson tank requires 300ml of developer for one roll of 35mm film and 500ml for a roll of 120 film.

If you mean 1/2 milliliter per roll of film then:

• your dilution for 35mm is 0.5 + 300 per 35mm roll which is 1+600 not 1+50!
• and for 120 it's 0.5 + 500, which is 1+1000 again not 1+50!

The math does not check.