Developing Time for 35mm Arista EDU 400 In D-23 Straight?

[F4U]

I've got a pretty important roll of 35mm I shot on the film as titled. The massive developer chart is not giving me any insight to deduce a possible starting point on the developing time for this. Naturally I will be making a short strip test or 2 before actually doing my important roll.B ut I figured if anybody out there has any experience in this film and developer combo it wouldn't hurt to ask what they are using. I'll be using 75F, but if you do yours at 68F, I believe I can knock a minute or 2 off that and still end up OK. Thank you.

 

[Paul Howell]

If Artista edu 400 is Foma 400 then the MDC does give two times and ISOs. I have always used Foma times for Artista films. Using my very old Kodak dataguide from 1965, a guess for 75 degree is reduction of 2 minutes which is what you anticipate fo 5.5 minutes at ISO 250 stock. If you shoot at 400 I would treat it as a 1 stop push.

Film Developing Times ▸ Fomapan 400 in D-23​

Film	Developer	Dilution	ASA/ISO	35mm	120	Sheet	Temp	Notes
Fomapan 400	D-23	stock	250	7.5	7.5	7.5	68F
Fomapan 400	D-23	1+2	400	20	20	20	68F

The Massive Dev Chart
www.digitaltruth.com

 

[Bill Burk]

@dcy probably can chime in here.

 

[dcy]

@Bill Burk Thanks for the ping.

@F4U While I don't know the answer to your question, as chance would have it, I have with me a throw-away roll of Arista EDU Ultra 400 that I shot specifically for the purpose of testing it with D23. Right now it's late for me, but if you are willing to wait a day, I would be happy to the test with D23 straight at various dev times and post the results.

Let me tell you what's in the roll:

On a bright sunny day I went to a plaza and shot the same 6 scenes over and over for an entire roll. The camera is a Pentax 17 so I'm trusting the camera's internal light meter. I shot each scene twice: once at EI 250 and once at EI 160, then I moved on to the next scene.

I actually did this for 5 different rolls of film, but Arista EDU 400 is one of them, and I was planning to develop it this week. What I've been doing is I cut the film into 4 pieces inside a dark bag, and then develop each piece separately.

If you look at my post history, you'll see a post where I tested AristaPan 100 with 4 different developers. Later tonight (if all goes well), I hope to make another post where I test Kentmere 200 with D23 1+1 at two different times.

In any event, I had originally planned to test Arista EDU 400 with D23 1+1 for a few different times, but since your roll is pretty important, I wouldn't mind testing it with straight D23 at different dev times and then post the negatives here. As I said, it'd have to wait till tomorrow.

EDIT: I just remembered that the first few shots were accidentally taken at the wrong EI. So I only expect to get 3 good pieces of film that have all 6 scenes in them --- of course, I can cut smaller pieces and let the scenes be a bit different from piece to piece.

 

[npl]

The Arista 400 datasheet, like the fomapan 400 datasheet, gives 7-8min for D76 stock at 20°c.

I believe the D76 times are similar or at least good starting point for D23 (https://www.kennethleegallery.com/html/tech/D-23.php)

As a general advice, films datasheets are the first place to look. The massive dev chart, the last.

 

[Saganich]

At 400, fresh stock D23 normal development will be about 10 minutes at 20C.

 

[F4U]

@Bill Burk Thanks for the ping.

@F4U While I don't know the answer to your question, as chance would have it, I have with me a throw-away roll of Arista EDU Ultra 400 that I shot specifically for the purpose of testing it with D23. Right now it's late for me, but if you are willing to wait a day, I would be happy to the test with D23 straight at various dev times and post the results.

Let me tell you what's in the roll:

On a bright sunny day I went to a plaza and shot the same 6 scenes over and over for an entire roll. The camera is a Pentax 17 so I'm trusting the camera's internal light meter. I shot each scene twice: once at EI 250 and once at EI 160, then I moved on to the next scene.

I actually did this for 5 different rolls of film, but Arista EDU 400 is one of them, and I was planning to develop it this week. What I've been doing is I cut the film into 4 pieces inside a dark bag, and then develop each piece separately.

If you look at my post history, you'll see a post where I tested AristaPan 100 with 4 different developers. Later tonight (if all goes well), I hope to make another post where I test Kentmere 200 with D23 1+1 at two different times.

In any event, I had originally planned to test Arista EDU 400 with D23 1+1 for a few different times, but since your roll is pretty important, I wouldn't mind testing it with straight D23 at different dev times and then post the negatives here. As I said, it'd have to wait till tomorrow.

EDIT: I just remembered that the first few shots were accidentally taken at the wrong EI. So I only expect to get 3 good pieces of film that have all 6 scenes in them --- of course, I can cut smaller pieces and let the scenes be a bit different from piece to piece.

Man that would be great. Will stand by. Thank you.