Sprocket Flow Marks on Negative in Emofin?

[russell_brooks]

I was using the emofin 2 bath developer. In the 2nd bath I didnt agitate at all and got flow marks near the sprocket holes. I have used emofin often before but always agitated one every minute in the 2nd bath. But on re-reading the instructions they dont say to agitate the 2nd bath. Also I read a post on a German language newgroup where someone mentioned using "stand" development for the 2nd bath. This should give better compensation as the developer exhausts in the highlights... So what is the proper what to agitate and/or how do I get rid of these flow marks but still keep best compensation?

[russell_brooks]

I found the German post:<br>ein wichtiger Tip, der in der Anleitung

nicht so klar gesagt wird wie es sein sollte: Waehrend der zweiten

Entwicklungsstufe NICHT kippen oder sonstwie bewegen, sonst geht der

ganze schoene Ausgleicheffekt floeten.<br>Basically he says to not

agitate at all in the 2nd bath. This kind of makes sense but when I

did this I got the flow marks.

[george_paltoglou]

Russell,

 

<p>

 

try emailing Tetenal directly. They are very responsive to questions

and should be able to provide the 'official' recommendation re

agitation. I think the address is technicalservice@tetenal.com

[samuel_tang1]

I imagine that you are confusing two separate issues here: sprocket

rush and bromine streaks. The former is due to extra development during

inversion agitation when the sprocket holes allow for an extra rush of

developer over the negative surface, and it looks like extra density

coming out of the sprocket holes across the negative width. The latter

is due to the bromine produced during development sinking, and looks

like lower densities streaking from high density areas.

 

<p>

 

I have used various two-bath developers including Heinrich Stoekler and

Emofin, and discovered that the best way to banish both problems is to

use rotary processing with a Jobo processor. The compensating effect is

still present to a large degree, but then printable negatives are

assured.

[russell_brooks]

I think it is more like the one poster said - bromine streaks. I

agitated for 10 sec after the 2nd bath and then one up/down every

minute for the first 3 minutes. The remaining 6 minutes I just left

it sit... It looks like the streaks are gone but I am going to have

to check carefully with the densitometer

[russell_brooks]

Tetenal answered my email and said that you agitate the 2nd bath the

same as the 1st. They also said that this doesnt kill the

compensation effect... So now I dont know what to think.

[samuel_tang1]

The compensating effect occurs within the gelatin layer so it is not

dependent on agitation, but you still need even agitation for the

second bath to get eveness in density, which is particularly critical

in the case of two-bath development as you know so well.For me the only

way to do it properly is to use Jobo machine processing.

[george_papantoniou]

I don't think stand development is a good idea with Emofin, since its

second bath is a quite strong alkali that will surely cause uneven

development if it gets exhausted in some places and still works in

other. Soft agitation might be the answer for increased edge effects

and not partial stand development (that might work well with other

developers). I have also tried diluting Emofin more that tha

recommended dilution (twice as much) and it works pretty well (you

have to adjust the development time of course and not underexpose

your film as you are told to do normally). The edge effects might

work better in this case too.

[volker_schier1]

Tetenal is right with their response: Agitate moderately and this will

not affect the compensating effect. The alkalinity is too high for

stand development without bromide streaking.