Pyrocat HD dilution

[HorstS]

Hi,

I am using Fuji HD-M (X-Ray) 5x7 sheets in my Plaubel Peco Profia.
My beloved developer is Pyrocat HD.
In standard dilution (1+1+100) the time for developing is around 6 min.
But there is not much space for N- developing, what I often need.

So my thought is to make a dilution of 1+1+200 and take the double time for N developing.

Has any body experience with this?
What will be the minimum amount of developer per sheet (it is told to take 50 to 75 ml ready
for use developer per 4x5 sheet) ?
When diluted 1+1+200, have I to take 150 ml per 4x5 sheet ?

Thank you so much in forehand,
Horst Schmier.

[Andrew O'Neill]

With X-ray single and double-sided, I use a very dilute solution of Pyrocat-HD: 5ml + 5ml + 1000ml water. 21C. Tray. One shot, per sheet.

[Jim Noel]

Hi,

I am using Fuji HD-M (X-Ray) 5x7 sheets in my Plaubel Peco Profia.
My beloved developer is Pyrocat HD.
In standard dilution (1+1+100) the time for developing is around 6 min.
But there is not much space for N- developing, what I often need.

So my thought is to make a dilution of 1+1+200 and take the double time for N developing.

Has any body experience with this?
What will be the minimum amount of developer per sheet (it is told to take 50 to 75 ml ready
for use developer per 4x5 sheet) ?
When diluted 1+1+200, have I to take 150 ml per 4x5 sheet ?

Thank you so much in forehand,
Horst Schmier.

You don't indicate your total volume. All you need to do is double the amount of water and use the total volume for processing. This guarantees sufficient developer so that it will not exhaust prior to developing your film.

[HorstS]

Thank you so much for your helpful advises.
There is a question left : What would you say about developing time when dilution is 1+1+200 .... double time ?

THX,
Horst Schmier

[chuck461]

I use Formulary Exactol Lux at 1:1:100 for 9min at 75deg F for roll film and 1:1:200 for 13min for sheet film. I would try increasing your time by 50 percent. Please test for yourself before developing anything critical.
I hope this helps.

[Jim Noel]

Thank you so much for your helpful advises.
There is a question left : What would you say about developing time when dilution is 1+1+200 .... double time ?

THX,
Horst Schmier

Probably a little less than double the time. Testing is in order.

[Andrew O'Neill]

You won't get any definitive answers, so best to test yourself. The stuff is dirt cheap, too.

[SMBooth]

With X-ray single and double-sided, I use a very dilute solution of Pyrocat-HD: 5ml + 5ml + 1000ml water. 21C. Tray. One shot, per sheet.

What sort of agitation Andrew?
TIA

[HorstS]

Thank you so much all,

testing is on the way.
Will report then.

Greetings,
Horst Schmier

[HorstS]

Hi,

today I have developed two sheets Fuji HD-M in Pyrocat HD (1+1+200), 20 grd C, 12 Min.
This seems to be a good point to start with.

Thanks again for all advises.

Greetings,
Horst Schmier.

[Andrew O'Neill]

What sort of agitation Andrew?
TIA

North/South, East/West, constant for the first 30 seconds. Then one, North/South, East/West cycle, every minute. Gentle agitation.

[Steve Sherman]

Most times when there is uneven development it stems from insufficient initial agitation. After a good presoak and moderate initial agitation the overall dilution can be quite dilute if trying to create any type of adjacency effects. I would suggest that if negative density dictates an initial agitation of less than 10 - 15 % of total time in developer than the dilution is too strong and an adjustment is in order.