numbers...give me numbers...

i accidentally exposed a roll of iso 100 acros @ iso 400.

 

ie: pushed two stops..

 

how do i compensate in the development?

 

i usually develop in HC110 for 3.75 mins @ 22 degrees C.

 

thanks inadvance

 

doug

kodak has a rule of thumb that you should add two minutes fo every stop you are pushing...

 

but does that hold true for the fuji product as well?

Which dilution do you prefer for HC-110?

 

Also, 3.75 minutes seems a bit short for the typical Dilution B. Such short times can produce inconsistent results unless steps are taken to compensate for pour times. At Dilution B, anywhere from 7-10 minutes would be appropriate, depending on scene illumination and desired contrast for Acros 100 at 400.

Douglas,

 

The massive development chart list Hc110 dilution B for acros rated 80-100at 5.5 minutes and they doe state prolonging development by multiplying by 2.25 for pushing 2 stops, so 5.5x2.25 gives 12.38 mins or about 12 min 20 sec.This is at 20°c

 

I don't know if HC110 qualifies as a compensating developer in that case 2 stop push is times 1.85 or about 10 minutes.

If possible try a clip test.

3.75mins @ 22degrees C is from the from Fuji spec sheet.

i make 2 gallons from one botle of HC-110, i believe that is dillution "b"

Dilution "B" is one part of HC-110 concentrate, the gooey stuff, + 31 parts of water. If you're using US measures, one ounce of HC-110 will yield a quart of working soulution at dilution "B".

i developed the film for 7 mins in the hc110, dillution "b" for 7 minutes.<div></div>

uncorrected film scan...

If you make 2 gallons from the concentrate, you are mixing to Dilution A (1:15). Per the Acros data sheet, 3.75 min at 22 C is for Dilution B, which is half as concentrated (1:31). The result is that you are overdeveloping, even for this situation. This is evidenced by the lack of shadow detail and blown out highlights.