Kodak HC-110 developer

[ernesto18]

I recently bought a 1-liter bottle of Kodak HC-110. The recommended development times for all films are significantly shorter than the times recommended in the instructions for the same product (same product number) two years ago. Does anyone know if the product has changed, or is this a reassessment by Kodak of developing times for the same product?
Many thanks
Donald Richards (ernesto18)

 

[HiHoSilver]

Check the resources section - you'll find extended writing and excellent links on HC-110. There are various dilutions that can extend the time. My normal routine is semi-stand. 1:119 for FP4, 1:150 for HP5 for 50-55 min. Dilution 'H' for HP5 is about 11 min w/ normal agitation.

 

[darkroommike]

Try processing a roll at each recommended time and print off a few frames. the published times are never intended to be anything but a jumping off point so jump into it. And stay away from the special dilutions until you get a few (thousand-KIDDING!) rolls under your belt. HC-110 is a great developer and I hope it doesn't get price jacked out of existence.

 

[bvy]

The times shouldn't have changed. There are so many variables it can be confusing. Can you give us examples?

 

[MattKing]

I recently bought a 1-liter bottle of Kodak HC-110. The recommended development times for all films are significantly shorter than the times recommended in the instructions for the same product (same product number) two years ago. Does anyone know if the product has changed, or is this a reassessment by Kodak of developing times for the same product?
Many thanks
Donald Richards (ernesto18)

Where are you finding these new development times?
Kodak still references J-24 (revised 2010-02) on their website for HC-110. The 2010 revision removed references to discontinued products, but I don't believe it changed the information for unchanged continuing films.
There were changes to the 400 speed of T-Max in 2007 that made the original, 2002 version of J-24 incorrect for that film.

Here is the link to J-24: http://www.kodak.com/global/en/professional/support/techPubs/j24/j24.pdf

 

[ernesto18]

Many thanks to all that answered, and so promptly.

The mystery has been cleared. I went to the link that MattKing suggested, and there, amongst other things, there are two tables, one for developing sheet film in trays, the other for roll film. The times for the same film are different depending on which type of film (sheet or roll) one uses. This also true for the Kodak information sheet G-13 (H) from many years ago, that I have.

What has happened is that the information on the label on the new bottle I bought mentions times for roll film, whilst the older bottle has the information for sheet film, which are longer, and the ones I knew. There is no link on either bottle to any Kodak publication.

The developing times I use for developing Tri-X 320 4x5 sheet film were obtained from doing the necessary Zone System tests, so I was only interested in knowing if the developer had changed. It turns out, thankfully, that only the label has changed. I will talk to Silverprint, where I bought the developer, to let them know, in case someone has the same doubts.

Again, many thanks to all that replied.

Best regards

Donald Richards (ernesto18)