HP5 Reversal Processing

Hans Borjes · Dec 29, 2006

I just thought I let you know that HP5 reversal processing delivers good results. I am quite surprised. Example scan in linked doc below.

Ilford's warning in their manual is not a good recommendation, I would recommend to consider this film for reversal processing (as DR5 does).

Anyone else having experience with reversing HP5? Or Trix-X?

Lloyd Chan · Dec 29, 2006

Hans, I find HP5+ reverses beautifully in dr5. What is more, it pushes very well in the dr5 process. Example below was shot at 1000.

tchamber · Dec 29, 2006

Lloyd Chan said:
Hans, I find HP5+ reverses beautifully in dr5. What is more, it pushes very well in the dr5 process. Example below was shot at 1000.

I agree. I shoot HP5+ at 800, and the results in dr5 are great.

Rob Archer · Dec 29, 2006

I love HP5+ and Scala (RIP) sounds like the best of both worlds?!

What's dr5 and where do I get it /how do I make it?

Rob

craigclu · Dec 29, 2006

Rob Archer said:
I love HP5+ and Scala (RIP) sounds like the best of both worlds?!

What's dr5 and where do I get it /how do I make it?

Rob

Here's their web site:

http://www.dr5.com/main.html

gainer · Dec 30, 2006

The only thing I could see against it is that the base density of HP5+ is higher than most other modern films, including FP4+. That would only be a problem if you had a weak projector in a big hall.

Hans Borjes · Dec 30, 2006

gainer said:
The only thing I could see against it is that the base density of HP5+ is higher than most other modern films, including FP4+. That would only be a problem if you had a weak projector in a big hall.

I am not sure I fully understand what you are writing. What do you mean by base densitiy? Do you think of the slightly blue base material (only applicable to 135 film type, 120 is crystal clear), or have you experienced that HP5 slides have a higher density than FP4, which I cannot confirm.

dr5chrome · Apr 18, 2007

GG
HP5 in dr5 has a dmax of 3.8 give or take. there is not image quality loss up to 1600iso. scala at its best is 3.1 and is 2.7-8 in an agfa machine.
in the end HP5 is just a better film! (there was a url link here which no longer exists)

regards
dw

www.dr5.com

gainer said:
The only thing I could see against it is that the base density of HP5+ is higher than most other modern films, including FP4+. That would only be a problem if you had a weak projector in a big hall.

Helen B · Apr 25, 2007

dr5chrome said:
... scala at its best is 3.1 and is 2.7-8 in an agfa machine.
...

If anyone is interested: Scala sent to Main/Fiesta comes back with a DMax of around 3.1.

Best,
Helen

Hans Borjes · Apr 26, 2007

I don't think that Dmax tells too much about a film/development combo. It is too much simplified, similiar as Total Harmonic Distorsion THD in audio systems. It is more a marketing argument.

Dmax and Dmin together tell more, but still not that a development with biggest difference between Dmin and Dmax is the best development. A density curve captured from a known test chart would allow comparative measure.

There have been many labs processing Scala in the past. When I compare the results I can see considerable differences between them. The worst development ever seen has digh Dmax but also a high Dmin.

dr5chrome · Jul 29, 2007

This fact is not correct. Are you replying to my post directly, quoted..? Best that you not bother. I hope you are not comparing this other labs quality to our scala film processing.

2.76 is the dmax this lab produces. Better buy yourself a new densitometer, or you can send the processed film to us and we will read it for you

Helen B said:
If anyone is interested: Scala sent to Main/Fiesta comes back with a DMax of around 3.1.
Helen

Hans; your conclusions about DMAX is extremely incorrect. DMAX in reversal processing is very important. It shows the quality of a film in reversal processing. I would appreciate you doing some tests with us before you decide to blast every post we make. I dont see how you can do this without seeing what we do 1st. Do not tell me what our process can or can not do. We have spent many years perfecting the dr5 process. It is not what you are doing, or what anyone else is doing.

BTW; FP4 has a dmax of 3.34 @ 100 iso and a DMIN of .33 without white detail blowout [the same as scala].

HP5s DMAX on average is 3.4 - 3.6 between the iso of 400 & 1000, DMIN runs about .40

The stronger the DMAX a film can produce, the more versatile it is, negative or positive.

I am happy to answer your questions privately.

regards

dw

Helen B · Jul 30, 2007

dr5chrome said:
This fact is not correct. Are you replying to my post directly, quoted..? Best that you not bother. I hope you are not comparing this other labs quality to our scala film processing.

2.76 is the dmax this lab produces. Better buy yourself a new densitometer, or you can send the processed film to us and we will read it for you

David,

You are incorrect. You have a commercial interest in spreading false information about your rivals. I have no commercial interest in this, and no motivation to tell anything other than the truth.

Helen

HP5 Reversal Processing

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