ORWO NP55

andres victorero · September 22, 2006

Hi i just get some carts of ORWO NP55. I don´t know nothing about this stock, only it´s a 80ASA.

I plan to develop the stock in home in lomo tank.

I´m not sure about if can be developed like a resevrsal B/W stock, someone knows something abot this?

thanks

Olex Kalynychenko · September 22, 2006

Hi i just get some carts of ORWO NP55. I don´t know nothing about this stock, only it´s a 80ASA.

I plan to develop the stock in home in lomo tank.

I´m not sure about if can be developed like a resevrsal B/W stock, someone knows something abot this?

thanks

You can check

http://www.filmotec.de/English_Site/Products/products.html

I not see NP55 film on list of ORWO films, they show B&W negative films UN-54, N-74.

The peoples from Filmotec told me about processing of B&W negative films on reversal technology.

Yes, This is possible.

I make a some test with other type of B&W negative films, any case you will need make a some test too.

I don't know structure of NP55 film, but, I know, Svema B&W negative films included antihalation layer and this is layer can spoil of reversal image on processing with optical re-exposing.

That's why, i use chemical re-exposing and re-exposing on Ultra-red lights.

I had very good result of processing B&W film on reversal processing with SVEMA MZ-3, ZT-8, Micrat-200, Micrat-300 , ORWO DP-3 films.

Edited September 22, 2006 by Olex Kalynychenko

andres victorero · September 27, 2006

Thanks Olex. I made some test with bad results. I reexposing the film with light but It don´t work.

what kind of chemical can i use for chemical reexposing?

thanks

Edited September 27, 2006 by andres victorero

Olex Kalynychenko · September 27, 2006

Thanks Olex. I made some test with bad results. I reexposing the film with light but It don´t work.
what kind of chemical can i use for chemical reexposing?

thanks

If i will need make similar test, for begin , need check film like a B&W negative film, measuring real final speed of film and other.

The next test can be with B&W reversal processing.

Send me letter on olex@a-teleport.com i will send you a few formulas of chemical reexposing.

The other idea.

Kodak E-6 chemistry have solution " reversal batch process E-6 ", possile, can be good idea test this is chemistry with B&W film too.

I not make test with Kodak E-6 reversal batch.

Brian Pritchard · September 27, 2006

If i will need make similar test, for begin , need check film like a B&W negative film, measuring real final speed of film and other.
The next test can be with B&W reversal processing.

Send me letter on olex@a-teleport.com i will send you a few formulas of chemical reexposing.

The other idea.

Kodak E-6 chemistry have solution " reversal batch process E-6 ", possile, can be good idea test this is chemistry with B&W film too.

I not make test with Kodak E-6 reversal batch.

I have a copy of the NP55 datasheet. It is a panchromatic negative stock; the speed is ISO 80 and it recomends developing to an average gradient of 0.65 by developing for about 6 mins in ORWO developer 17. There is no mention of processing as a reversal but conversely it does not say it cannot be done.

I have worked in labs doing B/W Reversal processing and it is not usually a problem to reversal process a B/W neg stock. If I remember correctly you get a slight increase in speed when reversal processing a negative stock of around 1/2 a stop.

You do not mention what the problem is with the reversal exposure. It is important to give sufficient exposure for it to work correctly; you would have to give a very high exposure for there to be any problem with too much exposure.

Brian

Richardson Leao · September 28, 2006

I dunno if it would be the same, but I developed NP7 negatives as reversal with reasonable quality. The recipe:

kodak d19 + 9g of sodium tiocyanate (optional) - in 1L.

@22-23C - 4-5 min,

bleach 5min

clearing 5min

rexposure 4min

kodak d19 (no silver solvent) - 5min

fixer

andres victorero · September 28, 2006

Thanks to all for the replies.

I´m a absolute beginner in home processing.

the problem is that the film developed is black. I use Foma R100 chemicals, I´m not sure if the problem is the chemicals or the reexposure :rolleyes:

I´ll try again

Robert Hughes · September 28, 2006

I don't know about the Orwo film / Foma processing connection. I have heard that Foma film in Kodak reversal processing is not reliable. Fomapan film uses a unique formulation requiring Foma chemicals, and supposedly has a silver antihalation layer on the back which must be removed (similar to old Kodak 4X reversal).

Brian Pritchard · September 29, 2006

Thanks to all for the replies.
I´m a absolute beginner in home processing.

the problem is that the film developed is black. I use Foma R100 chemicals, I´m not sure if the problem is the chemicals or the reexposure :rolleyes:

I´ll try again

If the film is black then it can either have been unexposed in the camera or the first developer has not worked. You need to look and see if you can see any edge printing saying 'Orwo' or there should be clear areas where you laced the film in the camera. if you have no edge printing then the first developer has not worked. If you do have edge printing then the film was not exposed in the camera. The film being black means that it has been correctly re-exposed and re-developed.

Brian

Clive Tobin · October 1, 2006

Thanks Olex. I made some test with bad results. I reexposing the film with light but It don´t work.
what kind of chemical can i use for chemical reexposing?

thanks

This is all barking up the wrong tree. Re-exposure is not the problem, if this is inadequate the film will come out all clear and not all black.

Negative film generally does not process worth a darn by reversal. The thick negative emulsion develops and bleaches much slower than reversal films.

You probably need extra time in the first developer to prevent excess density in the redeveloped film.

You "MUST" inspect the film after bleaching to make sure all of the silver formed in the first developer has been bleached away. Otherwise, after redeveloping the film will be all black. This can be done in the light.

Re-exposure is not any particular problem. Redeveloper time probably must be increased.

Negative does not have a hardened thin emulsion and extra drying time will be needed.

Christian Appelt · October 23, 2006

Please note that Orwo NP55 has been out of production for at least ten years!

The stock you have might even be as old as 15 years or more, so unless it was stored in a deep freezer, you will have to do some testing to find out whether you can get decent contrast by finding the right exposure-processing combination.

NP55 was a fine grained b&w neg stock rated at 80ASA. It gave a really nice vintage b&w look and - from my experience - could look superior to comparable Eastman b&w stock.

Happy testing! B)

Edited October 23, 2006 by Christian Appelt