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#1
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Sludge in Paper Developer
I mixed a package of Orwo paper developer a couple of week ago and
used it with success. Today, I tried it again, but while pouring it out, I noticed a light gray sludge. On closer inspection, it looks like shiny metal particles. What could this be, and can I still use it? Now that this happened, I noticed one mistake I made. The mixing instructions ask for 30-40degC water, but I mixed it at 20degC. Could that have something to do with it? Achim |
#2
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Sludge in Paper Developer
That is undissolved developer powder... Heat the bottle to 40 C and gently
swirl don't agitate or splash until the sludge dissolves... denny "Achim Buchholz" wrote in message om... I mixed a package of Orwo paper developer a couple of week ago and used it with success. Today, I tried it again, but while pouring it out, I noticed a light gray sludge. On closer inspection, it looks like shiny metal particles. What could this be, and can I still use it? Now that this happened, I noticed one mistake I made. The mixing instructions ask for 30-40degC water, but I mixed it at 20degC. Could that have something to do with it? Achim |
#4
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Sludge in Paper Developer
"Achim Buchholz" wrote in message om... I mixed a package of Orwo paper developer a couple of week ago and used it with success. Today, I tried it again, but while pouring it out, I noticed a light gray sludge. On closer inspection, it looks like shiny metal particles. What could this be, and can I still use it? Now that this happened, I noticed one mistake I made. The mixing instructions ask for 30-40degC water, but I mixed it at 20degC. Could that have something to do with it? Achim Are you asking about the stock developer or is this diluted and used developer? -- --- Richard Knoppow Los Angeles, CA, USA |
#5
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Sludge in Paper Developer
"Richard Knoppow" schrieb:
I mixed a package of Orwo paper developer a couple of week ago and used it with success. Are you asking about the stock developer or is this diluted and used developer? Since he is talking about Orwo developer and the fact that Orwo´s chemical department is called Calbe for more than ten years by now, I suppose he used up old stock of N113, a powder pack virtually lasting forever even when mixed. It used to be the top-selling paper developer made by Orwo in Calbe and some are still selling, buying and using 15 year old packs with no trouble at all. N113 is mixed with water and used in stock quantity - you don´t dillute it. It sounds like metallic silver, I experienced it with several developers by myself (N113, Neutol Plus, Amaloco 2002). I mixed my first and latest batch of 10liters of fresh Calbe N113 in May 2003, it took a slight yellow tint in it´s bottle and it is still going strong. :-) Great and cheap! stuff, nice reaction with MG4 and Forte Polygrade.. Gruss, Roman |
#6
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Sludge in Paper Developer
Roman J. Rohleder wrote
Since he is talking about Orwo developer and the fact that Orwo´s chemical department is called Calbe for more than ten years by now, I suppose he used up old stock of N113, a powder pack virtually lasting forever even when mixed. It used to be the top-selling paper developer made by Orwo in Calbe and some are still selling, buying and using 15 year old packs with no trouble at all. It sounds like metallic silver, I experienced it with several developers by myself (N113, Neutol Plus, Amaloco 2002). I mixed my first and latest batch of 10liters of fresh Calbe N113 in May 2003, it took a slight yellow tint in it´s bottle and it is still going strong. I've seen ORWO N113 listed as a safelight and a developer. Labor & Dunkelkammer list the developer. If that is silver it must have migrated from the emulsion into the developer and likely prior to reduction. I don't think that possible. I can't imagine it would be a good thing. Think of the image being leached, before or after reduction, into the developer. BTW, I've mentioned a few times the total USA abandonment of graded paper production. Can you recommend any one, two, or three European sources which make a practice of shipping to the States? Dan |
#7
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Graded papers ( Sludge in Paper Developer)
(Dan Quinn) schrieb:
I've seen ORWO N113 listed as a safelight and a developer. Labor & Dunkelkammer list the developer. It is a developer. If that is silver it must have migrated from the emulsion into the developer and likely prior to reduction. I don't think that possible. It happened to me... so, it seems to be possible. ;-) I experienced this with all developers I tried but Ilford Multigrade, with many papers, ranging from MG4, Polygrade5 and Orwo graded fb paper. Developing time is not an issue with this, it just happens. I can't imagine it would be a good thing. Think of the image being leached, before or after reduction, into the developer. I never noticed any degration or "fading" on any of the images. BTW, I've mentioned a few times the total USA abandonment of graded paper production. Can you recommend any one, two, or three European sources which make a practice of shipping to the States? Dan Mmmh. I can give you the links to some shops I know... some of them still list and sell various kinds of graded paper, others have abandoned it. there isn´t that much more left to choose from. I know a few shops who just got rid of their last boxes of Tetenal graded papers. Robert is in the Netherlands, but at least he ships to Germany. Maybe the US, too. Ask him. http://www.fotohuisrovo.nl/eng/frame.html He is selling papers by Foma, Maco and Amaloco (rebadged Ilford, Efke). Fomaspeed and Fomabrom are graded kinds. Fomabrom and Fomaspeed are available as well from Fotoimpex, Berlin. Mirko recently (03-2003) got involved with "Jay and C", they might be able to sell it via their shop in Kansas. If not, Mirko asks a flat rate of 15EUR to cover the shipping costs. www.fotoimpex.de www.fotoimpex.us http://www.jandcphotography.com/ Last time I checked their website, Tura of Dueren manufactured still graded paper - they cut premanufactured stuff, bought in bulk presumedly from Agfa. http://www.tura-film.de/en/0220.html Ask them wether they got something left ove r. Some guys still sell rolls of Orwo paper, manufactured in the late 1980s. I am using up some dozen packs of 7x10cm Orwo FB for 6x9cm contacts, very nice paper. I wish I would have that in bigger sizes. Hope this helps! Gruss, Roman |
#8
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Graded papers ( Sludge in Paper Developer)
Roman J. Rohleder wrote
Dan Quinn schrieb: If that is silver it must have migrated from the emulsion into the developer and likely prior to reduction. I don't think that possible. It happened to me... so, it seems to be possible. ;-) I experienced this with all developers I tried but... Well it's the first time I ever heard of that. Perhaps it's more common than thought; film and paper. I could'nt be due to the water, could it? Developers are alkaline and can precipitate metalic salts. Dan |
#9
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Graded papers ( Sludge in Paper Developer)
Let me add http://www.silverprint.co.uk/
Richard "Roman J. Rohleder" wrote in message news (Dan Quinn) schrieb: I've seen ORWO N113 listed as a safelight and a developer. Labor & Dunkelkammer list the developer. It is a developer. If that is silver it must have migrated from the emulsion into the developer and likely prior to reduction. I don't think that possible. It happened to me... so, it seems to be possible. ;-) I experienced this with all developers I tried but Ilford Multigrade, with many papers, ranging from MG4, Polygrade5 and Orwo graded fb paper. Developing time is not an issue with this, it just happens. I can't imagine it would be a good thing. Think of the image being leached, before or after reduction, into the developer. I never noticed any degration or "fading" on any of the images. BTW, I've mentioned a few times the total USA abandonment of graded paper production. Can you recommend any one, two, or three European sources which make a practice of shipping to the States? Dan Mmmh. I can give you the links to some shops I know... some of them still list and sell various kinds of graded paper, others have abandoned it. there isn´t that much more left to choose from. I know a few shops who just got rid of their last boxes of Tetenal graded papers. Robert is in the Netherlands, but at least he ships to Germany. Maybe the US, too. Ask him. http://www.fotohuisrovo.nl/eng/frame.html He is selling papers by Foma, Maco and Amaloco (rebadged Ilford, Efke). Fomaspeed and Fomabrom are graded kinds. Fomabrom and Fomaspeed are available as well from Fotoimpex, Berlin. Mirko recently (03-2003) got involved with "Jay and C", they might be able to sell it via their shop in Kansas. If not, Mirko asks a flat rate of 15EUR to cover the shipping costs. www.fotoimpex.de www.fotoimpex.us http://www.jandcphotography.com/ Last time I checked their website, Tura of Dueren manufactured still graded paper - they cut premanufactured stuff, bought in bulk presumedly from Agfa. http://www.tura-film.de/en/0220.html Ask them wether they got something left ove r. Some guys still sell rolls of Orwo paper, manufactured in the late 1980s. I am using up some dozen packs of 7x10cm Orwo FB for 6x9cm contacts, very nice paper. I wish I would have that in bigger sizes. Hope this helps! Gruss, Roman |
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