Re: [pinhole-discussion] Greetings and paper negative info
Don, Welcome to the board. Thank you for sharing your method with us. It sounds quite interesting and I'd like to give it a try. Keep coming back. Best, leezy
[pinhole-discussion] Greetings and paper negative info
Hi all, I've been quite the stealthy reader of the list for some time, so I figured I'd pop my head in and say hello to everyone. This is an exciting and informative bunch - and I hope I can add a bit here. By the way, I'm number 170 on the pinhole day site. I've been an off and on pinholer for a few years now and am recently back in college, exploring and experimenting with it again. With all the talk regarding paper negatives I thought I would add a small bit of information. I have recently started using panalure for making paper negatives in camera - this gives a full range of tones similar to film as opposed to the ilford rc with the contrasty response. While you can use this as the final negative by printing through it, some people have found the back printing to be a distraction. I have been using another method with great success. Basically the procedure is this: 1. Shoot panalure in camera 2. Develop, fix, and wash normally (I use sprint chemistry, anything works though) (remember to do all the developing in the dark w/ no safelight - bad fog, bad bad fog.) 3. Scan the image and rework in photoshop as much as your conscience allows. 4. Output the negative image on regular copy or printer paper (the thinner paper, the better) - I use an Epson 875dc. 5. Use this negative (enlarged and curve corrected) for making prints with. The regular paper being thinner allows light to pass at a greater rate than the panalure - no waxing necessary. The shadows have a distinct calotype look, as the paper texture is quite evident, not distracting - but unique. Some highlights show a wonderful grain pattern. Additionally, if you do not want the paper texture, you can output to overhead transparency film. It's a pleasure to be apart of this group, and I hope this gives great motivation for your own work! Don GET INTERNET ACCESS FROM JUNO! Juno offers FREE or PREMIUM Internet access for less! Join Juno today! For your FREE software, visit: http://dl.www.juno.com/get/web/.
Re: [pinhole-discussion] Re: translation GORDY EMERY
- Original Message - From: ragowaring ragowar...@btinternet.com (or kerosen para ti Guillermo). Oh si, señor Alexis, ahora recuerdo, muchas gracias. Translation: Oh yes, Mister Alexis, now I remember. I remember seeing many years ago kerosene stoves. The kerosene gas was inside an upside down placed reservoir (much like the tank in a water cooler) and by capillary action brought to the tip of a wick, very low tech, much in tune with pinhole (to keep it in topic :-) Guillermo Translation: William
Re: [pinhole-discussion] Double Slit
Hi! I really would like to try the dual slit camera. But I don't have a clear idea what a constructed camera looks like? Could someone post or e-mail a picture? Or point me in a direction to see one. Thanks Mac Hi Joao, Check this URL: http://www.???/discussion/upload/gallery2001.php It will bring you to the discussion list gallery. If you go to the next page, there are a couple of two-slit images that I posted on Nov 5. They are pretty distorted: characteristic of two-slit photos made with curved or crooked slits. The couple of images that I've made with two perpendicular slits are sharp and the image is stretched along the axis of the slit closest to the film. Unfortunately, I don't have them in electronic form. There are examples in both editions of Eric Renner's book and in the Pinhole Journal vol 15 nbr 1. Tom
Re: [pinhole-discussion] Double Slit
Hi Joao, Check this URL: http://www.???/discussion/upload/gallery2001.php It will bring you to the discussion list gallery. If you go to the next page, there are a couple of two-slit images that I posted on Nov 5. They are pretty distorted: characteristic of two-slit photos made with curved or crooked slits. The couple of images that I've made with two perpendicular slits are sharp and the image is stretched along the axis of the slit closest to the film. Unfortunately, I don't have them in electronic form. There are examples in both editions of Eric Renner's book and in the Pinhole Journal vol 15 nbr 1. Tom - Original Message - From: Joao Ribeiro jribe...@greco.com.br To: pinhole-discussion@p at ??? Sent: Thursday, November 29, 2001 2:59 PM Subject: [pinhole-discussion] Double Slit Hi folks, I was wondering what would be the difference between a pinhole and a double slit image? Can anyone help me with that? Do they look different? Where can I see one? Thanks in advance Joao ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/
[pinhole-discussion] Double Slit
Hi folks, I was wondering what would be the difference between a pinhole and a double slit image? Can anyone help me with that? Do they look different? Where can I see one? Thanks in advance Joao
RE: [pinhole-discussion] reciprocity failure of paper negs.
-Original Message- From: Bill Erickson [mailto:erick...@hickorytech.net] I get the message. More is better, but don't forget to go to bed. Actually, going to bed is ok - just remember to wake up. Here's a wonderful example: http://www.pinholeday.org/2001/photo_63.html :) Gregg - Original Message - From: Guy Glorieux To: pinhole-discussion@p at ??? Sent: Thursday, November 29, 2001 6:47 AM Subject: Re: [pinhole-discussion] reciprocity failure of paper negs. Bill Erickson wrote: I'm planning an image of a dark corner in an old building. The exposure calculates out to about five days with a paper negative. At what exposure time does one begin to run into reciprocity failure with paper, and what are the parameters? Bill, I wrote a little piec last year entitled Reciprocity Nightmare which may be relevant here and which went as follows (hope it is of help): I had a dream... It was a dark, lonely night and I was out with my 8x10 PH camera. The New Moon was further darkened by an incredibly rare simultaneous eclipse of the sun and the moon. I could barely see my hands and feet as I walked to the scene I was about to shoot for that winning picture for the First International Nocturne Pinhole Exhibition. Ten times before leaving I had checked that my film holders were fully loaded with film. A single word kept swirling in my mind:r e c i p r o c i t y I must not fail, I must not fail, I kept repeting to myself in the darkness of the darkest forest. Formulas kept poping up in my mind: 10% compound; one-over-the square-root of the inverse of the sunny-16 times three times the speed of my film; add twice the diameter of my pinhole divided by the focal length of my camera to the exposure time estimated for the 3rd f-stop on my right and multiply the cosinus by the coefficient of uncertainty... I knew I could do it. How could I fail with all this simple mathematics so well spelled out on The list. Something tryied to grab me in the dark. I gave it a sharp blow and the thing went blonk. Nothing could stop me from winning the top prize of the Nocturne Pinhole Exhibition at Pinhole Vision. Finally I reached the scene. It was a wonderful landscape I had spotted two days ago after hours of walk in the country side. I set the camera on the tripod. The temperature was a chilling 25 below freezing but I was well covered for a long wait. With my flashlight, I carefully read the spotmeter's reading and worked out the reciprocity factor on my PDA. 258 hours, 64 minutes and 12 seconds... Hmmm... Add a couple hours, just to make sure... It was just that simple! I knew I could do it. But, rats, I suddenly realized that the final deadline for submitting the print was tomorrow with an exposure time of well over 10 days. I forgot to factor that into my equation... -:(( Guy Glorieux
Re: [pinhole-discussion] reciprocity failure of paper negs.
I get the message. More is better, but don't forget to go to bed. - Original Message - From: Guy Glorieux To: pinhole-discussion@p at ??? Sent: Thursday, November 29, 2001 6:47 AM Subject: Re: [pinhole-discussion] reciprocity failure of paper negs. Bill Erickson wrote: I'm planning an image of a dark corner in an old building. The exposure calculates out to about five days with a paper negative. At what exposure time does one begin to run into reciprocity failure with paper, and what are the parameters? Bill, I wrote a little piec last year entitled Reciprocity Nightmare which may be relevant here and which went as follows (hope it is of help): I had a dream... It was a dark, lonely night and I was out with my 8x10 PH camera. The New Moon was further darkened by an incredibly rare simultaneous eclipse of the sun and the moon. I could barely see my hands and feet as I walked to the scene I was about to shoot for that winning picture for the First International Nocturne Pinhole Exhibition. Ten times before leaving I had checked that my film holders were fully loaded with film. A single word kept swirling in my mind:r e c i p r o c i t y I must not fail, I must not fail, I kept repeting to myself in the darkness of the darkest forest. Formulas kept poping up in my mind: 10% compound; one-over-the square-root of the inverse of the sunny-16 times three times the speed of my film; add twice the diameter of my pinhole divided by the focal length of my camera to the exposure time estimated for the 3rd f-stop on my right and multiply the cosinus by the coefficient of uncertainty... I knew I could do it. How could I fail with all this simple mathematics so well spelled out on The list. Something tryied to grab me in the dark. I gave it a sharp blow and the thing went blonk. Nothing could stop me from winning the top prize of the Nocturne Pinhole Exhibition at Pinhole Vision. Finally I reached the scene. It was a wonderful landscape I had spotted two days ago after hours of walk in the country side. I set the camera on the tripod. The temperature was a chilling 25 below freezing but I was well covered for a long wait. With my flashlight, I carefully read the spotmeter's reading and worked out the reciprocity factor on my PDA. 258 hours, 64 minutes and 12 seconds... Hmmm... Add a couple hours, just to make sure... It was just that simple! I knew I could do it. But, rats, I suddenly realized that the final deadline for submitting the print was tomorrow with an exposure time of well over 10 days. I forgot to factor that into my equation... -:(( Guy Glorieux
Re: [pinhole-discussion] reciprocity failure of paper negs.
reciprocity nightmare ' great stuff , thank you...regards mickey a happy life is made up of many happy moments
Re: [pinhole-discussion] reciprocity failure of paper negs.
Bill Erickson wrote: I'm planning an image of a dark corner in an old building. The exposure calculates out to about five days with a paper negative. At what exposure time does one begin to run into reciprocity failure with paper, and what are the parameters? Bill, I wrote a little piec last year entitled Reciprocity Nightmare which may be relevant here and which went as follows (hope it is of help): I had a dream... It was a dark, lonely night and I was out with my 8x10 PH camera. The New Moon was further darkened by an incredibly rare simultaneous eclipse of the sun and the moon. I could barely see my hands and feet as I walked to the scene I was about to shoot for that winning picture for the First International Nocturne Pinhole Exhibition. Ten times before leaving I had checked that my film holders were fully loaded with film. A single word kept swirling in my mind:r e c i p r o c i t y I must not fail, I must not fail, I kept repeting to myself in the darkness of the darkest forest. Formulas kept poping up in my mind: 10% compound; one-over-the square-root of the inverse of the sunny-16 times three times the speed of my film; add twice the diameter of my pinhole divided by the focal length of my camera to the exposure time estimated for the 3rd f-stop on my right and multiply the cosinus by the coefficient of uncertainty... I knew I could do it. How could I fail with all this simple mathematics so well spelled out on The list. Something tryied to grab me in the dark. I gave it a sharp blow and the thing went blonk. Nothing could stop me from winning the top prize of the Nocturne Pinhole Exhibition at Pinhole Vision. Finally I reached the scene. It was a wonderful landscape I had spotted two days ago after hours of walk in the country side. I set the camera on the tripod. The temperature was a chilling 25 below freezing but I was well covered for a long wait. With my flashlight, I carefully read the spotmeter's reading and worked out the reciprocity factor on my PDA. 258 hours, 64 minutes and 12 seconds... Hmmm... Add a couple hours, just to make sure... It was just that simple! I knew I could do it. But, rats, I suddenly realized that the final deadline for submitting the print was tomorrow with an exposure time of well over 10 days. I forgot to factor that into my equation... -:(( Guy Glorieux
Re: [pinhole-discussion] translation GORDY
Be sure you use white and not yellow vaseline. Gordy From: Hugues Mertens asve...@skynet.be Reply-To: pinhole-discussion@p at ??? To: pinhole-discussion@p at ??? Subject: [pinhole-discussion] translation Date: Thu, 29 Nov 2001 09:53:52 +0100 I'm sorry for the translation about the formula I assume the paraffin is neither the petrol used in those old fashion lamps nor kerosene. Sometimes the word paraffin is used for that kind of solid white wax used as a lubricant and antioxidant but also as a laxative in pharmacology (it's derived from petrol). I think you could replace it advantageously by the same quantity of vaseline, the constitution is almost the same as paraffin but it's transparent and liquid. (I don't know if you use the same denomination in the United States) Camphrotated oil is often use as a component in embrocations or liniments. Nevertheless, some badmouthing people relates that you can find it in coffee in the army because it's the contrary of aphrodisiacs (But it's probably a legend)...;-) Hugues -- Atelier de Photographie Hugues Mertens http://users.skynet.be/asveyou ___ Pinhole-Discussion mailing list Pinhole-Discussion@p at ??? unsubscribe or change your account at http://www.???/discussion/ _ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp
Re: [pinhole-discussion] Re: translation GORDY EMERY
In a message dated 11/29/01 8:20:21 AM, jribe...@greco.com.br writes: Anyway, whoever got a good formula I'm interested in knowing. In the past, using single weight, FB paper, I rubbed the back of the paper with light Crisco oil to make the negative more transparent for dodging and burning. It was moderately successful. My recollection is that it was a very dark negative and I think a lighter one would work better for this technique. In addition, a very beautiful grain resulted. leezy
Re: [pinhole-discussion] Re: translation GORDY EMERY
Hi Alexis, Paraffin oils have a boiling point in the range of 150 - 300 degrees Centigrade while the wax has one between 50 and 60 degrees. Paraffin wax is used for all sorts of things includeing cheap candles and waxed paper. Actually I think you mean that paraffin has a melting point of about 60 o C Camphorated oil on the other hand I would suspect is not strictly necessary. The oil part yes, but the camphor part was probably used as a preservative as some of you may remember camphor balls or mothball ususally consisting of napthalene and sometimes, yes you've guessed it, camphor. Therefore, camphorated oil was probably used as an amplication for preseving perishable non edible goods in the days of moths. Now all of this is some educated conjecture but I hope it is of use to you. I would think that oil would be sufficient. It's hard to say, in the wet plate process they used to varnish the plate with gum sandarac and in the formula they recommend oil of lavender. The oil is added for flexibility and, as I was told, it has to be lavender. I tried oiling papers with sunflower oil, it works fine but it goes rancid over time and smells pretty bad, so maybe the preservative is important. Paraffin (solid thing) works fine but the paper is fragile after, it marks easily (at least thin paper I use with ink jet printers). I have an old formula here that I have never tried, but maybe it works, who knows, it says: To make paper transparent: Dip the paper in a bath at 80 o C of: Parafin (solid) . 40 gr. Linsen oil 10 gr. After the paper take up all the solution it cans, drain it fast and put it between 2 sheets of blotting paper. Will it work? Who knows, but why does he give the amount of oil in gr and not in ml? This formula dates from 1905, found it in a paper I have here and it has other curiosities. I am just looking up in a dictionary that camphor itself is a whitish, translucent crystaline, pleasant-smelling terpene ketone, whatever that means except that most ketones smell nice from what I can remember at school, used in medicine and in the manufacture of celluloid. Ah ha! There it is, the manufacture of celluloid. Is that not what one is doing when applying the camphorated oil to the paper with paraffin? Probably not. Will sulfuric acid damage the gelatin part of the photo paper? I am working with an Arjo Wiggins Parchment paper called Linaje and they told me that the transparency is obtained by immersing the paper in a solution of sulfuric acid, washing, neutralising and buffering it after. Anyway, whoever got a good formula I'm interested in knowing. Cheers Joao P.S. I have an old formula for turning the wood black, but I don't know how to translate it, maybe Guillermo will help, it says: Extrato de Pau de Campeche .. 15 gr. (what the ... is that?) Cromato de Potassa ... 2 gr. (I believe it is Alumem de cromo ) Agua .. 1000 gr. He says to dissolve the Campeche first in hot water and add the Cromato. The solution is dark violet and becomes black in contact with the wood.
[pinhole-discussion] translation
I'm sorry for the translation about the formula I assume the paraffin is neither the petrol used in those old fashion lamps nor kerosene. Sometimes the word paraffin is used for that kind of solid white wax used as a lubricant and antioxidant but also as a laxative in pharmacology (it's derived from petrol). I think you could replace it advantageously by the same quantity of vaseline, the constitution is almost the same as paraffin but it's transparent and liquid. (I don't know if you use the same denomination in the United States) Camphrotated oil is often use as a component in embrocations or liniments. Nevertheless, some badmouthing people relates that you can find it in coffee in the army because it's the contrary of aphrodisiacs (But it's probably a legend)...;-) Hugues -- Atelier de Photographie Hugues Mertens http://users.skynet.be/asveyou
Re: [pinhole-discussion] Re: translation
Paraffin in the UK is known as kerosene when you use it in jet aircraft :-) b2myo...@aol.com () wrote: Thank you, Katharine. There are many Europeans reading this board now. Can you help us unravel ths parrafin mystery? It would be very much appreciated. Thank you. leezy
