Fun with salt prints.

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Vaughn

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The professor of our advance photo class (which meets every Friday, 8am -2pm) asked me to buy supplies (silver nitrate, sea salt, paper and brushes) for a day of salted print making.

So being an alt photo sort of guy and never having made salt prints before, I read up on the process, order the supplies, and the night before the class whipped up a gelatin, sodium citrate and ammoniun chloride solution and soaked about 16 sheets of Crane's Kid Finish, just to get a sort of a head start for the next day. I fretted about how to get organized for 22 students to make good salt prints over a four hour period.

Turned out the prof had a more simpler plan -- coat the paper by brush with sea salt solution (1 tablespoon per liter), use hair driers to dry that, coat with silver nitrate solution, dry and print.

I did sneak some sodium citrate into the salt solution and some sea salt into the first rinse (he was going to use just tap water). After another rinse, the paper went into the 10% hypo then a wash.

Students used camera negatives, enlarged negatives, cut out magazine images, drawings, made photograms anr/or combinations of all the above.

The point is, is that the students had a blast, they got images, and they were introduced to something beyond store-bought photopaper and inkjet images. Who knows how well the prints were cleared and fixed, how long they will last, et al.

Sometimes it is just suppose to be fun.

Vaughn
 
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Vaughn

Vaughn

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PS...I just posted the print I made with the class in the subscriber's gallery.

vaughn
 
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Vaughn

Vaughn

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I hadn't heard of using salt in the first rinse. Is there a reason for that?

From Christopher James', The Book of Alternative Photographic Processes, second edition...

paraphrased... the purpose of a slight acidic salt bath (right after exposure) precipitates free (or excess) silver by creating silver chloride. He states that when toning, gold will not adhere to the silver if there is still free silver in the print...and free silver will make fixing more difficult.

He suggests 10g citric acid and 30g kosher salt per liter water. I just added some sea salt to the first rinse to help with out with our rather quick processing. We did 5 minutes in the salt bath, 5 minutes in running water, then 5 minutes in 10% hypo...then a 15 to 20 minute wash.

Christopher does mention that over-doing the first salt bath can lighten the print some (too much salt or too much time in the salt bath)...but could be used to clear highlights if needed.

I thumb tacked my print up on the wall and I'll see if it changes any over the next week or so.

Vaughn
 

Sanjay Sen

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Vaughn, considering that the negative of the print you posted was processed much earlier, was it developed for silver printing, or did you develop it with alt processes in mind? I've read that salt printing requires a negative with a much higher contrast than one developed for silver printing.

Your first effort with salt printing was very good!
 
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Vaughn

Vaughn

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Vaughn, considering that the negative of the print you posted was processed much earlier, was it developed for silver printing, or did you develop it with alt processes in mind? snip

I picked the negative I was going to print from at the last moment. I flash thru my 5x7 negatives, checked this one out and saw that it was quite "beefy" and have always likes the neg (it does make a fine silver gelatin contact print also...on older grade 2 paper).

I had exposed the sides of the lion (in the shade) at almost Zone V...and pretty much let the rest of the scene take care of itself, with the help of a yellow filter. So the brightest parts of the scene fell up on Zone X or so. I was not keeping dev records at the time, but it was probably tray developed in HC-110 at about "normal". I would hate to have to enlarge the negative onto silver gelatin paper, I think the density and contrast would be hard to handle.

So I think I lucked out on getting a beefy neg. I started experimenting with carbon printing at about this time, so not long after this negative I started to keep better track of my film developing in an attempt to match process with negative quality.

vaughn
 
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