Date   

Re: THE OTHER JOHN STOCKDALE

ender100
 

Bob,

Have you tried Hawaiian Punch?


Hehehehehe

Best,
Mark Nelson

On Apr 11, 2021, at 9:49 AM, BOB KISS <bobkiss@...> wrote:

DEAR LIST,
            Does anyone remember the John Stockdale in NYC referred to by Judy Seigel in WJPFP?  I specifically recall that he did a pineapple juice final rinse of his cyanotypes to bump up the color!  The John Stockdale on the Pure Silver list is not the same guy and lives in Australia.  Anyone?
                                                CHEERS!
                                                            BOB
 
<image001.jpg>
 


THE OTHER JOHN STOCKDALE

BOB KISS
 

DEAR LIST,

            Does anyone remember the John Stockdale in NYC referred to by Judy Seigel in WJPFP?  I specifically recall that he did a pineapple juice final rinse of his cyanotypes to bump up the color!  The John Stockdale on the Pure Silver list is not the same guy and lives in Australia.  Anyone?

                                                CHEERS!

                                                            BOB

 

Bob Kiss MGM Logo low res CROPPED email signature

 


Re: fixxons

Niranjan Patel
 

The geniuses in the marketing department got the wind of the high praise folks in alternative world were lavishing about the low price and great quality of their regular material compared to the 4x more expensive Pictorico.  So they came up with a "new and improved" stuff dedicated to making digital negatives and priced it higher, still considerably lower than the competition, to capture some of the price differential.


:Niranjan.


Re: fixxons

Terry Glass
 

Thanks for pointing this out Christina. I have used the $29/100 and the same 11x17/50 for $58 versions as well. 
Just used some with MK ink on my P800 and sticks well and no grain with Yellow, LK and LLK mix in the highlights.
Interested too in differences besides price.🤔

All the Best,
Terry Glass

On Apr 10, 2021, at 3:59 PM, Christina Z. Anderson <christinazanderson@...> wrote:

Ever since I read about Fixxons I’ve been using that only. $29 for 100 sheets is awesome. 

Now I notice that they are producing two different films.

The one I use is the Screen Positive here:

The new one is for alt here:

But I find that kind of funny nomenclature since film is film and both can be used for negatives or positives.

Anyone have experience with this new kind? It’s $20 more expensive for 100 sheets. Both are 5 ml thickness.

Chris


fixxons

Christina Z. Anderson
 

Ever since I read about Fixxons I’ve been using that only. $29 for 100 sheets is awesome. 

Now I notice that they are producing two different films.

The one I use is the Screen Positive here:

The new one is for alt here:

But I find that kind of funny nomenclature since film is film and both can be used for negatives or positives.

Anyone have experience with this new kind? It’s $20 more expensive for 100 sheets. Both are 5 ml thickness.

Chris


Re: Alkaline fixers and lumen prints

Cedric Muscat
 



Looks like the acid fix has better tonal rendition in the steps 7 - 21 range.


On Tue, 6 Apr 2021 at 19:31, Christina Z. Anderson <christinazanderson@...> wrote:
Dear All,

In 10 tests on 10 different papers some papers looked about the same with both alkaline and acid fix (and stabilizer). Many were slightly darker and slightly more reddish in tone with an acid fix aka Sprint. 

There was not one case where I preferred the alkaline fix or where the alkaline fixer should be required. 

But the real surprise was this paper which is either Bergger VCCM or Forte, can’t tell—two envelopes in one box unlabeled, but I will have a separate piece of each from their own packets this week to test. 

The alkaline fix is on the left and the acid on the right with such a marked color change. It may not show in this image but it’s a beautiful purple. 

How I conducted the test was one piece of paper with two step wedges on top, exposed all day sun, cut in half just before fixing, fixed in two separate trays for the same time.

It is probably not possible to make firm conclusions with all things lumen, but for me an alkaline fix is no longer. Two other people are also testing and we’ll see if this is consistent for them, too, so it’s not just me. 

I can’t discount that there is something else in Sprint that accounts for such a color difference.

The end.

Chris

Sprint Record Fixer
Ammonium Thiosulfate 80-90% 
Potassium Tetraborate Tetrahydrate <10% 
Potassium Borate <10% 
Potassium Acetate <10% 
Sodium Metaborate Dihydrate <3% 
Sodium Sulfite <2% 
Sodium Metabisulfite <2%



On Apr 1, 2021, at 9:19 AM, Christina Z. Anderson <christinazanderson@...> wrote:

Good morning!

(I am SO thrilled we can post pix).

I’ve been running a lot of lumen print tests to quantify some things, one of which is the use of an alkaline vs acid fixer to reduce fading of the colors.

I’ve done two tests now with an 8x10 Stouffers, exposed outside all day 9-6 full sun, print then cut in half, one fixed in Sprint (6 pH) and one in Formulary TF-4 (8 pH). The first time I did this I was very surprised to see a slight difference—a bit lighter color—in the alkaline fixed half.

So I did the test again and sure enough, same thing. Left is alkaline, right is acid.

I’m going to do a couple more of these on different papers but if it were based on these two tests alone I can’t support the theory of an alkaline fix reducing fading of colors. (Note: prints are still wet here and have not dried down to full darkness but the other test dried down was exactly the same, also different paper).

Has anyone else done this too? Does anyone have acid and alkaline fixes and can do a side by side? I’m going to use citric and sodium carbonate to “prime” the two fixes and do it again, too..both of the fixers I tested are ammonium thiosulfate with added ingredients.

I will measure densities with a densitometer to make sure it’s not just a color shift but an actual density dif, too.

Chris

<IMG_0127.JPG>



Re: Alkaline fixers and lumen prints

Christina Z. Anderson
 

Dear All,

In 10 tests on 10 different papers some papers looked about the same with both alkaline and acid fix (and stabilizer). Many were slightly darker and slightly more reddish in tone with an acid fix aka Sprint. 

There was not one case where I preferred the alkaline fix or where the alkaline fixer should be required. 

But the real surprise was this paper which is either Bergger VCCM or Forte, can’t tell—two envelopes in one box unlabeled, but I will have a separate piece of each from their own packets this week to test. 

The alkaline fix is on the left and the acid on the right with such a marked color change. It may not show in this image but it’s a beautiful purple. 

How I conducted the test was one piece of paper with two step wedges on top, exposed all day sun, cut in half just before fixing, fixed in two separate trays for the same time.

It is probably not possible to make firm conclusions with all things lumen, but for me an alkaline fix is no longer. Two other people are also testing and we’ll see if this is consistent for them, too, so it’s not just me. 

I can’t discount that there is something else in Sprint that accounts for such a color difference.

The end.

Chris

Sprint Record Fixer
Ammonium Thiosulfate 80-90% 
Potassium Tetraborate Tetrahydrate <10% 
Potassium Borate <10% 
Potassium Acetate <10% 
Sodium Metaborate Dihydrate <3% 
Sodium Sulfite <2% 
Sodium Metabisulfite <2%



On Apr 1, 2021, at 9:19 AM, Christina Z. Anderson <christinazanderson@...> wrote:

Good morning!

(I am SO thrilled we can post pix).

I’ve been running a lot of lumen print tests to quantify some things, one of which is the use of an alkaline vs acid fixer to reduce fading of the colors.

I’ve done two tests now with an 8x10 Stouffers, exposed outside all day 9-6 full sun, print then cut in half, one fixed in Sprint (6 pH) and one in Formulary TF-4 (8 pH). The first time I did this I was very surprised to see a slight difference—a bit lighter color—in the alkaline fixed half.

So I did the test again and sure enough, same thing. Left is alkaline, right is acid.

I’m going to do a couple more of these on different papers but if it were based on these two tests alone I can’t support the theory of an alkaline fix reducing fading of colors. (Note: prints are still wet here and have not dried down to full darkness but the other test dried down was exactly the same, also different paper).

Has anyone else done this too? Does anyone have acid and alkaline fixes and can do a side by side? I’m going to use citric and sodium carbonate to “prime” the two fixes and do it again, too..both of the fixers I tested are ammonium thiosulfate with added ingredients.

I will measure densities with a densitometer to make sure it’s not just a color shift but an actual density dif, too.

Chris

<IMG_0127.JPG>



Re: Coating gum

John Brewer
 

Thanks Jim and Don


On 2 Apr 2021, at 2:06 am, Jim Patterson, <jimbobnola@...> wrote:

That is 1.5 mil wet film thicknesses.


On Apr 1, 2021, at 8:04 PM, Jim Patterson, <jimbobnola@...> wrote:

Hi, I use a 15 mil (0.015 inch) wire coating rod for gum.  That lays down a wet film thickness of 1.5 ml.  The final dry film thickness depends on the % solids in the wet coating.  I use RDS coating rods, New Jersey, USA.
Jim


On Apr 1, 2021, at 12:41 PM, Niranjan Patel via groups.io <nirpat89@...> wrote:

I wonder if anyone has tried an air-brush for this purpose.  That might an option instead of bull blown industrial spray gun - requiring a ventilated booth.  No dichromate though.  Spraying that would be a no-no under any conditions.


:Niranjan.


Re: Alkaline fixers and lumen prints

Christina Z. Anderson
 

Nope not yet! One more thing to try.
Chris

On Apr 1, 2021, at 3:57 PM, Anne Eder <chansonette@gmail.com> wrote:

Christina—
One more thing! Have you tried lumens on Ortho litho film yet? It works a treat!! And fixes easier.

Be well,
Anne

On Apr 1, 2021, at 5:45 PM, Anne Eder via groups.io <chansonette=gmail.com@groups.io> wrote:

Yes! I can’t believe I didn’t think of it!
It’s a design magazine so of course they did!

Anne

On Apr 1, 2021, at 5:34 PM, Christina Z. Anderson <christinaZanderson@gmail.com> wrote:



One thing I did get from this feature was that I can use Pantone swatches on my boxes of paper so that I remember which paper generates what palette of colors!
OMG what a great idea!!!












Re: What is a correct formula for gelatin+glutaraldehyde paper sizing

Don Nelson
 

Its a coating rod

When you order you will need to decide on length and allow at least an inch extra on each end ( makes a blind end)
Have them drill a hole on one end - you can use a piece of stainless wire to lift it out of a vertical hot water bath ( I constructed mine from black plumbers pipe and fittings, and use an electric tea kettle to heat the water). Dry the rod before coating.
Don
Ps on rd90 and rd200 rods, used by some carbon printers, they stock 12 foot lengths to cut off to your dimensions. Saves a setup charge. Before this happened, I used to organize a couple of group buys to distribute the setup charge


On Apr 2, 2021, at 11:59 AM, John Brewer <johnbrewerphotography@...> wrote:

Hey Don

What’s an RD90 rod? Google isn’t helping me!

John


On 2 Apr 2021, at 6:14 pm, Don Nelson <ac7zg@...> wrote:

And you might want to mix smaller amounts as it starts to immediately crosslink in solution
I coat 2  12x15 sheets at a time with just 100ml size plus 0.8 gm glut, using a coating rod to spread. A hot rod with eliminate bubbles in the sizing
( rod is a RD90)
Don


On Apr 2, 2021, at 10:10 AM, Don Nelson <ac7zg@...> wrote:

You can use up to 0.9 ml 3% glut solution per 100ml of gelatin sizing (I use 5% gelatin)
More than that and you will start forming polyglut. Polyglut will give a yellow stain in the size and cannot be removed.
Very little glut can actually be used. Two active bonding sites on the glut molecule means a lot of crosslinking activity with gelatin
Don Nelson 


On Apr 2, 2021, at 8:22 AM, job.westerduin@... wrote:

Hi, i have experimented with gum printing (trail and error,, and i will to start serious first gum printing with a cyanotype as starting layer base this weekend or later.

I have a pot glutaraldehyde from Rollei Black Magic emulsion set, that was left over from my previous silver photopaper enlarging hobby
How many glut and gelatin per 1 liter water.

Greeting Job from The Netherlands. 
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Re: What is a correct formula for gelatin+glutaraldehyde paper sizing

John Brewer
 

Hey Don

What’s an RD90 rod? Google isn’t helping me!

John


On 2 Apr 2021, at 6:14 pm, Don Nelson <ac7zg@...> wrote:

And you might want to mix smaller amounts as it starts to immediately crosslink in solution
I coat 2  12x15 sheets at a time with just 100ml size plus 0.8 gm glut, using a coating rod to spread. A hot rod with eliminate bubbles in the sizing
( rod is a RD90)
Don


On Apr 2, 2021, at 10:10 AM, Don Nelson <ac7zg@...> wrote:

You can use up to 0.9 ml 3% glut solution per 100ml of gelatin sizing (I use 5% gelatin)
More than that and you will start forming polyglut. Polyglut will give a yellow stain in the size and cannot be removed.
Very little glut can actually be used. Two active bonding sites on the glut molecule means a lot of crosslinking activity with gelatin
Don Nelson 


On Apr 2, 2021, at 8:22 AM, job.westerduin@... wrote:

Hi, i have experimented with gum printing (trail and error,, and i will to start serious first gum printing with a cyanotype as starting layer base this weekend or later.

I have a pot glutaraldehyde from Rollei Black Magic emulsion set, that was left over from my previous silver photopaper enlarging hobby
How many glut and gelatin per 1 liter water.

Greeting Job from The Netherlands. 


Re: What is a correct formula for gelatin+glutaraldehyde paper sizing

Don Nelson
 

Here is what I use

Its just a common cleaner and works well
No fumes like formalin or glyoxyl
No waiting like formalin- it’s ready when dry


On Apr 2, 2021, at 10:54 AM, Job Westerduin <job.westerduin@...> wrote:


Oh i have a idea to neutralize the paper afterwards with a  bath of baking soda+water..

Or is that noy good idea?

Op vr 2 apr. 2021 19:47 schreef Job Westerduin via groups.io <job.westerduin=gmail.com@groups.io>:
Hi thanks for answers,
I found a safety material sheet from Rollai-Maco from Germany. (Screenshot)

There is 2-5 pct of glut in there.
But the two another addidives might be give problems with sizing, this makes paper acid.



Op vr 2 apr. 2021 19:14 schreef Don Nelson <ac7zg@...>:
And you might want to mix smaller amounts as it starts to immediately crosslink in solution
I coat 2  12x15 sheets at a time with just 100ml size plus 0.8 gm glut, using a coating rod to spread. A hot rod with eliminate bubbles in the sizing
( rod is a RD90)
Don


On Apr 2, 2021, at 10:10 AM, Don Nelson <ac7zg@...> wrote:

You can use up to 0.9 ml 3% glut solution per 100ml of gelatin sizing (I use 5% gelatin)
More than that and you will start forming polyglut. Polyglut will give a yellow stain in the size and cannot be removed.
Very little glut can actually be used. Two active bonding sites on the glut molecule means a lot of crosslinking activity with gelatin
Don Nelson 


On Apr 2, 2021, at 8:22 AM, job.westerduin@... wrote:

Hi, i have experimented with gum printing (trail and error,, and i will to start serious first gum printing with a cyanotype as starting layer base this weekend or later.

I have a pot glutaraldehyde from Rollei Black Magic emulsion set, that was left over from my previous silver photopaper enlarging hobby
How many glut and gelatin per 1 liter water.

Greeting Job from The Netherlands. 


Re: What is a correct formula for gelatin+glutaraldehyde paper sizing

Job Westerduin
 

Oh i have a idea to neutralize the paper afterwards with a  bath of baking soda+water..

Or is that noy good idea?

Op vr 2 apr. 2021 19:47 schreef Job Westerduin via groups.io <job.westerduin=gmail.com@groups.io>:

Hi thanks for answers,
I found a safety material sheet from Rollai-Maco from Germany. (Screenshot)

There is 2-5 pct of glut in there.
But the two another addidives might be give problems with sizing, this makes paper acid.



Op vr 2 apr. 2021 19:14 schreef Don Nelson <ac7zg@...>:
And you might want to mix smaller amounts as it starts to immediately crosslink in solution
I coat 2  12x15 sheets at a time with just 100ml size plus 0.8 gm glut, using a coating rod to spread. A hot rod with eliminate bubbles in the sizing
( rod is a RD90)
Don


On Apr 2, 2021, at 10:10 AM, Don Nelson <ac7zg@...> wrote:

You can use up to 0.9 ml 3% glut solution per 100ml of gelatin sizing (I use 5% gelatin)
More than that and you will start forming polyglut. Polyglut will give a yellow stain in the size and cannot be removed.
Very little glut can actually be used. Two active bonding sites on the glut molecule means a lot of crosslinking activity with gelatin
Don Nelson 


On Apr 2, 2021, at 8:22 AM, job.westerduin@... wrote:

Hi, i have experimented with gum printing (trail and error,, and i will to start serious first gum printing with a cyanotype as starting layer base this weekend or later.

I have a pot glutaraldehyde from Rollei Black Magic emulsion set, that was left over from my previous silver photopaper enlarging hobby
How many glut and gelatin per 1 liter water.

Greeting Job from The Netherlands. 


Re: What is a correct formula for gelatin+glutaraldehyde paper sizing

Job Westerduin
 

Hi thanks for answers,
I found a safety material sheet from Rollai-Maco from Germany. (Screenshot)

There is 2-5 pct of glut in there.
But the two another addidives might be give problems with sizing, this makes paper acid.



Op vr 2 apr. 2021 19:14 schreef Don Nelson <ac7zg@...>:

And you might want to mix smaller amounts as it starts to immediately crosslink in solution
I coat 2  12x15 sheets at a time with just 100ml size plus 0.8 gm glut, using a coating rod to spread. A hot rod with eliminate bubbles in the sizing
( rod is a RD90)
Don


On Apr 2, 2021, at 10:10 AM, Don Nelson <ac7zg@...> wrote:

You can use up to 0.9 ml 3% glut solution per 100ml of gelatin sizing (I use 5% gelatin)
More than that and you will start forming polyglut. Polyglut will give a yellow stain in the size and cannot be removed.
Very little glut can actually be used. Two active bonding sites on the glut molecule means a lot of crosslinking activity with gelatin
Don Nelson 


On Apr 2, 2021, at 8:22 AM, job.westerduin@... wrote:

Hi, i have experimented with gum printing (trail and error,, and i will to start serious first gum printing with a cyanotype as starting layer base this weekend or later.

I have a pot glutaraldehyde from Rollei Black Magic emulsion set, that was left over from my previous silver photopaper enlarging hobby
How many glut and gelatin per 1 liter water.

Greeting Job from The Netherlands. 


Re: What is a correct formula for gelatin+glutaraldehyde paper sizing

Don Nelson
 

And you might want to mix smaller amounts as it starts to immediately crosslink in solution
I coat 2  12x15 sheets at a time with just 100ml size plus 0.8 gm glut, using a coating rod to spread. A hot rod with eliminate bubbles in the sizing
( rod is a RD90)
Don


On Apr 2, 2021, at 10:10 AM, Don Nelson <ac7zg@...> wrote:

You can use up to 0.9 ml 3% glut solution per 100ml of gelatin sizing (I use 5% gelatin)
More than that and you will start forming polyglut. Polyglut will give a yellow stain in the size and cannot be removed.
Very little glut can actually be used. Two active bonding sites on the glut molecule means a lot of crosslinking activity with gelatin
Don Nelson 


On Apr 2, 2021, at 8:22 AM, job.westerduin@... wrote:

Hi, i have experimented with gum printing (trail and error,, and i will to start serious first gum printing with a cyanotype as starting layer base this weekend or later.

I have a pot glutaraldehyde from Rollei Black Magic emulsion set, that was left over from my previous silver photopaper enlarging hobby
How many glut and gelatin per 1 liter water.

Greeting Job from The Netherlands. 


Re: What is a correct formula for gelatin+glutaraldehyde paper sizing

Don Nelson
 

You can use up to 0.9 ml 3% glut solution per 100ml of gelatin sizing (I use 5% gelatin)
More than that and you will start forming polyglut. Polyglut will give a yellow stain in the size and cannot be removed.
Very little glut can actually be used. Two active bonding sites on the glut molecule means a lot of crosslinking activity with gelatin
Don Nelson 


On Apr 2, 2021, at 8:22 AM, job.westerduin@... wrote:

Hi, i have experimented with gum printing (trail and error,, and i will to start serious first gum printing with a cyanotype as starting layer base this weekend or later.

I have a pot glutaraldehyde from Rollei Black Magic emulsion set, that was left over from my previous silver photopaper enlarging hobby
How many glut and gelatin per 1 liter water.

Greeting Job from The Netherlands. 


Re: What is a correct formula for gelatin+glutaraldehyde paper sizing

Guido Ceuppens
 

Christina beat me to it but I also have used 3% gelatin as size mixed with 6 ml glutaraldehyde (2,5 % solution) per liter. Measure the amount of warm gelatin solution needed and mix the glut in just before you size the paper. You can also use a two step method, but make sure you have a good ventilation!


greetings from Belgium

Op vr 2 apr. 2021 om 18:48 schreef Christina Z. Anderson <christinazanderson@...>:

Job,
I use 6 ml 2.5% glutaraldehyde per liter of 3% gelatin. So you’d have to figure out what the percentage of Black Magic is and then do the math. It takes so little glut.
Chris

On Apr 2, 2021, at 9:22 AM, job.westerduin@... wrote:

Hi, i have experimented with gum printing (trail and error,, and i will to start serious first gum printing with a cyanotype as starting layer base this weekend or later.

I have a pot glutaraldehyde from Rollei Black Magic emulsion set, that was left over from my previous silver photopaper enlarging hobby.
How many glut and gelatin per 1 liter water.

Greeting Job from The Netherlands. 



--
Alternatieve fotografie


Re: What is a correct formula for gelatin+glutaraldehyde paper sizing

Christina Z. Anderson
 

Job,
I use 6 ml 2.5% glutaraldehyde per liter of 3% gelatin. So you’d have to figure out what the percentage of Black Magic is and then do the math. It takes so little glut.
Chris

On Apr 2, 2021, at 9:22 AM, job.westerduin@... wrote:

Hi, i have experimented with gum printing (trail and error,, and i will to start serious first gum printing with a cyanotype as starting layer base this weekend or later.

I have a pot glutaraldehyde from Rollei Black Magic emulsion set, that was left over from my previous silver photopaper enlarging hobby.
How many glut and gelatin per 1 liter water.

Greeting Job from The Netherlands. 


What is a correct formula for gelatin+glutaraldehyde paper sizing

Job Westerduin
 

Hi, i have experimented with gum printing (trail and error,, and i will to start serious first gum printing with a cyanotype as starting layer base this weekend or later.

I have a pot glutaraldehyde from Rollei Black Magic emulsion set, that was left over from my previous silver photopaper enlarging hobby.
How many glut and gelatin per 1 liter water.

Greeting Job from The Netherlands. 


Re: Coating gum

Jacques Kevers
 

...sorry: aluminum rod instead of plastic... (plastic is likely to work as well, I assume)

Jacques Kevers
Beau Site
Première Avenue 7
B-1330 Rixensart
Belgium
+32 2 653 56 02

61 - 80 of 6245