29 September Meeting

A nice group attended my demonstration of Platinum over Vandyke. This process has a distinct advantage over using pure platinum to create the image in that there is a significant cost savings. Artcraft Chemicals offers Potassium Tetrachloroplatinate for about $40 per gram, which sounds like a lot. That said, that one gram can be used to create one liter of toner. For the purpose of my project I used 25ml of toner with an image size of about 6×8″, so toning each print cost about $1. As I move forward I will test the effect of using more toner as well as more dilute toner to see how this affects the print. During the toning process the platinum surrounds the silver, so the result is a platinum print.

I was asked to share the formulas that were used for the Vandyke process and Platinum toning. There are numerous options for these, but I have listed below the ones I used in the project on which I was working.

Vandyke formula (from The Book of Alternative Photographic Processes by Christopher James)

Part A

  • 100ml distilled water
  • 27g ferris ammonium citrate

Part B

  • 100ml distilled water
  • 4.5g tartaric acid

Part C

  • 100ml distilled water
  • 12g silver nitrate

Combine these three solutions and store in a dark glass bottle. Over time a precipitate will form, which can be removed by filtering through a coffee filter.

Platinum toner formula (from Sandy King via email)

  • 5g Citric acid
  • 5ml Potassium chloroplatinite 20% solution
    (OR 5ml sodium chloropalladite 20% solution)
  • 1000ml Water

This should be enough to begin experimentation on your own, and suiting the end result to that which properly reflects your intentions.

Click for larger image
Click for larger image
Click for larger image

Advertisements

1 June Meeting

June Presentation: Mordançage was created by Jean-Pierre Sudre during the 1960s. Elizabeth Opalenik created “veils” and I attended a workshop by her a few years ago. This process opens a potential Pandora’s Box of possibilities that allow one to move their images into a completely new direction.

On Thursday I will offer a short talk on the process and give a demonstration of Mordançaging a print and showing some of the toning capabilities. This is a meeting you will not want to miss.


From the meeting here are a couple of example images from the demonstration:

The Thiourea formula I use:

Part A
5gr Thiourea in 250ml H2O
Part B
20g Sodium Carbonate in 1lit H2O
Working solution
20ml Part A to Part B

To simplify things I make up 125ml of Part A and store it. When I am ready to use I make 250ml of Part B and then add 5ml Part A to Part B.

4 May Meeting

May Presentation: Gum Printing Explorations – Part I:The Journey Begins presented by Barry Schmetter. We’ll begin a multipart exploration of gum printing. The series will start at the basics and move on to experimentation, multi-layer and gumover printing. Feel free to bring a negative of any size to the meeting.

2 February Meeting

UnnamedOur next meeting is TODAY at 7:30 pm at Artists and Makers in Rockville. This week’s meeting will be a chance to share work, new projects, and talk photography.

In the past few months, I’ve started collaborations with some other (non-photographic) artists, with the intent of working on the photographic side of things. Would like to solicit the group for ideas and opinions as a jumping off point for a discussion on photographic collaborations.

As is our usual habit, members will adjourn at 9-ish to a nearby pub. Our new watering hole is the patio area at Matchbox in Rockville.

1 December Meeting

The program for December will include, among other things, a demonstration on inking a Bromoil print. For those not familiar with the look of a Bromoil print, examples can be seen at GeorgeSmyth.com and on Flickr. This process was favored by the Pictorialists of the early 20th century to give their images a unique look.

An explanation of the process will start the session, then a prepared matrix will be turned into a Bromoil print.

1 September Meeting

Greetings, members the of PhotoGathering. Our next meeting is at 7:30 pm at Artists and Makers in Rockville. This week’s meeting will be a chance to share work, new projects, and talk photography.

As is our usual habit, members will adjourn at 9-ish to a nearby pub. Our new watering hole is the patio area at Matchbox in Rockville.