Texas Chrysotype Process: Alamo

Texas Chrysotype Process: Alamo

Alamo printed in gold. Full range of tones impossible with other chrysotype processes. For this, ammonium ferric oxalate is modified with ascorbate to produce a chrysotype with fine grain and a normal tonal range. No humidification required, the image prints out fully on dry paper.
Location
San Antonio
Equipment Used
Rittreck view fitted with 6.5
Exposure
10 minutes f/32
Film & Developer
HP5+ in Kodak tmax developer
Paper & Developer
Arches Platine, no development required.
Lens Filter
None
Intriguing building. On my screen, the image looks rather low contrast, is that really so and a limitation of the chrysotype process, or is it also partly a result of the reproduction as scan here?
 
Marco, Interesting, for on my screen the contrast is a bit high, with the area above and to the right of the door reaching zones 8 and 9. Original print has much stronger Dmax -- Ed Buffaloe commented (complained) about this to me. I have an Epson V700 scanner on the way and anticipate better scans than with my old HP G4050 scanner. Contrast in the Texas Chrysotype process can be varied quite a bit. You can reduce the volume of ascorbate added to AFO to lower it, size paper with gum arabic, or add a drop or two of platinum or palladium (or both). Boosting contrast is a matter of increasing the volume of ascorbate, substituting a drop of sodium ferric oxalate (not modified with ascorbate) for a drop of the AFO-C, or by simply using a wetter brush. I usually expose my negatives as for printing on silver gelatin, which seems just right for gold/AFO-C. For a chrysotype S process style print, prewet the paper and while it is just glistening brush on the Gold/AFO-C and you will get a grainy, contrasty red print.
 

Media information

Category
Technical Gallery
Added by
Richard Puckett
Date added
View count
506
Comment count
2
Rating
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Image metadata

Filename
richardpuckett7_alamoinsanantonio_104753.jpg
File size
339 KB
Date taken
Sat, 01 October 2011 11:31 AM
Dimensions
700px x 587px

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