Ed Bray
Redundant Pressure Filters (Tottiford Water Treatment Works)
This is an image of eight of the 16 redundant Horizontal Pressure Filters at the lower site of Tottiford Water Treatment Works in South Devon. The Horizontal Pressure Filters have been in daily use from 1936 until April 2012, the building and filters are now redundant due to some new rapid-gravity filters having been built on the Upper Site.
The image was taken on a Canham MQC 5x7 with a 72mm Super Angulon XL lens at f45 with a four minute exposure on Adox 25 film. The 4 minute exposure was due to the small aperture used, the Centre Filter for the &2mm XL (2 stops) and I allowed an additional stop from 2 minutes to 4 for reciprocity failure.
The film was processed in a 3006 Expert drum on a Jobo CPP2 using 500mls of Divided Pyrocat HD for 6 minutes for both Solution A & B at 24° Centigrade before being fixed with TF-3 Alkaline Fixer before being washed and dried.
I used the Pyrocat divided as I wanted to try to get some detail in the large semi-circle windows. I was pleasantly surprised by how much detail was brought out from the windows using this method.
The film was Wet Scanned at 2400 dpi on an Epson V750 Pro Scanner using the 'Better Scanning' film holder with Kami fluid and using Silverfast Ai Studio V8. I carried out some local exposure control, spotted, sharpened and toned the imnage using a combination of Adobe Photoshop CS6 and Nik Silver Efex Pro II.
Redundant Pressure Filters (Tottiford Water Treatment Works)
This is an image of eight of the 16 redundant Horizontal Pressure Filters at the lower site of Tottiford Water Treatment Works in South Devon. The Horizontal Pressure Filters have been in daily use from 1936 until April 2012, the building and filters are now redundant due to some new rapid-gravity filters having been built on the Upper Site.
The image was taken on a Canham MQC 5x7 with a 72mm Super Angulon XL lens at f45 with a four minute exposure on Adox 25 film. The 4 minute exposure was due to the small aperture used, the Centre Filter for the &2mm XL (2 stops) and I allowed an additional stop from 2 minutes to 4 for reciprocity failure.
The film was processed in a 3006 Expert drum on a Jobo CPP2 using 500mls of Divided Pyrocat HD for 6 minutes for both Solution A & B at 24° Centigrade before being fixed with TF-3 Alkaline Fixer before being washed and dried.
I used the Pyrocat divided as I wanted to try to get some detail in the large semi-circle windows. I was pleasantly surprised by how much detail was brought out from the windows using this method.
The film was Wet Scanned at 2400 dpi on an Epson V750 Pro Scanner using the 'Better Scanning' film holder with Kami fluid and using Silverfast Ai Studio V8. I carried out some local exposure control, spotted, sharpened and toned the imnage using a combination of Adobe Photoshop CS6 and Nik Silver Efex Pro II.