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The third technique we learnt on the workshop was Bayard's direct positive process. A sheet of paper was sensitised with silver chloride, exposed until it was dark, and then soaked in potassium iodide. When re-exposed to the light, whilst still wet, the dark areas bleach out.
This image shows it towards the end of the second exposure.
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For the week 25-29 June I attended the workshop titled "1839: Daguerreotype, Photogenic Drawing & Bayard’s Process" at Lacock Abbey and the Fox Talbot Museum - see www.talbotworkshops.co.uk/1839.htm
Toho 11/o and Nymo thread.
I think about clasp - may be I do a toggle clasp with a loop, or I add just a button..
A Mexican wolf lays on a table while staff performs health checks, takes measurements and administers vaccines.
Credit: Mexican Wolf Interagency Field Team
I know, heavily processed. I used some speedlights to help get lighting to the rear flowers with a white behind. It will spilt opinion but I reckon if you're going to process, process quite heavily. Much more to do with getting an arty effect than anything. Colours white and pink work.
Early in the render process. Probably too much red. After a few hundred frames, I think the red is going to overwhelm. Whatev. I will let it ride.
Read about it here.
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Reworking of this image.
Artists and passersby at the free art festival, Southsea.
Aged with colour tones and HSV, masked multiply layer over the top to bring back the clouds, vignette to finish.
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Unfortunatley the 24 hr delay after iodisation was a mistake with this paper, see the scan with transmitted light, serious fogging could be seen emerging after exposure
15 min exposure bright day blue sky f/6,3 whole plate
Winther's tannin process with Sumac extract
Pre-silver brushed 5,2% AgNO3, dried iodised in 4% KJ for 10 min followed by 2 water baths of 10 min each (pure water) blotted off and dried
Sensitized just before exposure with sumac extract 28 drops, AgNO3 14% 7 drops, gl. acetic acid 2 drops made double.Exposed moist in a glass sandwich.
Developer brushed and sprayed with 25% alcohol for 1 hr 10 min
Developer consists also of sumac extract 28 drops, AgNO3 14% 7 drops, gl. acetic acid 2 drops made double. After brushing sprayed and left wet face up under cover, brushed also just with Sumac extract saving the silver nitrate for later to boost density.
Short wash before 2 x 10 min hypo and 1 hr running water bath
Canson Marker paper was pre-silvered and iodized the day before exposure and processing.
The paper behaved well when prepared pre-silvering and iodisation on the same day as exposure and processing.
" I will be back..."
Dept. of Chemical Engineering & Applied Chemistry - Mahadevan Lab, Faculty of Applied Science & Engineering, University of Toronto
Photo by Sara Collaton
Original Collection: Experiment Station Publications Photographic Collection (P 132)
Item Number: P132:129
Image Description: Processing blue lake beans at Blue Lake Packers in Corvallis.
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