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    Nicholas Lindan's Avatar
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    As Ilford doesn't seem to be supplying any data ... a repost of some testing done at Darkrooom Automation:

    Tests at exposure times of 2, 64 and 256 seconds showing no noticeable change in density or contrast:
    Click image for larger version. 

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    Application note on intermittency and reciprocity:
    http://www.darkroomautomation.com/su...ermittency.pdf

    Anecdotal reports of reciprocity and intermittency effects are likely due to poor timing, failure to compensate for enlarger bulb warm-up/cool-down times and an inability to precisely measure and control exposure intensity.

    Application note on measuring and compensating the warm-up/cool-down time of an enlarger bulb:
    http://www.darkroomautomation.com/su...2LampDelay.pdf
    Last edited by Nicholas Lindan; 11-01-2011 at 06:33 PM. Click to view previous post history.
    DARKROOM AUTOMATION
    f-Stop Timers - Enlarging Meters
    http://www.darkroomautomation.com/da-main.htm

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