Archived posting to the Leica Users Group, 1999/02/17
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I think I can feel my leg being gently pulled. I can see two possible advantages to the process. One is that the Tri-X grain size and structure may be preferable to the 3200 films. The second is (sacrilege) I can't get hold of 3200 film in medium format and one day I might be tempted to drag my Mamiya out to a jazz cellar. Cheers Gareth Jolly >>> Marc James Small <msmall@roanoke.infi.net> 18/February/1999 08:18am >>> At 08:47 AM 1999-02-18 +1000, Gareth Jolly wrote: >There is a procedure described in 'The Darkroom Cookbook' for pushing >Tri-X to 3200, while retaining shadow detail. From memory, it involves >transferring the film to a new long tank containing a warmed hydrogen >peroxide bath for a period. An empty spool or two at the bottom of the >long tank keeps the film suspended above the bath, in the fumes of the >hydrogen peroxide. I would suspect this to be a rather simplified manner of "hypering" the film, normally done with nitrogen "forming gas". This is a common practice with amateur astronomers and hypered film or, for that matter, hypering tanks, are readily available from the vendors who advertise in SKY & TELESCOPE. But, to that end, freezing your camera down with dry ice will REALLY lead to gains in low-light sensitivity and will impede fogging, to boot! Now, a Noctilux, a glass of Lagavulin, five pounds of dry ice, a bunch of Ted's underwear, and, gads folks, we're talking TOTAL darkness pictures here! Marc msmall@roanoke.infi.net FAX: +540/343-7315 Cha robh bas fir gun ghras fir!