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LF Development Q: HP Combi-Plan

shutterkid

Jacksonville, US
220 posts

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shutterkid Registered since 17th Aug 2004
Sun 08-Jan-06 11:27 AM

Ok, for those doing LF and developing with HP's Combi-Plan...

You need to pour in 32 oz of developer/stop/fixer through a roughly 1/2" hole... so it's going to take a while while all the fluid gets in there. The combi-plan has a splash guard to ensure that the fluid touches the film from the bottom.

You're pouring developer in, and the bottom gets filled first, so the film gets more development time from the bottom up. When you are pouring out the developer, the effect cancels out (the tank is inverted so the developer empties from the bottom first), sort of...

If you have to develop your film, say, 12min @ 68F, how do you time it... do you start the clock after all the developer is in? As soon as you start pouring in? When do you start pouring out? Etc.

Is this the reason why some people use there combi-plans and dunk the film through the tanks? (...but @ $65/per PLASTIC tank...)

Thanks for your help!
Marcé

G