Re: [Leica] Mark Rabiner "rolling"

[Mark Rabiner <mrabiner@concentric.net>]

Philip Kokoczka wrote:
><Snip> 
> Mark, tell me more about the "rolling" your metal tank. How does this affect
> the negative? Do you need to change processing time because of the constant
> agitation?
> 
> Phil in MI
> 
Every other minute or agitation cycle I gently roll my metal tank back and forth
on my wetsink instead of inverting it for 10 seconds.
This is how tube developing works anyway it's just not continuous.
Metal tank users are against rolling agitation because the very outside loop of
your film on the reel will pickup more density and contrast as it moves faster.
But with a tall two liter tank inversion doesn't do much. So I alternate and do
it this was with my one liter tanks as well for consistency.
I think the two agitation methods balance each other out when used together.
Mark Rabiner