"Steven Woody" <narkewoody@[EMAIL PROTECTED]
> wrote in message
news:268a578f-fa92-4ac1-b67d-55eb181cefc9@[EMAIL PROTECTED]
> On Apr 30, 10:54 pm, t...@[EMAIL PROTECTED]
(Thor Lancelot Simon) wrote:
>> In article
>> <3af4c15b-53eb-4aaa-b2d3-a0fe88e2a...@[EMAIL PROTECTED]
>,
>>
>> Peter <w2...@[EMAIL PROTECTED]
> wrote:
>>
>> >Generally speaking the runway behind you is of no practical use in an
>> >airplane and the liquid (more than a few molecules) above the paper is
>> >not of much use, either. Still, you have to keep it evenly wet and
>> >circulating (normally with intermittent agitation) for even
>> >development.
>>
>> Are you using your developer one-shot, or reusing it? With such small
>> solution volumes you run the risk of changes to the paper's
>> characteristic
>> curve because the developer itself can become exhausted over the course
>> of developing a single sheet of paper, giving different contrast in
>> shadows,
>> midtones, and highlights.
>>
>
> oh.. i thnk i lost the answer. i think i should ask this way:
> what's the usual height of solution required for smoothly develop
> 16x20 papers in tray? i hope this way you experts can understand me
> better.
>
>
There are two answers:
1. You have to use enough chemistry to make the chemical reaction work.
With
most developers, this isn't an issue, but with very small quantity of
developer it is possible to exhaust the chemical after a lot of prints.
The
manufacturer's specifications will tell you how many prints can be made
with
a certain amount of chemical.
2. You have to use enough chemical to quickly wet the paper. If you use a
very small amount, it will be difficult to get the developer to flow over
the entire surface evenly.
My trays have very tiny ridges on the bottom. I like to have at keast
about
1/2" of developer in the tray. (I use developer one-shot and throw it away
after a session). I like to have the stop bath and fixer trays nearly half
full. I re-use those chemicals.
>
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