On Apr 30, 4:04 pm, Peter <w2...@[EMAIL PROTECTED]
> wrote:
> On Apr 30, 4:43 am, Steven Woody <narkewo...@[EMAIL PROTECTED]
> wrote:
>
> > How many volumn of solution do I need at least to smoothly process
> > print paper in a 12x16 tray? I am afraid my 2 liter bottle is not
> > enough to do this. Thanks.
>
> > -
> > woody
>
> How much you really need is somewhat dependent on the tray and your
> technique. I have a very smooth and flat 8x10 tray and can actually
> do fine with 100 ml., although I often use a bit more.
only 2mm deep, amazing!
> Your tray is
> about 2.5 times the area. If it is smooth and flat and you are not
> much more clumsy than me, you should be able to do it with 300 ml.
> Even so, 500 ml should be generous. If your tray has, for example,
> deep grooves as some of my larger trays do, you will need a bit more.
>
> Why not take a sheet of plain white paper the size you will use and
> try a test? Put your best estimate of the amount you will need of
> water in the tray and try to keep the paper wet (in daylight so you
> can see what is going on). What you need to do is keep the paper wet
> and the upper side fully in contact with fresh developer by agitation.
>
> 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.
>
> A problem that occurs when trying to use the minimum developer is
> initially wetting the paper evenly. There is a bit of surface tension
> in liquids and some curling in older paper. Consequently, I deal with
> this (usually) by tipping the tray and putting an edge of the paper
> first in the deep end while lowering the tray so the developer flows
> over the paper. Sometimes (particularly if there is a lot of curl) I
> simply put it in emulsion side down for a few seconds and then turn it
> over with a few seconds of continuous agitation. Either can work.
Thanks a lot with your information. Now I come with confidence ready
to buy and use some 12x16 papers.
-
woody
|
