D76 1:1 - how to stock it?

Do You dilute it 1:1 and then keep it as such? In the fridge or it doesn't
matter? Do You do the stock solution and then further dilute it with water
just prior to developing. Does it matter at all? What is it's lifespan in
either case?

thanks in advance

Dabar




Dabar

Dabar <(E-Mail Removed)> wrote:
> Do You dilute it 1:1 and then keep it as such? In the fridge or it doesn't
> matter? Do You do the stock solution and then further dilute it with water
> just prior to developing. Does it matter at all? What is it's lifespan in
> either case?

You keep the stock solution (3.8l from a 3.8l-package) in brown, airtight
bottles and dilute immediately before usage.

Stock solution keeps at 6 month in a tight bottle, diluted working solution
keeps a few hours.

Martin

On Tue, 15 Jul 2003 16:43:21 +0200, "Dabar" <(E-Mail Removed)> wrote:

>What is it's lifespan in
>either case?

If you store the solution in brown glass or PET bottles that are full to
the top, the only oxidation will be from the O2 in the water. Degradation will
be very, very slow and I'd give it at least a year on the shelf. Possibly 3.
Some may consider this outrageous but I have mixed Microphen (a PQ formula
similar to D-76) and used it over the last 3 years without seeing any
degradation in the developer.

Regards,

John - http://www.darkroompro.com
Anyone that says
"The best things in life are free"
never had children !

Mix the stock solution and store it in a series of closed bottles. For 1
gallon I use two quarts three pints and two half-pints. I use glass
marbles to "top off" the bottles. As the smaller bottles are emptied I
refill them from the larger bottles.

--
73 es cul

wb3fup
a Salty Bear

"Sandorm Mathe" <(E-Mail Removed)> wrote in message
news:bigsqj$orr$(E-Mail Removed)...
> Dabar <(E-Mail Removed)> wrote:
> > Do You dilute it 1:1 and then keep it as such? In the fridge or it
doesn't
> > matter? Do You do the stock solution and then further dilute it with
water
> > just prior to developing. Does it matter at all? What is it's lifespan
in
> > either case?
> > thanks in advance
> > Dabar
>
> Two reasons for mixing just before use:
> 1. The stock solution keeps better, the mixing water contains O2 (unless
> you boil it) so more water will oxidise more.
>
> 2. Who keeps the stock at the right temp? In winter mine is at 16 deg. C
> sitting on the basement floor, in summer its 23 deg. C
> By mixing with the appropriate temp. water (24 in winter, 17 in
summer),
> the 1+1 solution comes out at exactly 20 deg C which is what I always
use.
>
>
> --
> Sandor Mathe
> (E-Mail Removed)

Sandorm Mathe <(E-Mail Removed)> wrote in message news:<bigsqj$orr$(E-Mail Removed)>...
> Dabar <(E-Mail Removed)> wrote:
> > Do You dilute it 1:1 and then keep it as such? In the fridge or it doesn't
> > matter? Do You do the stock solution and then further dilute it with water
> > just prior to developing. Does it matter at all? What is it's lifespan in
> > either case?
> > thanks in advance
> > Dabar
>
> Two reasons for mixing just before use:
> 1. The stock solution keeps better, the mixing water contains O2 (unless
> you boil it) so more water will oxidise more.

It's best to wait a day or two after mixing, to be sure all powder has
dissolved. Otherwise, you risk dust-like spots on the film.

>
> 2. Who keeps the stock at the right temp? In winter mine is at 16 deg. C
> sitting on the basement floor, in summer its 23 deg. C
> By mixing with the appropriate temp. water (24 in winter, 17 in summer),
> the 1+1 solution comes out at exactly 20 deg C which is what I always use.

Besides storing in small dark colored containers (reduces chances of
oxidizing) you may want to consider using distilled water when mixing stock
solution. Keeps about 3 months stored properly. Oxidation and light are the
bad guys!

"Sandorm Mathe" <(E-Mail Removed)> wrote in message
news:bigsqj$orr$(E-Mail Removed)...
> Dabar <(E-Mail Removed)> wrote:
> > Do You dilute it 1:1 and then keep it as such? In the fridge or it
doesn't
> > matter? Do You do the stock solution and then further dilute it with
water
> > just prior to developing. Does it matter at all? What is it's lifespan
in
> > either case?
> > thanks in advance
> > Dabar
>
> Two reasons for mixing just before use:
> 1. The stock solution keeps better, the mixing water contains O2 (unless
> you boil it) so more water will oxidise more.
>
> 2. Who keeps the stock at the right temp? In winter mine is at 16 deg. C
> sitting on the basement floor, in summer its 23 deg. C
> By mixing with the appropriate temp. water (24 in winter, 17 in
summer),
> the 1+1 solution comes out at exactly 20 deg C which is what I always
use.
>
>
> --
> Sandor Mathe
> (E-Mail Removed)

At a hobby or craft store. Take your bottles, at least one of each size.
The ones I use are made for frying, and then making jewelry and are clear
glass.

--
73 es cul

wb3fup
a Salty Bear

"belfast biker" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> On Wed, 27 Aug 2003 03:41:55 -0400, "WB3FUP \(Mike Hall\)"
> <(E-Mail Removed)> wrote:
>
> >Mix the stock solution and store it in a series of closed bottles. For
1
> >gallon I use two quarts three pints and two half-pints. I use glass
> >marbles to "top off" the bottles. As the smaller bottles are emptied I
> >refill them from the larger bottles.
>
>
> Where does one buy marbles?
>
> --
> ------- o
> ----- <#\,
> --- ()/()
> Belfast Biker
> "When Religion And Politics Ride In The Same Cart.....The Whirlwind
Follows"

On Wed, 27 Aug 2003 15:11:02 -0400, "WB3FUP \(Mike Hall\)"
<(E-Mail Removed)> wrote:

>At a hobby or craft store. Take your bottles, at least one of each size.
>The ones I use are made for frying, and then making jewelry and are clear
>glass.


Cheers for the advice. Frying?
--
------- o
----- <#\,
--- ()/()
Belfast Biker
"When Religion And Politics Ride In The Same Cart.....The Whirlwind Follows"

"WB3FUP \(Mike Hall\)" <(E-Mail Removed)> writes:

> Mix the stock solution and store it in a series of closed bottles.
> For 1 gallon I use two quarts three pints and two half-pints. I use
> glass marbles to "top off" the bottles. As the smaller bottles are
> emptied I refill them from the larger bottles.

I use the 500ml PET bottles used for bottled water. Remove air, then
into the freezer. Nuke prior to use and adjust temp. Note that some
stock solutions should not be frozen as some components will separate
out, and also they can take a few days to fully freeze due to FP
depresion by the chemical content. Remember to label and date them!

--
Paul Repacholi 1 Crescent Rd.,
+61 (08) 9257-1001 Kalamunda.
West Australia 6076
comp.os.vms,- The Older, Grumpier Slashdot
Raw, Cooked or Well-done, it's all half baked.
EPIC, The Architecture of the future, always has been, always will be.

Has anybody tried using the "vacuvin" seals that are commonly available from
supermarkets etc?

These are basically rubber bungs that come with a little vacuum pump for
removng the air from partly empty bottles of wine.
I bought some a while back for their intended purpose but they don't get
used much (because I don't get many partly empty bottles of wine ;?)

BW

"Robert J. Mathes" <(E-Mail Removed)> wrote in message
news:3f4c058c_3@newsfeed...
> Besides storing in small dark colored containers (reduces chances of
> oxidizing) you may want to consider using distilled water when mixing
stock
> solution. Keeps about 3 months stored properly. Oxidation and light are
the
> bad guys!
>
> "Sandorm Mathe" <(E-Mail Removed)> wrote in message
> news:bigsqj$orr$(E-Mail Removed)...
> > Dabar <(E-Mail Removed)> wrote:
> > > Do You dilute it 1:1 and then keep it as such? In the fridge or it
> doesn't
> > > matter? Do You do the stock solution and then further dilute it with
> water
> > > just prior to developing. Does it matter at all? What is it's lifespan
> in
> > > either case?
> > > thanks in advance
> > > Dabar
> >
> > Two reasons for mixing just before use:
> > 1. The stock solution keeps better, the mixing water contains O2 (unless
> > you boil it) so more water will oxidise more.
> >
> > 2. Who keeps the stock at the right temp? In winter mine is at 16 deg.
C
> > sitting on the basement floor, in summer its 23 deg. C
> > By mixing with the appropriate temp. water (24 in winter, 17 in
> summer),
> > the 1+1 solution comes out at exactly 20 deg C which is what I always
> use.
> >
> >
> > --
> > Sandor Mathe
> > (E-Mail Removed)
>
>