Steve Gullick wrote:
Hi Larry,
Yes, temperature is critical, but it really is not difficult to do
this,
jusfill a sink with water of the correct temperature and use it to
float
your chemicals in. This will keep them at the correct temp. also, keep
the
dev. tank in it between inversions. If Bob wanted to, he could use shop
bought bottled water for mixing and use his household supply for temp.
bath!
Steve
- ----- Original Message -----
From: "Larry" <halpert@xxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: 01 May 2001 00:41
Subject: Re: [OM] Processing those OM_Shot Slides
> Isn't there only a 1/2,or 1 degree temperature variance neccessary?
>
> Larry
=====================================================================
Actually, temperature is not critical but timing is. You need to time
the process accurately according to the average temperature. Keeping
the chemicals floating in a sink of warm water, as Steve suggests, is a
good idea but you can still get some cooling taking place, especially
in cold weather. It's advisable, therefore, to measure the temperature
again, approximately halfway through the process, to get a better
estimate of the average temperature of the chemicals over the whole
process. Then adjust your timing accordingly.
Hypothetical example:
Temperature at start of process = 30 celsius
Time required for 30 celsius = 12 minutes
Temperature measured after 6 minutes = 28 celsius
Therefore, 28 celsius is a reasonable estimate of the average
temperature and the process time should be based on this.
Time required for 28 celsius = 14 minutes
Process for a further 8 minutes (to give 14 mins total time)
Regards,
=====
Ray
"The trouble with resisting temptation is
you never know when you'll get another chance!"
__________________________________________________
Do You Yahoo!?
Yahoo! Auctions - buy the things you want at great prices
http://auctions.yahoo.com/
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|