[pure-silver] Re: Blue Water
- From: Sauerwald Mark <mark_sauerwald@xxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Tue, 19 Sep 2006 12:38:45 -0700 (PDT)
Adrienne
With 120 film, and sheet film, there is an extra
coating - called an 'Antihalation layer' The purpose
(as I understand it) is that the light passes through
the emulsion, through the film base and then might
reflect off of the backing and cause a ghost image
from the back of the emulsion.
It is water soluable, so if you do a pre-rinse of your
film prior to developer, the rinse comes out a bluish
colour, if not, then the developer comes out blue.
I don't know why 35mm doesn't seem to have this, but I
am sure that we will be getting many replies.
BTW, I shoot mostly 4x5 with some 35mm mixed in, and
recently got a MF camera to play with too - I have
been spoiled by the LF and get frustrated with the
tiny 35mm negs in the darkroom, but still wanted
something that I could handhold and that would give me
a bit of DOF to work with.
--- Adrienne Moumin <photowonder2010@xxxxxxxxxxx>
wrote:
> I'm finally moving up to 120 from 35mm, and am
> noticing the strangest thing
> in processing the film.
>
> When I dump out the pre-wet water, it is the color
> of wash aid--the bigger
> tank/more rolls, the darker the water. The film
> comes out fine. (and yes I
> am certain I am using water and not wash aid by
> accident!)
>
> This has happened w/both Tri-X and HP5+.
>
> Has anyone else noticed this, or am I living on
> Planet X?
>
> Thanks and regards,
> Adrienne Moumin
>
> ***************************************
> on the web at: www.picturexhibit.com
> Saatchi Gallery: http://tinyurl.com/hw6r3
> Tiny Fine Art: http://tinyurl.com/o2ldp
> ***************************************
>
>
>
=============================================================================================================
> To unsubscribe from this list, go to
> www.freelists.org and logon to your account (the
> same e-mail address and password you set-up when you
> subscribed,) and unsubscribe from there.
>
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com
=============================================================================================================
To unsubscribe from this list, go to www.freelists.org and logon to your
account (the same e-mail address and password you set-up when you subscribed,)
and unsubscribe from there.
Other related posts:
