The images on flickr are a simple digital photo of the negative on the
light box. The scans I refer to are done on my Epson V500 flatbed. 12
negatives at a a time (2 strips of 6). All controls set on neutral.
During the Covid shutdowns I took the opportunity to do a "digital
contact sheet" of my films, or in this case films which came to me from
a relative. While I don't have much C-41 work, the frames are
noticeably different. Eyeballing the negatives themselves they are
clearly different from other C-41 films I have to compare against. It
puzzled me as I there are images shot under a wide range of conditions
where some frames are yellowed but others shot apparently shortly
after/before look normal, and the effect is always across the whole
frame. Other films from the same relative show some much slighter
yellowing which is consistent with dye degradation from storage under
room conditions.
Thank you for all the help.
Richard Urmonas
On 10/29/21 1:28 PM, ej@xxxxxxxxxxxxxxxxxxxxxxxxxx wrote:
OK, here’s my take on it… Youre color correcting the wrong image first! Forest pic probably has open shade,… lots of green and blue… while the shot from the car is “normal” daylight. If you balance your scan setting and lock them down, you’re probably going to think darn that foliage shot looks too cool.
And since this is film, unlike a digital asset, it does include any of the usual crutches for adjusting for changing light values, you’ll be best advised to lock in the best guess for normal for that FILM base, the coding on the film edges and move forward. I’d make an action in PS and include a curve and a levels adjustment and move on.
Exposure looks well within normal, and there you go.
What are you using for the scanning process?
Eric
*From:*pure-silver-bounce@xxxxxxxxxxxxx <pure-silver-bounce@xxxxxxxxxxxxx> *On Behalf Of *Richard Urmonas
*Sent:* Thursday, October 28, 2021 9:15 AM
*To:* pure-silver@xxxxxxxxxxxxx
*Subject:* [pure-silver] Re: Yellow colouration in C-41 negatives
Hello Bob,
The issue is the overall "purple" colouration of the neagtive, when this is inverted to a positive there is a strong yellow colouration, like a yellow filter was used. Note the frame on the left does not show this colouration and it inverts to a normal looking print. Comparing to C-41 images I have taken they look more brownish to my eye, and so are similar to the left most frame.
Richard Urmonas
On 10/28/21 5:43 AM, BOB KISS (bobkiss) wrote:
OK, FOLKS,
All I see is the standard color mask (mentioned in previous post)
that all color negs have to allow printing without excessive
filter packs. I see NOTHING out of the ordinary. Am I missing
something???
CHEERS!
BOB
*From:*pure-silver-bounce@xxxxxxxxxxxxx
<mailto:pure-silver-bounce@xxxxxxxxxxxxx>
[mailto:pure-silver-bounce@xxxxxxxxxxxxx
<mailto:pure-silver-bounce@xxxxxxxxxxxxx>] *On Behalf Of *Richard
Urmonas
*Sent:* Thursday, October 28, 2021 7:32 AM
*To:* pure-silver@xxxxxxxxxxxxx <mailto:pure-silver@xxxxxxxxxxxxx>
*Subject:* [pure-silver] Re: Yellow colouration in C-41 negatives
Took a quick picture of part of a strip on the light box
https://flic.kr/p/2mENZE1 ;<https://flic.kr/p/2mENZE1>
The left most image has normal colour, the middle one has a strong
yellow effect, and the right one the effect is present, but much
less severe.
Hope this helps shed some light on the issue.
Richard Urmonas
On 10/27/21 7:09 AM, Dana Myers wrote:
On 10/27/2021 7:05 AM, Speedy _ wrote:
Why don't you put one or more of these negative strips on
a light box and photograph it. You could then make those
images available so we can see and evaluate them. If you
don't have a light box open MS Word or Wordpad or whatever
you have. Use the white screen of your computer's monitor
for a white box. If we can see what you are describing we
might be able to come up with some good ideas...
Chuck
This would be extremely useful!
Dana
