Lomography-400 emulsion side up

removedacct2 · May 31, 2021

in a previous thread I posted some results of shooting Lomography Redscale XR 50-200 at iso 100, after re-rolling up on the other side of the emulsion:
https://www.photrio.com/forum/threads/color-film-lomography-elacsder-redscale.184389/

brbo noted Lomography Redscale could be Lomography-400, so I took a roll of this one, re-rolled with emulsion side up, and shot at iso 100. Few samples, blue sunny sky, lot of light:

brbo · Jun 1, 2021

That certainly proves me wrong.

laingsoft · Jun 4, 2021

Interesting that the images are so green.

Donald Qualls · Jun 4, 2021

Looks like the same sort of "not quite there" (but with a different flaw) as their Purple -- and they redscaled it to make it more useful/interesting.

Lachlan Young · Jun 4, 2021

Donald Qualls said:
Looks like the same sort of "not quite there" (but with a different flaw) as their Purple -- and they redscaled it to make it more useful/interesting.

I think it's reasonable to surmise that the yellow filter layer is likely what's misbehaving here.

Donald Qualls · Jun 4, 2021

I"m pretty sure it either doesn't exist or is very weak in the Purple film -- here, perhaps it's weak, or there something else going on with the relative sensitivity of the magenta- and cyan-forming layers (sensitive to green and red light).

Lachlan Young · Jun 4, 2021

Donald Qualls said:
I"m pretty sure it either doesn't exist or is very weak in the Purple film -- here, perhaps it's weak, or there something else going on with the relative sensitivity of the magenta- and cyan-forming layers (sensitive to green and red light).

Yes - thinking about it, I'm not convinced it's the filter (did Agfa ever change over from a CLS based filter to a dye-based one like Portra etc?), but a coupler/ emulsion layer speed interaction - or the amount of dye formed by a particular coupler (is it lacking some of the components that are added to limit dye formation/ enhance sharpness - and/ or DIAR couplers etc?). The Lomo films provide quite an interesting demonstration of the steps that have to be gone through to get a usable 'normal' looking colour neg film.

Andrew O'Neill · Jun 4, 2021

The photo of the church is really cool!

laingsoft · Jun 4, 2021

Lachlan Young said:
Yes - thinking about it, I'm not convinced it's the filter (did Agfa ever change over from a CLS based filter to a dye-based one like Portra etc?), but a coupler/ emulsion layer speed interaction - or the amount of dye formed by a particular coupler (is it lacking some of the components that are added to limit dye formation/ enhance sharpness - and/ or DIAR couplers etc?). The Lomo films provide quite an interesting demonstration of the steps that have to be gone through to get a usable 'normal' looking colour neg film.

I don't know about Agfa's history, but silver nanoparticles (CLS) are much much easier to synthesize compared to a complicated dye. PE mentioned some difficulties arising from dyes migrating into other layers, and he mentioned that a lot of the difficulty in making color films comes from interlayer scavengers to stop that migration. Perhaps the cyan dye is migrating upwards and forming an odd brown/green dye cloud?

Lachlan Young · Jun 4, 2021

laingsoft said:
I don't know about Agfa's history, but silver nanoparticles (CLS) are much much easier to synthesize compared to a complicated dye. PE mentioned some difficulties arising from dyes migrating into other layers, and he mentioned that a lot of the difficulty in making color films comes from interlayer scavengers to stop that migration. Perhaps the cyan dye is migrating upwards and forming an odd brown/green dye cloud?

The one that looks like it's missing the interlayer scavengers is Lomochrome Metropolis.

removedacct2 · Jun 7, 2021

Andrew O'Neill said:
The photo of the church is really cool!

well, I think it is indeed usuable in some context or just for the fun. i did shoot only one 120 roll of the Redscale XR and was very perplex about how the hell make it usable , but this Lomography-400 re-rolled with emulsion on the verso may be more interesting....

removedacct2 · Jun 7, 2021

I keep playing....
this time i loaded another roll of this Yhpargomol-400 in a Bronica S2 and took four pictures, each at 50 then 100 then 250 (or was it 200...) iso. This of course inspired by the fact Redscale XR is said to give very different grain and colour shifts depending the exposure used (from very red at 200 to yellowish at 50). So how does Yhpargomol-400 behaves?

I have a new hobby now, film waster, the guy who stoohs mlif noislume pu.... agent Cooper in Twin Peaks red room dream scene with reverse speech

from left to right 50-100-200/250:

Lomography-400 emulsion side up

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