Shanghai and Lucky Film

[numnutz]

Hi - I have been given (unopened) 50 sheets of this stuff along with a few opened boxes of other film. Has anyone got any details of its reciprocity curve? - It may possibly be on a leaflet in the box but its in the freezer....

Also I have noticed boxes of "Lucky" 10 x 8 film on the auction site at quite a keen price. As I wish to use these films mainly for practice has anyone any experience good or bad with them.

Thanks in advance

nn

<edit> The reason I asked this question is I wish to do some experimentation and you all will know this is expensive using the mainstream Kodak / Ilford 10 x 8 film. Doing some more research I found that Foma 100s reciprocity curves are somewhat extreme. I picked the "Lucky" film as it appeared cheap on the auction site but I found that Foma and Adox films 25, 50, and 100 ISO films are cheaper when you include postage. Adox (100) has a better Reciprocity curve so I will be trying a box of 50 sheets of that.
The rates of failure are:
FOMAPAN 100 Classic
Exposure (seconds) 1/1000–1/2 1 10 100
Lengthening of exposure 1x 2x 8x 16x
Correction of aperture number 0 -1 -3 -4

ADOX CHS 100
1/2 Sec. no change necessary
1 Sec. plus 1/6 stop (1,2x)
10 Sec. plus 1/3rd of a stop or exposure times (1.3x)
100 Sec plus 2/3rds of a stop or exposure times (1.5x)

</edit>

[IanG]

Don't believe any manufacturers Reciprocity curves, do your own tests.

I found Fomapan 100 & 200 no worse than other films when I did practical tests last year. Ilford only give a guide lines as there are far to many variables.

Ian

[lostlandsuk]

You should definitely go and test it for yourself.
With regard to cheaper brands of film . . . well, I've had my experiences, fortunately none on unrepeatable images.
Worst of the lot has been Fomapan 100 (strangely the roll film is fine - but whether I've just been unlucky with the sheet film, I don't know - I've had massive pinholes in the emulsion, to the extent that it looks like I've captured UFO activity . . .honest! ).
My favourite cheaper film is Adox CHS 100, whilst not the sharpest knife in the drawer, it does have a nice look to it and is fairly reasonable; it is however very soft when wet and is prone to handling marks so you have to be extra careful, also you really need to keep all your chemical temperatures as consistent as possible, this includes the washing water as I've experienced slight 'frilling' of the emulsion along the long edges..
I've not tried Lucky - after the Foma experience I've been wary of anything that appears to be a bargain
Phil

[numnutz]

Thanks for your comments - I went to Silverprint this morning and purchased 50 sheets of 10 x 8 Adox 100 ISO, Hopefully I will be able to go out and about to expose these to test out the film and my exposure.

nn

PS I have never had any trouble with Foma film in the 5 x 4 size...

[Marizu]

Worst of the lot has been Fomapan 100 (strangely the roll film is fine - but whether I've just been unlucky with the sheet film, I don't know - I've had massive pinholes in the emulsion, to the extent that it looks like I've captured UFO activity . . .honest! ).

That sounds nasty. I've had good experiences with it over the last couple of years. I've exposed several boxes of 5x4 and I'm into a box of 10x8 without incident.
Enjoy the Adox!