Re: maco film problems

[Cor Breukel <cor@xxxxxxx>]

Hai Jaap,

I have shot two rolls of the 35mm 820 film, with no problems. But I
remeber that there were other people who had problems. It seems that
MACO admitted to have made some mistake, if I recall correctly.

Re. prewash: I tried without and with pre wash: no difference as far as
I can see

Cor

Jaap Los wrote:
> 
> Hi group,
> I send this message again because I discovered, that together with the first
> message I had attached a picture of my first developed maco-film. Just to
> show you what problem I encountered. WJ hasn't sent it to you as according
> to the list-rules it is forbidden to attach pictures. Sorry WJ!  I will now
> take up a link in this message to the said picture of the faulty negatives.
> 
> I shot my first Maco-film 35 mm. This is the pre-production type I got from
> Hamburg. Sensitivity up to 820 NM. (the new films will go to 840 NM!).
> My experiences are as follows:
> 1. developed in XTOL 1+1  12 minutes  at 21 degrees C.
> 2. with #25 red filter there are no wood-effects, so use a stronger filter
> 3. with #89B or B+W092 the exposure index should be 25 ASA, this is the
> ideal type of filter for this film. Gives sharp, fine grain and contrasty
> negatives with excellent wood effect.
> 4. with #87C the exposure index should be set at 12 ASA.  Negatives still
> very thin. I have to do more tests.
> 
> There is however a mystery:
> See link to the first 6 negatives.
> http://home.wxs.nl/~losjb/macofilm.jpg
> I never got these strange
> negatives before. This is the second film, the first film had the same
> problem. The rest of the film as from negative nr. 6 is OK, it's only the
> first beginning. Both films were (un)loaded in absolute darkness as I always
> do with HIE. The camera is working properly. I suspect the films as they are
> pre-production samples and the cartridges do not look very sturdy.. Who
> knows the answer? I have sent copy of this message also to Maco in Hamburg.
> Maco please react.
> 
> Last question: why must the anti halation coating be washed off  prior to
> film development?  This is recommended by the manufacturer. This coating
> will be washed off automatically during development of any film as usual?
> Why this special treatment  and an extra step in the development process for
> Maco? I can't see the sense of it!
> Greetings,
> Jaap Los
> The Netherlands
> 
> See also my infrared photography homepage at:
> http://home.wxs.nl/~losjb/hometest.html
> with lots of infrared photographs, some of them lith-printed.
> 
> See alo my website
> http://home.wxs.nl/~losjb/JBLhomepage.html
> for those who are interested in company matters
> 
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