Re: Fw: IR 750 Sensitivity

[ADavidhazy <ANDPPH@xxxxxxxxxxxxxxxxxx>]

> OK, list; here's the answer I finally got; Andy Davidhazy, what do you make
> of this???  Hey, I'll let you be the one to process it under a green light
> and tell me if it gets fogged or not. Me, I'll just not trust it...
> Chris

Veeerrrryyy interesting. Just remember that I claimed to have made this
deduction, based on postings on this list, first!   ;-)  call it the Davidhazy
and Company safelight processing guide for Konica 750 film!

BTW, please note that even if this IS true (which I very much doubt) you would
need an IR absorbing filter in addition to the green filter to use as a
safelight ... unless the green filter one happens to get is opaque to red and
very near IR ... as well as to blue of course.

adios,

Andrew  o o  0 0 o . o  Davidhazy, Imaging and Photo Tech
         \/\/\/\/\/\/          http://www.rit.edu/~andpph
__________|        |_____________________________________


> ----- Original Message -----
> From: Todd Tereshkow <Tereshkow_T@xxxxxxxxxx>
> To: <tracez@xxxxxxx>
> Sent: Monday, November 06, 2000 6:09 PM
> Subject: IR 750 Sensitivity

> > Christina,
> >
> > Thank you for your interest in Konica IR750 film.  The film
> > is essentially blind in the green part of the spectrum.  The red filter
> will
> > give you the most vivid IR effect compared to the orange filter.  I would
> > recommend that you experiment with both filters and bracket the exposure
> to
> > find the appropriate exposure level and IR effect that you are looking
> for.
> >
> > Regards,
> >
> > Todd O. Tereshkow
> > Vice President Technical Service
> > Konica Photo Imaging
> > 725 Darlington Avenue
> > Mahwah, NJ  07430
> >
> > Phone: (201)574-4070 E-Mail:  tereshkow_t@xxxxxxxxxx
> > <tereshkow_t@xxxxxxxxxx>
> >
> >
> >
> > -----Original Message-----
> > From: Christina Z. Anderson [mailto:tracez@xxxxxxx]
> > <mailto:[mailto:tracez@xxxxxxx]>  <mailto:
> > Sent: Friday, October 27, 2000 10:41 AM
> > To: film@xxxxxxxxxx <mailto:film@xxxxxxxxxx>
> > Subject: Konica 750 spectral sensitivity
> >
> > I've been trying to call tech help and can't seem to locate the correct
> > place!.  I have your technical data sheet with the graph of spectral
> > sensitivity of Konica 750 Infrared.  My question is this: is it BLIND to
> > yellow and green light waves, as the graph looks like it shows, or is it
> > just less sensitive in this area between 520nm and 650nm?  Do you get
> equal
> > results with the orange 15/16, red 25 and red 29 filters therefore?
> > Thanks in advance
> > Chris Anderson
> > PS I know you are discontinuing this film but I have it
> > still.
> >
*
****
*******
******************************************************
*  To remove yourself from this list, send:          *
*         UNSUBSCRIBE INFRARED                       *
*       to                                           *
*         MAJORDOMO@xxxxx                            *
*----------------------------------------------------*
*   For the IR-FAQ, IR-Gallery and heaps of links:   *
*  http://www.a1.nl/phomepag/markerink/mainpage.htm  *
******************************************************