On Tuesday, October 7, 2014 9:17:09 PM UTC-4, Tom Miller wrote:   
   > "Phil Hobbs"  wrote in message   
   >   
   > news:54348A75.2090401@electrooptical.net...   
   >   
   > > On 10/7/2014 8:19 PM, ggherold@gmail.com wrote:   
   >   
   > >> On Tuesday, October 7, 2014 3:03:37 PM UTC-4, Phil Hobbs wrote:   
   >   
   > >>> On 10/07/2014 01:30 PM, Glen Walpert wrote:   
   >   
   > >>>   
   >   
   > >>>> On Mon, 06 Oct 2014 23:08:01 -0400, Phil Hobbs wrote:   
   >   
   > >>>   
   >   
   > >>>>   
   >   
   > >>    
   >   
   > >>>> Out of curiosity I did a quick check and found that Tri-X is still   
   >   
   > >>>> available, possibly Plus-X also, old stock in both cases.  A search   
   >   
   > >>>> will   
   >   
   > >>>> turn up the Kodak data sheets with density curves showing about 0.3 to   
   >   
   > >>>> better than 2.3 available with exposure and processing per the data   
   >   
   > >>>> sheet.  Density range of both films is about the same, possibly the   
   >   
   > >>>> smaller grain size of Plus-X or some other film would be advantageous.   
   >   
   > >>>   
   >   
   > >>>>   
   >   
   > >>>> Cheers,   
   >   
   > >>>>   
   >   
   > >>>> Glen   
   >   
   > >>>   
   >   
   > >>>>   
   >   
   > >>>   
   >   
   > >>> The newer stuff is called Tmax.   
   >   
   > >> Back in my mis-spent youth, we had a dark room and I did some BW   
   >   
   > >> developing.   
   >   
   > >> But no more stinky chemicals for me.   
   >   
   > >> Could I do an exposure, and have someone turn it into a negative with   
   >   
   > >> controllable properties? No automatic gain control in the development   
   >   
   > >> process. (ND between 0.3-0.5)   
   >   
   > >>   
   >   
   > >> George H.   
   >   
   > >   
   >   
   > > Dunno.  I used to process my own film too (b&w prints and colour slides),   
   >   
   > > but not since about 1980ish.   
   >   
   > >   
   >   
   > > I'm looking at sun-sensor eyeglass plastic for instrument applications.   
   >   
   > >   
   >   
   > > Cheers   
   >   
   > >   
   >   
   > > Phil Hobbs   
   >   
   > >   
   >   
   > >   
   >   
   > > --   
   >   
   >   
   >   
   > You might go to a place that installs window tinting and ask to see their   
   > stock. They also will have a densitometer to read the tint material. There   
   > are many shades of neutral density filters.   
      
   I did try a piece of the window tinting reflective stuff... The one piece I   
   looked at had an ND a little less than 1.0 at 780 nm.  It's reflective though.   
      
   George H.   
      
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