[pure-silver] Test of Efke Direct Positive Paper

I purchased a package of the Efke Direct Positive B & W Positive Paper from 
Freestyle a couple of months ago.  Freestyle claimed the ISO was approximately 
1 to 6.  To test the ISO I loaded the paper into film holders ands exposed them 
in a Miniature Speed Graphic, which has a pretty accurate Supermatic shutter.  
The day measured to be a perfect Sunny 16 on my Gossen Luna Pro meter.  I made 
a series of exposures at f/16  starting at 1/2 second, then doubling the time 
for each successive photo.  I developed the prints in Ilford developer, 1:14, 
for 1.5 minutes.  I scanned them on my Epson 1680 at 96 dpi, with no 
manipulation.  The results are shown at this Flickr site :



http://www.flickr.com/photos/29332295@N03/?saved=1




It appears the 2 second exposure is the best, though a finer test from 1.5 to 
2.5 sec. would be useful.  But assuming the 2 second exposure is right-on, then 
the reciprocal of 2 should be the ISO, or 1/2, for an ISO of 0.5.  Am I correct 
in this?  The next project with this paper is to use it in my Gordon Street 
Camera, sometime this fall.




The other photo on the site is me in my darkroom with my Folmer & Schwing 4 X 5 
aerial camera, circa WWI.




Marty 

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