HIE in D76 -Kodak info

[alan.bradford@xxxxxxxxxxxxxxxx (Alan Bradford)]

     Having just started with HIE I was asked Kodak why the times for 
     processing HIE in D76 on Data sheet packed with the film differed from 
     the other data sheets issued by Kodak. My question is summarised below, 
     Kodak's response is at the bottom.
     
     -------------------My Question to Kodak (summary)----------------------
     
     Using HIE with a 25A Red filter at ASA 50 under studio flash.
     
     Now I would usually use the data that comes with the product, but in 
     this case it seems to be either wrong in the majority, or indicating 
     that HIE 2481 35mm has changed spec? Whilst I realise that with this 
     film there are no fixed times only starting points, I would like to 
     start at a common base. Also as I am looking for large grainy negatives 
     I would like to try pushing the film.   
     
     KP 110372 4-97 data info that came with the film says CI 0.70 D-76 20 
     deg C 8.5 mins
     
     TECHNICAL DATA SHEET F-13 on HIE from www.kodak.com in small tank 
     CI 0.70 D-76 20 deg C 11 mins
     
     TECHNICAL DATA SHEET  J-78 on D-76 from www.kodak.com in small tank 
     CI 0.70 D-76 20 deg C 11 mins
     
     TECHNICAL DATA SHEET ED-1 on processing from www.kodak.com in small 
     tank
     CI 0.70 D-76 20 deg C 11 mins
     
     
     1. Which is correct here? have there been film changes/D-76 composition 
     changes or is this simply an error?
     
     2. If I uprate to HIE what % development increase might be a good 
     starting point?
     
     
     ---------------------Kodak Response -----------------------------------
     
     We did change the recommendations for processing HIE in D-76 (about a year 
     ago) to reflect the results of new testing.  The new recommendations that 
     are packed with the film are correct to yield a normal contrast/density. Of 
     course, test, but base it  on the 8.5 time and push it by increasing about 
     25% per stop to bump up contrast.
     
     ------------------------------------------------------------------------
     
     Hope this is of use.
     
     Alan Bradford
     
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