Re: HP5, Delta films and reciprocity

on 20/7/02 12:11 pm, John Yeo at jonnieo@thegrid.net wrote:

I use the formula, y=.91x^1.51, where x is the metered time and y is the
corrected time. It approximates the reciprocity pretty closely, and has
worked for me for exposures up to 2 hours on FP4+, which shares the same
reciprocity failure as HP5+. I've always processed normally, with pmk
pyro.
 
John
 

This is fantastic John.

Please excuse my ignorance but does the little arrow after the x mean raised
to the power of?

Alexis

 
Received on Sun Jul 21 01:10:50 2002