Re: Epson R2400 inks density

To: alt-photo-process-l@usask.ca
Subject: Re: Epson R2400 inks density
From: Alberto Novo <alt.list@albertonovo.it>
Date: Thu, 30 Apr 2009 14:39:15 +0200
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In-reply-to: <38828.62.244.225.182.1241094272.squirrel@loris.medici.name>
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References: <C61F4AE6.EC64%henry.rattle@ntlworld.com><38828.62.244.225.182.1241094272.squirrel@loris.medici.name>
Reply-to: alt-photo-process-l@usask.ca

It happened that inverted the meanings of I and I0 in the absorbance formula. This below is the correct one:
A= -log10(I/I0) = log10(I0/I)
I= transmitted light (that is, after it passed through a specimen)
I0= incident light (before passing into the specimen)
I/I0= T= transmittance
Alberto

References:
- Re: Epson R2400 inks density
  - From: Henry Rattle <henry.rattle@ntlworld.com>
- Re: Epson R2400 inks density
  - From: Loris Medici <mail@loris.medici.name>