Digital BW, The Print

Well, LAB_L is a cell name; you can read about names in the user guide if
you wish.

Try this, paste the following into cell B1.
=IF(A1>=8,LOG(((A1+16)/116)^3)*-1,LOG(A1/903.3)*-1)

Now if you put 14 in A1, you should see 1.762 show up in B1.

John

-----Original Message-----
From: DigitalBlackandWhiteThePrint@yahoogroups.com
[mailto:DigitalBlackandWhiteThePrint@yahoogroups.com]On Behalf Of Tony Riley
Sent: Sunday, October 30, 2005 8:38 AM
To: digitalblackandwhitetheprint@yahoogroups.com
Subject: RE: [Digital BW] Black Density measurement

I'm sure I need to thank you for your prompt response, John,
But you may not be surprised to know that you've thrown good info at a
phillistine!

I do have excel but how do I set up the conversion?

And just as a taster what would an L* value of 14 equate to?

Interesting stuff for a Sunday afternoon !

Tony R






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