Digital BW, The Print

----- Original Message -----
From: "Jon Cone" <piezobw@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Cc: "Bill Bergh" <bill@...>; "Lynne O'Hara"
<lynne@...>
Sent: Monday, October 14, 2002 11:06 AM
Subject: [Digital BW] Re: PiezoTone Black Fade Test


(snip)
>
>
> 50% Patch Comparison of PiezoTone and MIS by Paul Roark
>                         PT 50%      MIS-FS 50%      MIS-FSN 50%
> Optical Density         0.64        0.66            0.71
> 600 hours               0.63        0.54            0.59
> % of fade               2%          18%             17%
>
>
> The fade rate of 2% is unprecedented.

Jon,

I just want to add that my own window fade test confirmed the fade
resistance of the Selenium PiezoTone gray inks with values from 0 to 85 dot%
showing only 0 % to 2% fade which is at the limit of the accuracy of my
Spectrocam spectrophotometer. There are a couple of odd readings in the data
which indicate that my instrument is not really up to measuring changes this
small. For all practical purposes there was no fade in the grays in my test.

Likewise my test showed the amount of warming in the grays was extreme low
with the change in C-Y averaging 0.01 unit.

They are continuing to give me the best prints yet.

Martin Wesley


(snip earlier)