Digital BW, The Print

>> Is there any comparisons available that shows the longevity of 
>>Ultrachrome inks vs. Carbon Inks such as f.ex. MIS Quadtones?

>Inkjet mall's website has a comparative analysis of Ultrachrome, 
>various Piezotone (carbon) inks , Sundance and MIS-FS inks based on 
>1000 hr xenon lamp tests.  ... Here's the link:

>http://www.inkjetmall.com/store/info/1000-hours.html

Well, let's think about this.  According to the InkJetMall test the UC Light
Black faded 6.02% whereas the PT WN dark gray faded only 0.84%.  So, it's
over 7 times better than an ink that is rated at over 100 years.

Is this believable?

My tests show the PT inks to be about like the UT inks and UC black & light
black inks.  They are so close I can't say one is better than the other.

Paul
www.PaulRoark.com