korny
Getting Fingers Dirty
Old timers in this forum have, Im sure, seen this old Wall Street article I point out below.
I simply found it interesting.
I stumbled on it because someone in the forum had mentioned the so called "egg yolk test" which, if I understand correctly, is a simple indicator to see if an ink is of high quality or not. The test checks to see if a black pigment droplet will separate in a pool of yellow dye ink or stay put (not dilute). There is some serious chemistry involved in pulling that off, I take it.
....just be aware that this article is close to five years old now..
"HP Chemists Hunt Violators Of Ink Patents"
http://people.ischool.berkeley.edu/...ock-in/Articles/ink-jet-patent-violators.html
MY SUMMARY -- 2006 WSJ report:
HP (had) a 50% marketshare
4000+ patents on file on ink
80% of HPs $5.6B profit is on inks and toner
Lawsuits against anyone copying the ink, too well
HP has intensive daily in-house testing of ink copies they find..
The simple egg-yolk test indicates high quality ink, (perhaps patent infringing)
I simply found it interesting.
I stumbled on it because someone in the forum had mentioned the so called "egg yolk test" which, if I understand correctly, is a simple indicator to see if an ink is of high quality or not. The test checks to see if a black pigment droplet will separate in a pool of yellow dye ink or stay put (not dilute). There is some serious chemistry involved in pulling that off, I take it.
....just be aware that this article is close to five years old now..
"HP Chemists Hunt Violators Of Ink Patents"
http://people.ischool.berkeley.edu/...ock-in/Articles/ink-jet-patent-violators.html
MY SUMMARY -- 2006 WSJ report:
HP (had) a 50% marketshare
4000+ patents on file on ink
80% of HPs $5.6B profit is on inks and toner
Lawsuits against anyone copying the ink, too well
HP has intensive daily in-house testing of ink copies they find..
The simple egg-yolk test indicates high quality ink, (perhaps patent infringing)