Fading of patch sheets in the dark

mikling

Printer VIP
Platinum Printer Member
Joined
Jul 2, 2006
Messages
3,238
Reaction score
1,470
Points
313
Location
Toronto, Canada
Here's the thing. In the real world pigment inks even aftermarket ones far outperform dye inks even OEM. That indicates that for many situations the test performed by the above outfit leaves a lot of real world issues out. I can point out a flaw in the process that parallels a flaw NASA made and subsequently discovered in the 60s in simulating aging but I won't open up a can of worms. ( Here's a hint, fading occurs at the electron level and involves energy levels. Can we get a "soft" action in that process. What happens when you increase the energy levels... is the effect proportional?)
In nearly 20 years of using aftermarket pigment inks, I know of really no one who has been disappointed and never had to address any issues in that area. That to me is the real world. I always recommend using pigment inks when fade is a concern and with printers that can output prints that can come close to the best dye ink printers,
Go with a pigment ink printer that uses CO or GLOP and most will be pleased.
Back in the 70s according to all tests performed to that date indicated all amplifiers should sound the same when they showed the same results in the tests. They did not. The tests performed were inadequate. Pity those thinking the tests were correct because the tests omitted many issues not yet uncovered. That is science. Once you discover facts that do not track the tests, you need to question the test and its validity and start over again with newer and more sophisticated testing. Otherwise you MUST warn the viewer of the limitations of the tests performed.
 
Last edited:

Ink stained Fingers

Printer VIP
Platinum Printer Member
Joined
Dec 27, 2014
Messages
5,694
Reaction score
6,773
Points
353
Location
Germany
Printer Model
L805, Pro7600, WF2010,ET8550
You are right that we shouldn't open a can of worms in this forum nor tracing NASA flaws, but it would help a lot for users here to understand whether the Wilhlem Research documents referred to have still some validitiy or none at all - and if that flaw affects as well other test reports of that institute.
But beyond that I think we can close the discussion at this point. I just will report the dark fading data of my current test as the data develop over time
 

aCuria

Printing Apprentice
Joined
Aug 18, 2023
Messages
46
Reaction score
0
Points
11
Printer Model
Canon 5070, Epson L10850
A test with 107 inks would be greatly appreciated 😂
 

Ink stained Fingers

Printer VIP
Platinum Printer Member
Joined
Dec 27, 2014
Messages
5,694
Reaction score
6,773
Points
353
Location
Germany
Printer Model
L805, Pro7600, WF2010,ET8550
How long do you think I should dry the prints before making a profile with 107 inks?
You see in the reported numbers that the colors are drifting for quite a while, I'm normally scanning the profile patch sheets after a day to calculate the profile, I may do it quicker - e.g. after one hour - to get a feeling about the profile - like profile volume or black level, but I rescan the sheet after a week for paper profiles which I'm going to use for a longer time.
 
Top