Optical brighteners - and their fading

The Hat

Printer VIP
Platinum Printer Member
Joined
Jan 18, 2010
Messages
15,617
Reaction score
8,691
Points
453
Location
Residing in Wicklow Ireland
Printer Model
Canon/3D, CR-10, CR-10S, KP-3
@Ink stained Fingers, why don’t you test the O/B paper first, on your next exposure test hang an unprinted O/B sheet out with your test samples and after your allotted prescribed time bring it back in doors.

Now print an image on the exposed O/B paper, and then print the same image on a new O/B sheet straight out of the box, then hang both images out together, time will tell something...
 

Ink stained Fingers

Printer VIP
Platinum Printer Member
Joined
Dec 27, 2014
Messages
5,837
Reaction score
6,964
Points
363
Location
Germany
Printer Model
L805, WF2010, ET8550
I did a simple test and placed an unprinted sheet of Netbit paper out into the sun, together with the DL ink patches.
Most of the optical brighteners in this paper are gone after 2 weeks as viewed under UV light
Fading OB.jpg
The paper is clipped into a poster rail at the bottom, this stripe is unexposed and lighter with the OB's still active.
The OB's are vanishing very fast, even faster in the cheaper coast coated papers, this raises the overall question how and whether they should be considered at all in the profiling process.
 
Top