A new test in the offing

[Paul Verizzo]

I have printed four, um, prints using my Color/B&W TSS image, but tiled with four images per page. On three papers, Ilford Galerie Smooth (microporous,) HP Premium (swellable polymer,) and Royal Brites Matte (I thinks it's microporous since I can't get it to smear right after printing.) I will treat each quadrant as follows:

1. Nothing
2. Spray several times with a solvent based fabric UV inhibitor, ForceField UV Sun Block.
3. Spray with Krylon UV spray
4. Both 2 & 4.

Oh, yes, Canon generic dye inks. I'm not trying to compare the generic to Canon, only the various treatments.

Will place in the Florida sunshine, still pretty bright in December. Keep there until I see fading changes.

Will update sometime. Rather later than sooner, ha ha.........

 

[Paul Verizzo]

22 hours later: changes, already!

Wow! About 8 hours of direct sun, and about four of cloudy skies (almost as much UV,) things are already shifting. Using the B&W portions as the canary in the coal mine, again, the Ilford Smooth is moving towards green, The Ilford premium still looks good, and the Royal Brites Matte is warmer.

 

[Paul Verizzo]

First results in, only three days in (winter) sometimes sunny, sometimes cloudy Florida. Things started happening after only one day! The papers were held down to the pool deck with big pieces of lead of about 3.5" hexagonal diameter, which also then gave an unexposed portion.

First three papers are HP Premium (a swellable polymer,) Royal Brites cheap matte, a winner in the dark storage test, and Ilford Smooth, the latter two microporous type.

All received the following treatments:

Upper left, nothing
Upper right, a fabric UV blocker, ForceField brand "UV Sunblock." Available onine or in sewing centers.
Lower left, Krylon "UV Archival" semi-gloss clear spray.
Lower right, both the fabric UV blocker and the Krylon.

As in my five year "virtual dark and w/o air circulation" storage tests, http://www.printerknowledge.com/threads/five-year-color-shift-test-results.9576/ I look to the B&W side of the test image to see the changes. The sins can hide in the color portion, but the truth is in the B&W.

I'll try to get some scans up in the next day.

Narrative results:

The Royal Brites that did so well in the dark test committed suicide once in the sun, regardless of treatment.

The HP Premium suffered color changes equally across every treatment. The good news is the degradation isn't terrible, although certainly not for quality display.

The Ilford Smooth had some warming in the "no treatment" and "both" quadrants, did very well in the fabric UB blocker only quarant - almost like original - and in between results in the "both" quadrant.

At this point, if I was to put any money on any post-printing treatment, it would be with the fabric UB blocker. It is certainly possible that the varying results may have to do with unequal application rates. I will pay special attention to this in the next batch:

Arista II Lustre
Canon Photo Paper Plus Semi-Gloss
HP Everyday (swellable polymer) glossy. I have, over and over found this emulsion more appealing than HP's Premium.

Coming up:

Epson "Photo". Do you mean glossy, or what?
Inkpress Lustre
Inkpress Baryta. Which BTW, the above Epson "Photo" has a paper base whiteness almost like this warm paper. Not so much white.

Stay tuned!

 

[Paul Verizzo]

Scanned and permanent link for all new protective coatings tests: http://1drv.ms/1HBawRn