Lightfastness test of Derwent Lightfast color pencils, 72 color set.
Photo taken with indoor warm LED lighting, open curtains, cell phone camera. I had to adjust the photo in Gimp. While in Gimp, I added a note that the color changes on the left edge don’t really exist. It’s an artifact of the photo.
3 months on the indoor side of a window overlooking a blazing hot patio in the summer, 16th of May until 16th of August 2021, latitude 33.97 N.
The strip in the MIDDLE of the photo is the strip that spent 3 months in the sun. The upper strip spent a few days in the sun, until I realized my mistake. I smeared the swatches on that upper strip while I was cutting it off.
The bottom strip with the writing spent the entire time in a dark drawer. The upper strip joined it quickly.
Also, I forgot to fill in a swatch on the bottom strip, but I did make the outside marks, so there might be enough for comparison.
In the photo, I see a slight difference in Venetian Red and Ruby Earth. In real life, I have to stare to see it.
Venetian Red is PW6, PY42, PR101 and PBK7.
Ruby Earth is PR101, PB29, PV16, and PW6.
But the change is so slight, it’s practically invisible.
Stare over at the Titanium White tints I smeared onto Deep Rose. The samples in the sunlight changed. Actually, more noticeably in real life.
Deep Rose is made with PV19 and PW6. The site Art is Creation says that PV19 fades or dulls; hue shift toward blue: http://www.artiscreation.com/violet.html#PV19
But Deep Rose by itself didn’t change! It’s in the top strip, near the middle.
Eh, Deep Rose has titanium in it. Titanium White on top dulled it, but not when mixed in??? I don’t know what happened. I don’t knoooooow.
My opinion? I’m absolutely delighted with Derwent Lightfast. I’m not delighted with my botched testing. The samples are fantastic, though. Even the heat from that window didn’t change them in any significant way.
cindy moon mckee 