Little follow up on paper reacting to UV light

Little follow up on paper reacting to UV light.

This is a short video of Midori MD Cotton paper under a microscope with and without UV light. I'm moving the light on and off the paper. You can see the UV invisible ink glow when the UV light hits it. The rest of the paper doesn't change color at all. That's what makes a particular paper type a great medium for fluorescent inks, since it ends up providing the best contrast.

Here are two microscope images at opposite ends of the reaction spectrum from paper I had handy.

The first image is Midori MD Cotton, which as shown in the video is practically perfect.

The second image is Clairefontaine Triomphe which reacts highly to UV light. The paper glows nearly as much as the ink, which ends up with very low contrast.

Both are great papers for regular fountain pen usage, but for fluorescent inks they are miles apart.

Imported from Mastodon