My James Bond poster illuminated under 660nm Deep Red loses the red box/circle. Bizarre

Mostly posting this to test out Lemmy and add some content for you lovely folks to scroll through.

My poster normally has a red box with a white circle in it surrounding the silhouette of Bond, but when I shine a deep red light (D4SV2) at it, the red box disappears!

And yes, I need to hang it...

Edit: Weird, the image got rotated after uploading. ¯(ツ)_/¯