"Rainbow Roses: Not Quite Right, But Still Interesting"
"The setup: red, green, and blue dyes. Split the rose's stem into 3 parts. Use plastic wrap to keep the stem happy.
The dyes: Danish. The green is very opaque, the red is slight, and the blue is transparent. I think these are real pigments, not just dyes.After 18 hours - blue spots.
After 36 hours - more blue spots on the petals and on the leaves. Close up after 36 hours - the rose is not happy."
That's a very detailed description of a random fetishist (your personal enemy perhaps), and 'understand' barely covers the talent and material knowledge required to make many of these, plus some people really can't see why it's different (the Christmas tree literally just needs the balls added).