u/Applesorbannans

So I've been tasked in shooting a hair swatch. Goal is to get truest color. Shooting with a cannon 100 macro lens f8 100iso 5500k. These images aren't edited at all straight from cam. One issue is the samples are thin and I can see the photo paper thru it one is more dense and it shoots better imo but then when i crop to 1x1 they look like garbage. Help