Photographing pyrography

I’ve been trying to get good images of my “fire-drawings” but I’m finding it difficult. My digital SLR doesn’t do so well with the subtle differences between the pale color of the wall and the color of the paper; I’m losing detail in the burned sticks and the scorched edges of the lines. My usual settings for photographing paintings didn’t work well (aperture priority, F22, ISO  100, Adobe RGB color space, RAW file format, White Balance custom set to my lighting), and so far, neither does High Dynamic Range. I tried both with 45-degree raking lights and with indirect lights bounced off the ceiling. Suggestions welcome!

Used HDR on this one, but most of them were out of alignment and fuzzy.

The color isn’t so bad, but there’s no detail in the sticks.

I’m getting glare on the right side. The wall looks too blue, the piece too brown.

Probably the best capture.