MDF scratches

I try to create scratches to similar MDF panel
Like so

My nodes is


This is not exactly what I was counting on.
I would like a strip of deep and small scratches on the first photo, but for some reason they look the same, although in b.w. have different bright.

Stretch Voronoi intensity for scratches, not noise textures. You can also use voronoi cells with the same settings, slightly rotated from one another.

What you’re trying to do you can see info about on Sizzler’s blog about his procedural wood: