Hi Kate, welcome to the 'Critique Zone'! This is all completely subjective, so please take anything useful...
Overall, I am not sure where this photo is supposed to be taking me. I love your concept with the abstract crinoline - it gives you all sorts of lines and play with the light, but I am not sure it fits with the theme, and I think your capture could be 'tinkered' with.
Technically: Using such a wide aperture was an ambitious choice - limiting your depth of field to such an extent doesn't seem to have given you the choice about what to bring into focus and what to leave out. Sticking it at ISO 1000 also seems unnecessary - to achieve a decent shutter speed you could probably have used ISO 200 here and got a lot less noise, allowing you to capture more detail in the crinoline.
Artistically: As I said before, this is subjective. That said, I am not sure that you have picked something that looks better in negative - I did not initially realise that it was negative. If you had the opportunity to arrange the crinoline into curves or allow it to lead you in and across the photo, it might have been more appealing.
In summary, this is a great, abstract, concept. I think that with a bit more focus on what you want the viewer to see / think, this could be a great shot.
I think the best goal for this challenge it is find a subject that is enhanced by the negative color technique. Unfortunately, I don't think this one works well there, as nothing looks negative or enhanced.
Back to comment and a bump: I'm not sure if I like the negative or positive of this image better. That in itself tells me that the subject matter may be a little weak in wow factor. The best images in this challenge have something that surprises the viewer when seen as a negative. I don't see that here (Maybe because it is b&w). Overall, the technicals are good and the composition is pleasing.
Interesting patterns and depth in some of the photo, but the white blur in the bottom left is distracting to me. Interesting shot though. I'm not voting, by the way, just saying what I see. If you shot from a different angle maybe there'd be more depth to it.