We are getting closer. Of course, if the clouds would be consistently gone and the UV radiation consistent life would be easier.
But it does seem that really coating the paper heavily with a sponge brush works better than using a glass rod. More seems better. We've been guessing at the curve we need to make the neg work, and we seem to have one for this photo. Whether it works for all or most photos has yet to be seen.
This curve opens up the shadows just a little makes the highlights not as bright. It and isn't nearly as flat as the ones we've seen offered as "standard" cyanotype curves.
Of course, it get's an invert adjustment layer on top so it will be a negative.
We'll adjust as we learn more. But as they say in Westeros, "Winter is coming." which means less UV and more clouds.