After reading this I bought a bottle of the Hahanmuele Matt yesterday. Might as well use watered down white paint. It's super thin so tough to spray evenly. I then tried rolling it on and again, it looks like you brushed on a very thin layer of white. Nowhere near the blacks of BC. I am mixing matte with just a little satin and liking it even better.
Hm... Some things come to my mind:
1) Sure you mixed up the content of the bottle thoroughly? I once wondered why the solution had become so thin, until I realized some of the material had sunk to the bottom of the bottle - and stayed there :-)
2) Yes, the "lustre sheen" of BC's varnish makes blacks look deeper - but I understood your first post as a search for a really matte surface.
3) I roll varnishes, never spray them. For this purpose I use two rolls - one to apply the varnish, another, clean one, to remove excessive material after 3-5 minutes. The white appearance of Hahnemuehle 's varnish disappears with that second roll, at the latest after drying. As you mentioned buying the bottle yesterday - how does it behave after drying?
4) The canvas I use is Canson Museum Pro Canvas Matte - perhaps the varnish reacts differently on BC Lyve...
Just my 2 cents.
5) Just found
this post of yours - so I think you would not like the "dead matte" I like about Hahnemuehle's... Sorry if I pointed you to the wrong direction.