This profile won't allow softproofing to be accurate, and it has black point at L=27. Normally this paper has black point (measured) as L=20.
I think you nailed it.......I was just looking a PDF I put together some months back showing results using Breathing Color's Lyve Canvas (different, I know, but the results are comparable). I'd also comment that an L*=27 sounds like uncoated PhotoK ink, not MatteK ink. If you're not coating, MatteK is almost a must...if you're coating with a satin or gloss finish, you can definitely get away with using PhotoK ink. My numbers below are from using Timeless Satin coating.
Here's some numbers I had from my Lyve Canvas profiles:
Epson 9600, MatteK inkUncoated: minL*= 19
Coated: minL*= 13
Epson 7800, PhotoK inkUncoated: minL* = 27
Coated: minL* = 16
You can see from this that coating the canvas is the great equalizer when using either MatteK or PhotoK ink and lowers the minL* into the teens, perfectly adequate for a good soft-proof.
[of course the REAL trick is to use a Spectrolino/Spectroscan with a polarization filter...then you just measure pre-coat and move on!
]
terry