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Alexandra wrote:

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What pens are you using? I haven't had flow issues at all whether nibs be wet or dry. I hope you find just the right pen for it. 

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 Actually, it was my fault. I started with a new Kaweco Sport broad nib but hadn't cleaned the nib before use so writing felt chalky. After cleaning the nib, I noticed that flow was dry-ish so I spread the tines a bit and that fixed everything. 

The other pen I tried, also untested, was a vintage Waterman Stalwart with a semi-flex nib. The combination is excellent, color-wise but I think I need to refit the nib and feed into the section. I suspect that the nib isn't far enough into the section to get me consistent flow. 

What I might do for a better test run with this ink is use it in one of my pens which I know has no issues. That'd be the "fair" way of making an evaluation. 

Still, despite the issues, the color looks fabulous. I'm becoming quite a Diamine fan. Syrah is a burgundy red and leaves no stains, even in demonstrators. My Kaweco demonstrator is strange in that when you use it as an eyedropper, you can see the ink that seeps into the section. I removed the red from the section by putting soapy water into the barrel and letting it seep out on tissue. I had to do this twice but it's better than flushing until I turn blue. No red stains, but what a color :)