I'd be interested in hearing how it looks when you push the Gaffer durissimo that far, David. Stiff is one thing (as Pete says, alumina will get you that) but if it doesn't stay jet black at a hair's thickness....then what's the point?
Lino's rosin black was all that, but the melts he was doing at the old Manifesto facility were kind of unpredictable. Very fine bubbles would only appear in the final application, but not in the initial cane pull--occasionally. It was impossible to know if you had a good melt until you had taken it that far, but by then you were stuck with whatever you had. Lots of it went into the landfill.
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