Recording Ink — Violet
Violet ink for barographs, thermographs, hygrographs and other self-recording instruments with a pen nib. Made to a traditional glycerine formula: it dries slowly in the pen, won't clog the capillary, and lays down a clear, saturated trace on paper charts. It won't dry out during long storage in the instrument's pen.
The 15 ml matte black glass bottle blocks light completely and extends the ink's shelf life. The included dropper makes dosing — and, above all, filling the pen — precise and clean: a single drop goes exactly where you want it, with no overflow or splatter.
Instructions: Before first use, clean the pen with alcohol to remove any previous ink. Use the dropper to place a drop of ink into the pen; run a thin object or the edge of a sheet of paper between the tips of the pen to draw the ink down to the point.