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--- projects:crokinole_board:work_logs:work_log_4 [2019/07/10 12:33] – tjhowse
+++ projects:crokinole_board:work_logs:work_log_4 [2022/01/23 00:23] (current) – tjhowse
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+[<6>]
 ====== What I want to accomplish ======
   * Determine how to mark the lines on the board.
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-I attached a bolt to the side of a router dremel attachment, thinking the smaller tool would give me more control, but I didn't have good success here either. Though I got nice clean grooves cut in scrap wood when freehanding, I couldn't get reliable results when drawing bit circles. It was too easy for the pivot to jam slightly, or the dremel to tip, and ruin the groove.
+I attached a bolt to the side of a router dremel attachment, thinking the smaller tool would give me more control, but I didn't have good success here either. Though I got nice clean grooves cut in scrap wood when freehanding, I couldn't get reliable results when drawing big circles. It was too easy for the pivot to jam slightly, or the dremel to tip, and ruin the groove.
 Instead I decided to go with a black permanent marker. I can easily build a lightweight circle-drawing jig. If it goes bad I can simply wipe off the ink with a solvent. I ran some trials and got some good data.
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 The marker I used.
-I had gone through five varnish -> light sand cycles to this piece of scrap ply before drawing on it with the marker. I drew some straight-ish lines, a black patch and a big squiggle and let the ink dry for half an hour. I then drew some fresh lines as a comparison a few minutes before varnishing. I noticed that some of the ink had wicked out slightly from the lines. I suspect this would be wicking along the scratch lines from the sanding.
+I had gone through five varnish -> light sand cycles to this piece of scrap ply before drawing on it with the marker. I drew some straight-ish lines, a black patch and a big squiggle then let the ink dry for half an hour. I then drew some fresh lines as a comparison a few minutes before varnishing. I noticed that some of the ink had wicked out slightly from the lines. I suspect this would be wicking along the scratch lines from the sanding.
 The ink did not streak or bleed during or after the varnishing! Great success!
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+These photos show two coats of varnish atop the ink.
 I think my solution to this will be ensuring my varnish sandings are sufficiently gentle, and perhaps re-marking lines if they start to fade during the subsequent varnish layers. Overall I think this technique looks great and it's likely the one I'll be using on the final board.
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   * Drill the hole in the centre of the top,
   * Attach the bands to the base.
+[<6>]