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2025/07/10 - Guild Meeting - Green to Clean with Karl Koch

Green to Clean: An exploration into drying methods for rough turned bowl blanks – with Karl Koch

  • Thursday July 10th
  • Hybrid: Live at NCSU Crafts Center and by IRD Broadcast via Zoom
  • Zoom call opens a 6:15 for socializing
  • Meeting begins at 6:45 PM
  • Demonstration begins at 7 PM



Do you have access to downed green wood but then have struggled with how to begin the drying process?  Perhaps you are not sure what steps to take to dry your wood.  Or, does your current method produce more cracks or movement than you expected or liked?  If so, then this month’s demonstration on different methods to dry wood, through an extended experiment, will provide insights into the many possibilities available.
 

Turning bowls and other forms from green wood has been practiced for centuries. But, because wood shrinks a small amount along the grain but quite a bit more both radially and tangentially to the grain, bowls turned from green wood are prone to warp to an oval shape as they dry. This difference in drying can make checking and cracking likely, depending on the type of wood and the speed of the drying process.

Over a 6-month period, Karl Koch has tested different methods of drying rough-turned bowl blanks using wood from the same tree (to help minimize variables.)  These include boiling, microwaving, kiln-drying, soaking in denatured alcohol, coating with Anchorseal, wrapping with plastic film, soaking in a soap solution, drying in a paper bag with wood shavings, and just setting the rough blank on a shelf. 

In this demonstration Karl will share his results with everyone and “MAY THE BEST BOWL DRYING METHOD WIN!”



About our Demonstrator:

Karl Koch lives in Wake County and has been using the lathe as a creative tool for about 10 years. A former resident of coastal NC, most of Karl’s wood for turning came from hurricane debris.

His turned pieces reflect a varied background in archaeology, still photography, film and video production, architecture, sculpture, and performance art. Much of his work is burned, textured, colored, and carved to appear worn and weathered.

Most pieces imply a history or narrative. Some are simply explorations into color, texture, and form or created to ask the question “What if?”

Karl can be found on Instagram as “karlkochwoodturner”.