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October 29, 2009, 5:49 am

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The Rope Library

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The Dark halls of the twine library of Granthep are teeming with the blind monks of the grey Order, Their callused fingers running quickly over countless leagues of intricatly knotted ropes, each knot a symbol, and each rope a story.

 

  1. Cellulose: Production begins with processed cellulose
  2. Immersion: The cellulose is dissolved in caustic soda: (C6H10O5)n + nNaOH ---> (C6H9O4ONa)n + nH2O
  3. Pressing: The solution is then pressed between rollers to remove excess liquid
  4. White Crumb: The pressed sheets are crumbled or shredded to produce what is known as "white crumb"
  5. Aging: The "white crumb" aged through exposure to oxygen
  6. Xanthation: The aged "white crumb" is mixed with carbon disulfide in a process known as Xanthation, the aged alkali cellulose crumbs are placed in vats and are allowed to react with carbon disulfide under controlled temperature (20 to 30°C) to form cellulose xanthate: (C6H9O4ONa)n + nCS2 ---> (C6H9O4O-SC-SNa)n
  7. Yellow Crumb: Xanthation changes the chemical makeup of the cellulose mixture and the resulting product is now called "yellow crumb"
  8. Viscose: The "yellow crumb" is dissolved in a caustic solution to form viscose
  9. Ripening: The viscose is set to stand for a period of time, allowing it to ripen: (C6H9O4O-SC-SNa)n + nH2O ---> (C6H10O5)n + nCS2 + nNaOH
  10. Filtering: After ripening, the viscose is filtered to remove any undissolved particles
  11. Degassing: Any bubbles of air are pressed from the viscose in a degassing process
  12. Extruding: The viscose solution is extruded through a spinneret, which resembles a shower head with many small holes
  13. Acid Bath: As the viscose exits the spinneret, it lands in a bath of sulfuric acid, resulting in the formation of rayon filaments: (C6H9O4O-SC-SNa)n + ½nH2SO4 ---> (C6H10O5)n + nCS2 + ½nNa2SO4
  14. Drawing: The rayon filaments are stretched, known as drawing, to straighten out the fibers
  15. Washing: The fibers are then washed to remove any residual chemicals
  16. Cutting: If filament fibers are desired the process ends here. The filaments are cut down when producing staple fibers


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