Page 14 - Lindsey Philpott "The Ultimate Book of Decorative Knots"
P. 14

8  THE  ULTIMATE  book  of  dEcorATIvE  knoTs




                   yarns. Those yarns are subsequently twisted in the
                   opposite direction into strands. Then the strands
                   are twisted together, again in the opposite direction,
                   into lines or cords. The final twist may be described
                   as left laid (known in the trade as S-laid because its
                   strands appear to follow the stroke of the letter S) or
                   they may be right-laid, which is the most common
                   form (also known as Z-laid). You should note that
                   cords may be simply described on the store shelves
                   as twisted; you should examine this yourself to
                   determine the way in which they were constructed.
                      When a cord is described as braided, or as ‘braid
                   on braid’ (or even as single or double braid), again
                   this refers to the form of construction. Braided   for decorative work. Leather is the hide of an
                   lines and cords are made with twisted fibres that   animal, such as a cow, deer, or kangaroo (serious
                   have been paired, tripled, or quadrupled in groups   leatherworkers prefer kangaroo leather, which ranks
                   as yarns, after which the yarns are braided over and   first in workability and durability). The gauchos of
                   under each other in two directions, one group to   South America and the cowboys of the American
                   the left, and one group to the right. The expression   West used rawhide instead of the tanned hide
                   ‘braid on braid’ refers to the fact that a braid lies   to produce some very strong leathers. However,
                   inside the hollow core of another braided line. A   rawhide requires special lacquer or wax finishing to
                   fibrillated cord is made from shorter fibres that   preserve the leather because, if it is water-soaked,
                   have been artificially created out of a normally   it will soften and deteriorate quickly. The thickness
                   continuous piece of extruded polymer. A similar    of the hide will determine where it is used and how
                   description, spun cord, is used for lines made from   much wear it can take. When tanned, leather is both
                   normally continuous extrusions that have been      pliable and strong. It can even be carved, which is a
                   made into shorter fibre lengths for spinning into   separate subject area and one that we do not cover in
                   cord. Fibrillated and spun cords have a softer feel to   this book. After constructing a decorative knot with
                   the hand.                                          tanned leather one should treat it with neatsfoot oil
                      Let’s take a look at the types of materials with   for conditioning, and mink oil for waterproofing.
                   which you will be making your decorative knots!    Varnish or other hard finishes are usually not
                                                                      appropriate for tanned leatherwork. Seen above
                   Leather                                            are photographs of leather strips in suede, sold in
                   Leather, specifically split leather hide, is one of   craft stores for beading, but eminently suitable for
                   the oldest cords used for practical lashings and   beginning decorative knotting.

                   From left to right: Single braid in AmSteel Blue UHMWPE (a type of polythene), Manila Z-laid line
                   (right-laid), Hemp S-laid line (left-laid) and double braid on the right in polypropylene. Notice the
                   over-two under-two structure of the yarns.
   9   10   11   12   13   14   15   16   17   18   19