This is the second in a series of blog posts exploring simple Celtic knot borders. “4 by” refers to the fact that these knots are four sections wide, and an increasing number of sections long.
Each example will display a line drawing of the border, and a colored version. The colored version features three basic shapes (corners with tails, curves, and flattened “S”s) with a bit of space added, and the colors illustrate how many strands are in each knot.
4 by 4 border: four tailed corners, four curves, four “S”s; two colors.
4 by 5 border: four tailed corners, four curves, six “S”s; two colors.
4 by 6 border: four tailed corners, four curves, eight “S”s; two colors.
4 by 7 border: four tailed corners, four curves, ten “S”s; two colors.
Did you notice anything about these examples?
They all produce two-color knots; the knots are actually two separate strands, woven together. When both width and length are even-numbered, they produce one knot containing two diagonal corners, and one knot containing the other two diagonal corners, woven together. When one dimension is odd-numbered and the other dimension is even-numbered, they produce two mirror-image knots containing two adjacent corners, woven together.
This is probably the last post in this series because all borders will fall within one of three categories: both width and length even-numbered; both width and length odd-numbered; or, one dimension even-numbered and one dimension odd-numbered.
I hope you’ve enjoyed this series of blog posts. Please leave a comment.