I create my own Celtic knots, in the traditional way with 4 cuts. If you have uniform thickness of material that fits the gap, there is no need to cut all the way through the blank. Obviously the chosen material must be reasonably tight fitting & make sure there is ample glue or resin between layers or it will give break out on the lathe.
I use, 0.2mm Aluminium & brass sheet. These can be purchased in sheet form (A4 size) or as a roll typically 20mm wide, which is ideal to cut with strong scissors.
I also use 1mm thick coloured styrene sheets in various colours. 3mm cast acrylic & wooden veneers that come in different colours & thickness.
Here’s a link to a good example of how to do it well. Have fun, Gary
[MEDIA=youtube]wZPm8e-LOHo[/MEDIA]
