This picture shows the circles or end of the power fibers, see how they are compacted to the bottom ( outside or enamel side) of the strip. The top or soft pith is removed in the planning process.
In these pictures I am using a large butchers knife to split the half into quarters
Eventually the strips are small enough to pull them in 1/4 inch or smaller strips by hand. Note the leather glove is protecting my hand from cuts and splinters.
Macsrods Main Webpage or How to make a bamboo fly rod