It is the basic form of the second base. It is made from Base No.1.
It is the basic form of the second base. It is made from BaseNo.3-2.
The four petals are closed, looking interesting.
This series has the same area of the petal as a work of the Base No.8 series. Therefore there are some similar shapes in works. Its folding is more difficult than Base No.8 series a little.