Closed-open sink-fold is a mixed folding of both closed sink-fold and open sink-fold. Here closed sink-fold is applied to the left side while open sink-fold for the right side. Before learning this folding technique, try to learn what both closed sink-fold and open sink-fold are. In this tutorial, I will start with both square base and balloon base to what closed-open sink-fold does to any model.
00A.
The "closed-open sink-fold" symbol can be shown as "closed sink-fold" line on the left while "open sink-fold" line on the right,
Here we are applying closed-open sink-fold to both a balloon and a square base.
00B.
If we apply "closed-open sink-fold", then both balloon and square bases will be turn into one without head.
In the next page, the instruction will show how to apply the closed-open sink-fold in detail.
