My last photos of my paper layout were hard to see, so I shot them again and have also included a practice piece to show what I am trying to accomplish. The triangles that are removed have no depth at the base of the triangle and the chip is removed down 1/8 at the apex.
I have done a little chip carving with a knife into soft material before. For this project however, since it is white oak and I wanted to make sure my lines were straight, i decided to chip carve with a pair of bench chisels. I used a wide chisel that just incises a shallow line across two of the squares. I was hoping that this would give a nice straight line on the diagonal and it worked quite well.
To actually carve out the triangle, i placed a 3/4 chisel in the incision and using a mallet drove straight down to the 1/8 depth at the apex and nothing at the base. I chiseled both sides and kept the chisel bevel to the waste side.
After the two sides are chiseled, I then gently push the chisel from the bottom with the chisel parallel to one of the triangle sides. I then repeat for the other side and clean up as needed.
1 1/4 hour later I had done one row of triangles. Only fifteen more to go and hopefully I will get faster, but I also dont want to make mistakes so I am taking my time. The photo doesnt show the 1/8 depth very well, but the chips are coming out nicely. After all the paper is removed I will go over for a final cleanup.