My second experiment in radial perpendicular pleating was based on a 30cm square of crispy Kraft paper, a regular 32 grid and a random number sequence:

I decided it would be interesting to see what happens when you use random numbers to control the collapse sequence for a micropleat corrugation based on a regular 32 grid of mountain folds. I typed “100 random numbers between 1 and 3” in google and blow me down but there was a website for that: https://numbergenerator.org/100randomnumbersbetween1and3

Each time you open that you get a new sequence. Mine was “3 2 3 1 2 3 2 2 2 1 2 2 1 2 2 3 3 3 2 1 1 3 2 3 1 1 1 3 3 1 1 3 1 1 2 1 2 3 3 1 2 3 3 1 3 1 2 1 3 2 2 1 2 3 3 1 1 1 1 1 1 1 2 1 1 3 1 2 1 1 1 2 1 2 1 1 1 2 2 1 3 3 3 2 3 1 2 1 1 3 1 3 1 3 2 3 1 3 1 2”.

Starting on the pleat just down from the centre line (in retrospect I wish I had started with the centre line, but… meh), I used the first 3 mountains and laid in micropleats (partial 128ths) across the sheet as uniformly as my fat clumsy, nerve damaged fingers would let me. I then rotated the paper 90 degrees clockwise, crossed out the first number and used the second number to determine how many cross-sheet micropleats to lay in. Rinse and repeat to the edge of the sheet.

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