wrinkles, but not so many

The October 12th blade has started to show some small wrinkles, but not so bad as before.
Maybe the foam was not well enough mixed? I mix it with a pencil in a cup for 20 seconds.
Maybe there was not enough foam, therefore not enough pressure.

I will mix more foam next time and release from mould after 3 days.
I want to see the weight lift a little, so I know there was enough pressure.