pencil line

Hi there Yesterday, having watched a Soaping101 video, I decide to make a 2 colour soap with a pencil line of mica. I adored the picture and mine looks like it's going to be ok....EXCEPT - I unmoulded it after about 20 hours but as I sliced it with a long sharp knife, the mica was dragged...

Lots of notes because I wanted to document my experiments and learning experiences. This was my 6th batch of soap and my second HP. It was also my first girly soap project adding botanicals. I also wanted to try superfatting after the cook, and putting in a pencil line. Im a newbie who is still...