Still going through my new soap photos from the other night - more to add later too.
I used my usual tiny frame (a child's 'bubble wand'); the diameter of the circle measures 18mm. There is another shot in the Comments.
The patterns and colours are natural apart from being brightened in Photoshop - and I have removed the outer, ugly, plastic frame too (very little of it was showing up anyway).
For anyone interested in this type of photography, please feel free to join the Soap Films group and add some photos!
You can also find me on: