Since I have sort of changed my idea and am now using light to aid the transparency of my images.. I decided to retry the tracing paper.
I wondered if perhaps when held to the light it would become transparent.
Here is the test:
It is slightly more see-through against the light, but still not enough for how I want it to be.
The colour is still there, sometimes when light is put behind an image the colour can fade, but in this instance it doesn't which is nice.
Unfortunately though I don't think it will work for this project.