Working with anthotypes

According to my gourp's likeness of green and red, we designed an experiment by using spinach, raspberry water and alcohol as our "magic juice", as following, there are six types:

*raspberry x 2 : alcohol x 1
*raspberry x 1 : water x 1
*spinach x 2 : alcohol x 1
*spinach x 1 : water x 1
*(raspberry + spinach) x 2 : alcohol x 1
*(raspberry + spinach) x 1 : water x 1

we applied each of them 3 coats vertically and horizontally on water color paper then cut some shapes to cover ther paper. Next, was hoping for sunny days in Rochester and waiting for the exciting results :)

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Sadly, after two weeks, there is no distinct change on the paper, my "magic juice"(raspberry x 1 : water x1) dosen't work :( I assume the reason maybe the coat is not so even.