Annie, I guess something went wrong with the image, there's nothing to see....
I made a press myself (hey, I'm a Dutchman!) and there are formulas to calculate the pressure:
Distance from henge to the "stamp" is 7cm, from stamp to the end of the lever is 35cm, 35/7=5.
The way I use pulleys multiplies the pressure twice, so 2 x 5 = 10. So 1 lbs will be 10 lbs on the mould (which is NOT the psi!)