This experiment used salt as the base medium to produce uric acid crystal. The process contained four steps, first, submerge the foams, which the poriferous structure can help it absorbing the liquid and fixing the crystallised salt,in saturated salt water. Then expose the salted foams on sunlight in order to evaporate the moisture. Thirdly,re-immerse the foam in urine liquid to use the crystallised salt as the medium and the base for uric acid crystallisation to do the ion exchange between urine and sodium, finally evaporate the residual liquid again.
Experiments Conclusion:the grew piece shows itmore like urine deposit rather than crystals and the amount of deposit was few.