Final answer:
The answer for filling in the blank for testing a honed razor's sharpness has not been provided. The hints refer to a procedure involving static electricity, which is not directly related to such a test.
Step-by-step explanation:
The question refers to a method for testing the sharpness of a honed razor. The procedure for this test, however, appears to have been omitted or might not be related to the suggested procedure using a plastic object and water.
Normally, to test a razor's sharpness one might gently pass it over the surface of something like a hair or a thumbnail. Although the provided instructions hint at a demonstration of static electricity, it does not describe a conventional method for razor sharpness testing. Given that the complete conventional procedure for testing razor sharpness is not included, we cannot provide an accurate and detailed answer for the space left blank in the question.