TennisBalls

I started off the morning making more PVOH (polyvinyl alcohol) with Ryan in the chemistry lab. We made five more of the 6.1 mL which is 45 microns thick. We decided to go just a little more thin and made five of 5.6 mL which is aboiut 42-43 microns thickness. After putting them in the petri dishes, we made little tents out of paper and placed them on top just like last time to keep the dust away and also for it to dry the same time. The only thing left was to think of a way to stretch the films. I went online and read over the packets Tom Smith gave me. Ryan and I decided that the best way to stretch them is with water. When the films are dry, were going to put them in 35 degrees celsius for 15 seconds. After we take them out were going to try to stretch them and see how that goes. After that were staining them with iodine. Were still deciding on whether or not were treating it with boric acid or zinc ion.