Update README.md

1f999b3d · Camron Blackburn · d48caaab · 1f999b3d
Commit 1f999b3d authored Apr 07, 2020 by Camron Blackburn
--- a/README.md
+++ b/README.md
@@ -5,3 +5,7 @@ Masks chatacterized: \
 [Gerson N95](./Gerson_N95/readme.md) \
 [Kimberly-Clark 47117](./KC_47117/readme.md)

+
+## Measurement methods
+- filter material width: micrometer, squeezed until width is no longer changing 
+- fiber thickness: SEM, data measurement 
\ No newline at end of file