Puncture test technique

Gangstad and Snell (1943) have made detailed use of regression techniques in a study of the texture of sweet com. Three standard varieties, one experimental variety, and the parent inbreds were tested with a puncture meter to measure resistance (in grams) in relation to dry weight and maturity (days after pollination). Dry weight is a reliable index of maturity for sweet com, and on this basis it was postulated that puncture resistance should be a valid measure of some function of dry weight and days after pollination (maturity). 

Defects in condoms were examined, characterised and compared with defects introduced using various techniques. Eighty-five percent of the condom defects examined were classified as either a hole (void in material) or a slit (puncture). Laser drilling and puncturing with a 160 micrometre diameter acupuncture needle artificially introduced similar types of defects. Microscopic examination of the created defects, before and after FDA water leak testing. 

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