JOURNAL OF FHE SOCIETY OF COSMETIC CHEMISTS Figure 3. Photographs of hmnidity chamber containing cm'ls Top. Initial appearance of curls Bottom. Cm'ls after exposure to high humidity tervals for a period of 3 hours. The average curl drop or, as we later found more meaningful, the average per cent curl retention, for curls at each time interval, can be used for comparison or as a measure of hair spray effectiveness. The per cent curl retention is calculated using the formula:
NEW APPROACHES TO HAIR SPRAY EVALUATION 625 .',,•! %. .... .:: •? •...• ..... --•, s • • ..... •,•. • • - ß. ß . ::(...•,........s/.• • .• . '. ß ....... .. :. • ............... .: •½• • •½, • /.. ,•,.•,.. ¾¾•F •.• •.. ß ' '.v:.. '. :. ß • .}:' .-,..•x• . •* .::• ..•.... ..,.. .:•, •4 .......... .. : :"?',: ....:,***..e•a• :,,::,.,xx ......... ,•' :'.:::..:•.• . ".:?:.',• ...... %, ...:."_'.
Previous Page Next Page 
Purchased for the exclusive use of nofirst nolast (unknown)
From: SCC Media Library & Resource Center (library.scconline.org)