The colorimetric methods involve the bleaching of a preformed color by the fluoride ion. 比色法涉及氟離子對預先形成的顏色的消色作用。
Gardner chromaticity value and color grade of solid gum rosin was determined with a Lovibond automatic colorimeter. 采用羅維邦自動(dòng)比色儀可以直接測定固體脂松香的加納色度值和顏色級別。