Additive mixture ofcolortrichroism is red,green and blue,subtractive mixture,as its complementary colors,is cyan,ma genta and yellow,thatis the dyestuff trichroism.
Three strategies (additive, chiral auxiliary or chiral reagent) were developed to improve the diastereoselectivity or enantioselectivity of the ylide cyclopropanation reactions.
"Jinbiao"CMC is the widely used additive, in paper industry because it mainly has membrane and oil-resislance capability as water soluble superpolymer.
Besides that, prop-1-ene-1,3-sultone is a kind of electrolyte additive, which can effectively restrain ion battery from expanding under the condition of high temperature.