Rosin is a solid form of resin obtained from pines and some other plants, mostly conifers, produced by heating fresh liquid res Specifications: ItemsXWWWGNMKAppearanceTransparentColorslight yellowlight yelllowyellow deepyellowyellow brownyellow redSoftening point(R.&B.), 75Min74MinAcid number (mgKOH/g)166Min165Min164MinUnsaponifiable matter5%Max5%Max6%MaxInsoluble matter in alcohol0.03%Max0.03% ...