Quality Index of Gum Rosin

Item	X	WW	WG	N	M	K
Appearance	transparent
Color	slight yellow	yellowish	yellow	deepyellow	yellowish-brown	yellowish -red
	Conform to Color Requirements of STD Glass for Rosin
Softening point(Ring-and-ball method) ℃≥	76.0		75.0		74.0
Acid value (mgKOH/g)≤	165.0		164.0		163.0
Ethanol insolubles %≤	0.030		0.030		0.040
Non-saponifiable matter %≤	8.0		8.0		9.0
Ash content %≤	0.020		0.030		0.040