zinc oxide（direct process）
index(meet standard gb/t3494-1996 )
index item
for plasticappication
for paint application
zno-x1
zno-x2
zno-t1
zno-t2
zno-t3
zinc oxide %≥
99.5
99.0
99.5
99.0
98.0
lead oxide (pbo) %≤
0.12
0.20
—
—
—
cadmium oxide (cdo) %≤
0.02
0.05
—
—
—
copper oxide(cuo) %≤
0.006
—
—
—
—
mangaese(mn) %≤
0.0002
—
—
—
—
metallic metals(as zn)
none
none
none
—
—
insolubles in hcl solution %≤
0.03
0.04
—
—
—
losses on ignition %≤
0.4
0.6
0.4
0.6
—
soluble matters in water %≤
0.4
0.6
0.4
0.6
0.8
screening residues(45祄 wet screen)%≤
0.28
0.32
0.28
0.32
0.35
105癈soluble matter in water %≤
0.4
0.4
0.4
0.4
0.4
hiding power g/m2≤
—
—
150
150
150
oil absorption g/100g ≤
—
—
18
20
20
colour killing %≥
—
—
100
95
95
colour (compared with standardspecimen)
—
—
suit standar specimen
notes:special re should bedecided through negotiation between the seller and the buyer