Items

Photo First Grade

Photo
Second Grade

Medical Grade

Main content

99.5% min

99.5% min

99.0% min

Loss on drying

0.5% max

0.5% max

0.5% max

Water Insoluable

0.005% max

0.01% max

—

Chloride

0.2% max

0.2% max

0.5% max

Iodide

0.001%max

—

—

Sulphate

0.005%max

0.005% max

0.01% max

PH Value(5%)

4.5—6.0

4.5—6.0

4.5—6.0

As

—

—

≤0.0004％

Pb

0.2ppm max

5ppm max

5ppm max

Fe

0.5ppm max

1ppm max

—

Cu

0.5ppm max

1.0ppm max

—

Bi

0.2ppm max

0.5ppm max

—

Peroxide solution penetrability(250g/l)

93～100
(410nm)

85～100(410nm)

—

Transparency  test

Qualified

Qualified

—

Peroxide solution chromaticity(250g/l)

(15.0 Black once)max

—

—

Packing

25kg/bag