Make two Stock Solutions as follows : -

No. I.

Potassium ferricyanide

400 grains.

Potassium bromide

600 ,,

Water ..........

10 ounces.

No. 2.

Sodium sulphide, pure

1 oz.

Water ..........

10 ounces.

Take of No. 1 Solution 1 ounce to water 10 ounces and immerse the print till it is bleached, then rinse in water and immerse 111

No. 2.

Solution.................

1/2 ounce.

Water.....................

10 ounces.

In this the print gradually changes to a fine sepia colour. When the action is complete well wash in several changes of water.

Printed by Percy Lund, Humphries & Co., Ltd., Bradford and London. 14468