Bichloride of Mercury 120 grains.
Dissolved in hot water 16 oz.
Add to this a strong solution of Iodide of Potassium drop by drop,
until the red precipitate begins to redissolve, then add a few
grains of hyposulphite of Soda, or enough to clear the liquid.
When required for use pour part of this solution into a tray of a
suitable size for the plate, add an equal amount of water, then
immerse the plate and keep the solution in motion. You will
immediately notice a change in the color of the film; take the plate
out, and if it has gained enough strength, wash it and set it up to
dry; if not, give it more.
It is proper to state that this process is more effective if the
plate has been dried after development.
When the plate has been thoroughly fixed and fully washed, it will
intensify by this method, without change of color by transmitted
light, and it will have secured a lovely printing quality rarely
seen even in the most perfect negatives.
This solution may be used until it is exhausted.