This may be accomplished by the use of toning baths of ferridcyanide or ferrocyanide, or other metal cyanogen salts, etc.
In the first process, the paper being charged with the uranic salt and exposed to the solar influence under the negative to be copied, is washed with a solution of the ferridcyanide or red prussiate of potash.
Next, expose beneath a negative for eight or ten minutes, then wash and immerse in a bath of Ferridcyanide of potash 30 grains.
Float the paper for a minute in a solution of Ferridcyanide of potash 1 ounce.
Morphine possesses strong reducing properties; a little solid morphine dissolved in a solution of ferric chloride gives a Prussian blue precipitate when ferridcyanide solution is added.
Hence, the ferridcyanide of potassium is as excellent a test for protoxide of iron as the yellow ferrocyanide is for the sesquioxide.
Ferridcyanide of Potassium changes in the system into Ferrocyanide.
All the known soluble compounds of Iron, except the Ferrocyanide and Ferridcyanide of Potassium, possess this Restorative power.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "ferridcyanide" in a variety of sentences. We hope that you will now be able to make sentences using this word.
