In all cases the plate should first be wet with water.
"American Handbook of the Daguerrotype" by Samuel D. Humphrey
I'm going to try a wet plate now, and I think it will work.
"Tom Swift and his Photo Telephone" by Victor Appleton
I am in a position to pronounce that wet plates and dishes are far more difficult to keep hold of.
"Station Amusements" by Lady Barker
The object, as we all know, in a wet-plate negative is to get good printing density without destruction of half-tone.
"Scientific American Supplement, No. 288" by Various
When the object is raised a little above the brass plate, a keen edged razor, thoroughly wet, is pushed over the hole, cutting the object.
"Scientific American Supplement, No. 492, June 6, 1885" by Various
Wet a dinner plate with cold water and leave it wet.
"The Story of Crisco" by Marion Harris Neil
The tough iron plates at the bow are rent and torn and twisted like wet paper.
"Lippincott's Magazine Of Popular Literature And Science, No. 23, February, 1873, Vol. XI. No. 23." by Various
Six plate-holders were so wet that I could not even draw the shutters out, but luckily I had more elsewhere.
"Unknown Mexico, Volume 1 (of 2)" by Carl Lumholtz
Then dip the shell into the water, and put it on the warm, wet plate.
"Friends in Feathers and Fur, and Other Neighbors" by James Johonnot
The girl's hands were wet and stiff with cold, but she quietly laid another plate upon the table before she answered him.
"The Greater Power" by Harold Bindloss
Matches, salt and camera plates were ruined by wetting, so I had to contrive a waterproof carrier for them.
"A Mountain Boyhood" by Joe Mills
Soak the plate for a few minutes in clear water, till the film is thoroughly wet.
"Harper's Round Table, August 13, 1895" by Various
Wet a plate and press down on the top of each mold and place a weight on top of that.
"Civic League Cook Book" by Anonymous
To overcome this the first plate is heated by wet steam.
"Soap-Making Manual" by E. G. Thomssen
Wet-plate photography is well represented, both in landscape, portraiture, and composition.
"The Evolution of Photography" by John Werge
He saw her wet plates shine as she lifted them from the sea and the groups of passengers about her rail.
"Kit Musgrave's Luck" by Harold Bindloss
I took a sponge and wetted them, and put them one by one on the plate in order for printing them.
"Harper's New Monthly Magazine, No. VI, November 1850, Vol. I" by Various
A piece of leather is then wetted and placed under the plate and the whole heavily pressed.
"The Decoration of Leather" by Georges de Récy
Slight blemishes, white specks, etc., can best be corrected by gentle touching-up with crayon during the proof-printing on the wet plate.
"The Invention of Lithography" by Alois Senefelder
The metal plates sagged like wet paper, dropped limply.
"The Metal Moon" by Everett C. Smith