Black and White Emulsion Types
The emulsion contains light sensitive silver halide crystals suspended in gelatin. Black-and-white papers typically use relatively insensitive emulsions composed of silver bromide, silver chloride or a combination of both. The silver halide used affects the paper's sensitivity and the image tone of the resulting print.
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“Thee for my recitative,
Thee in the driving storm even as now, the snow, the winter-day
declining,
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convulsive,
Thy black cylindric body, golden brass and silvery steel,”
—Walt Whitman (1819–1892)
“By straightening out and lifting a forefinger,
He pointed with his hand from where it lay
Like a white crumpled spider on his knee:”
—Robert Frost (1874–1963)
“If there is nothing new on the earth, still the traveler always has a resource in the skies. They are constantly turning a new page to view. The wind sets the types on this blue ground, and the inquiring may always read a new truth there.”
—Henry David Thoreau (1817–1862)