The Keepers of Light: A History & Working Guide to Early Photographic Processes |
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Page 77
... posure . The print is developed in potassium ox . alate , which dissolves the ferrous salts and causes the platinum to become reduced to the metallic state . The image appears almost immediately . The light - sensitive ferric salts ...
... posure . The print is developed in potassium ox . alate , which dissolves the ferrous salts and causes the platinum to become reduced to the metallic state . The image appears almost immediately . The light - sensitive ferric salts ...
Page 117
... posure . The relationship between density and ex- posure is usually represented by a graph known as a characteristic curve , as in Figure 102. Density 2.10 1.80 is plotted along the vertical axis of the graph , ex- posure along the ...
... posure . The relationship between density and ex- posure is usually represented by a graph known as a characteristic curve , as in Figure 102. Density 2.10 1.80 is plotted along the vertical axis of the graph , ex- posure along the ...
Page 149
... posure guide . Write down on a slip of paper the density of the step on the No. 2 Step Tablet from which this tone was printed . Use the table in Figure 108 to find the density of the step , if your own tablet has not been calibrated ...
... posure guide . Write down on a slip of paper the density of the step on the No. 2 Step Tablet from which this tone was printed . Use the table in Figure 108 to find the density of the step , if your own tablet has not been calibrated ...
Contents
The First Processes | 17 |
Artistic Preferences | 31 |
The Syntax Takes Shape | 41 |
Copyright | |
27 other sections not shown
Common terms and phrases
acid albumen Alfred Stieglitz areas artistic bath Baumé bromide print bromoil brush calotype camera carbon print carbon tissue carbro cess chemical chloride collodion collotype color contrast copper cyan cyanotype Daguerre daguerreotype Demachy density range detail dissolved Distilled water dried edge Emerson engraving etching exposed exposure ferric ferric chloride fibers Figure film filter fixer gelatin grams gravure gum print hardened highlights insoluble kallitype Kodak light magenta matrix method minutes mold necessary negative Niépce original painting Peter Henry Emerson Photo-Secession photographic Photogravure Pictorialist pigment plate Platinotype platinum prints posure potassium dichromate printmaking produce pulp remove reproduction result rinse salted paper Scientific sensitive coating shadows sheet of glass side silver nitrate soaking sodium sodium thiosulfate soluble solution squeegee stain Step Tablet surface syntactical syntax Talbot technique temperature thiosulfate three-color tion tonal scale tones transfer paper tray wash Woodburytype yellow York