E. A. Biermann

• A useful dry plate intensifier
• Bruges
• Copy for reproduction
• Correct exposure and the rational way to use an exposure metre
• Exposure of the autochrome plate
• Half-tone operating simplified
• Plate speeds and gradation in screen negatives
• Regularity in screen negatives
• The dry plate in process work
• The middle tones
• The standardization of three-colour inks
• Three-colour inks and the spectrum