Emulsions

Photography
6 ECTS; 3º Ano, 2º Semestre, 30,0 T + 45,0 TP + 5,0 OT

Lecturer
- Tiago Alexandre Figueiredo Cacheiro
- Alexandre José de Magalhães Figueiredo

Prerequisites
Not applicable.

Objectives
In the course of the semester we study photographic processes that use bromide or silver chloride emulsion in black and white. Both direct darkening emulsions and developing emulsions for application on paper or photographic film are addressed. From a historical perspective, we will study the discovery and evolution of emulsions, as well as the improvements in the first 10 years of use. Reference will be made to the production processes of an emulsion, both industrially and on a small scale, in a photographic laboratory. We will study in detail how the choice of chemicals, the different production technologies and the variation of parameters can influence the characteristics of the manufactured emulsion. The program also includes the study of the theories of imaging and revelation, which made it possible to understand these phenomena. Special effects on emulsions and infrared emulsions will also be addressed from a practical perspective. Practical exercises will be performed with commercially produced emulsion and with various emulsions produced entirely by the students, in school, from the rudimentary materials and equipment. Infrared emulsions will also be tried.

Program
Experience with industrial photographic emulsion.
Experiment with infrared sensitive photographic film.
Preparation and test of direct browning emulsion.
Preparation and testing of emulsion washed for development.
Practice of printing on various supports (wood, textiles, paper, etc.), with the "artisanal" development emulsion produced in the context of a theoretical-practical class or using commercial emulsion.
Practice of producing a glass negative with the "artisanal" developing emulsion produced in the context of a theoretical-practical class or using commercial emulsion).
Last practical classes - Final project of curricular unit.

Evaluation Methodology
The assessment is continuous and consists of:

• Attendance, Attendance and Attendance - 5%
• 5 exercises practical - 25%
• 1 written assessment test - 20%
• 1 research paper - 15%
• Final project - 35%

Practice sheets and / or reports must be submitted no later than one week after the exercise in question on the risk of 1 penalty for each day of delay.

All assessment elements must be presented and delivered by the last class of the contact period.

However, if the student needs more time to complete the final project, the presentation may be postponed to the exam season without prejudice to the assessment. The only component that can be evaluated during exam, feature and special times is the final design.

Students who often do not obtain a final grade equal to or higher than 8/20 are excluded from subsequent seasons.

Bibliography
- White, L. (1995). Infrared Photography Handbook. New York: Amherst Media Inc.
- Wall, E. (1929). Photographic Emultions, their preparation and coating on glass, celluloid and paper, experimentally and on large scale. Boston: American Photographic Publishing Co.
- Zakia, R. e Current, I. e Compton, J. e Stroebel, L. (2000). Photographic Materials and Processes. London: Focal Press
- Jones, S. e Reed, M. (2001). Silver Gelatin, a User's Guide to Liquid Photographic Emultion. London: Argentum, Aurum Press Limited

Method of interaction
Lectures exploring the theoretical contents and laboratory classes (practice and experimentation).

Software used in class
Adobe Photoshop
Silverfast