Emulsions

Photography

6 ECTS; 3º Ano, 1º Semestre, 45,0 PL + 30,0 TP + 5,0 OT

Lecturer
- Marta Sicurella
- Alexandre José de Magalhães Figueiredo

Prerequisites
NA

Objectives
a) Study of photographic processes using black and white bromide or silver chloride emulsion.
b) Production processes of an emulsion, both industrial and small scale, in a photographic laboratory.
c) Studies of how the choice of chemicals, the different production technologies and the variation of parameters can influence the characteristics of the emulsion manufactured.
d) Study of the theories of latent image and revelation
e) Special effects on emulsions and infrared emulsions from a practical perspective.
f) Realization of practical exercises with commercially produced emulsion and with several emulsions produced entirely by the students, at school, from rudimentary materials and equipment.

Program
1) Experience with infrared sensitive photographic film.
2) Experience with industrial photographic emulsion:
a) Practice of printing on paper
b) Practice of printing on various media (wood, textiles, paper, etc.), with the "handcrafted" revelation emulsion produced in the context of theoretical-practical classes or using commercial emulsion.
3) Preparation and testing of washed emulsion for revelation:
a) Practice of producing a negative in glass, with the "handcrafted" revelation emulsion produced in the context of a theoretical-practical class or with recourse to commercial emulsion.
b) Capture in large format chamber and positivation in RC paper.

Last practical classes - Realization of the final project of the UC.

Evaluation Methodology
The evaluation is continuous and consists:

- Attendance, Participation and Attendance - 5%
- 3 practical exercises - 30%
- 1 written evaluation test - 25%
- Final project - 40%

The sheets and/or reports of the practical exercises have to be delivered up to one week after the exercise in question about the risk of suffering a penalty of 1 amount for each day of delay.

All the elements of evaluation must be presented and delivered until the last lesson of the contact period.

However, if the student needs more time for the execution of the final project, the presentation can be postponed to the exam period without prejudice to the evaluation. Since the only component that can be evaluated in the exam times, resource and special is the final project.

Students who do not obtain a final grade of 8/20 or higher are excluded from the subsequent seasons.
Students who in frequency have obtained scores from 8.1 to 9.4/20 will be proposed to the exam. Together with the teacher they will draw up a recovery plan (improvement of practice exercises, written test or final project). The same strategy will be adopted in subsequent seasons (resource season, special/finalist season).

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
A - Method of expositive interaction, theoretical classes taught using the projection interface
B - Laboratory practice where the knowledge acquired in the context of theoretical classes is experimented and applied.

Software used in class
Adobe Photoshop
Silverfast