Basic Considerations in Reproducing Transparencies and Reflection Originals by Direct Screening.

The various direct-screen processes are discussed and basic factors common to all of them are studied, such as the role of the contact screen design, film sensitivity, determination of exposures, masking and tone reproduction. In addition so that these factors can be understood in their proper perspective the variables of the overall direct screen process from original to printed reproduction are considered and compared with the indirect screen process. In addition so that these factors can be understood in their proper perspective the variables of the overall direct screen process from original to printed reproduction are considered and compared with the indirect screen process.