Printing Craft Practice 2, WASSCE (SC), 2019

Question 3

(a)        Explain the following terms, as applied to lithographic printing:
             (i)         contact printing;
             (ii)        basic exposure.


(b)        State three factors to be considered when drawing the layout plan of a printing job.

Observation

Many of the candidates who attempted this question could not state three factors to be considered when drawing the layout plan of a print job.  In all the candidates’ performance in this question was fairly okay.


The solution is a stated below:


(A)

(i)       Contact printing: This is the process of exposing a sheet of light  sensitive material by passing light through a previously exposed and developed piece of film. It is a method of converting negative to positive film or positive to negative film.

(ii)        Latent Image: This is the appearance  of faint images on the light sensitive material after it has been exposed to light . the image become visible when ever they are developed.

(iii)       Basic Exposure: This is the camera aperture and shutter speed combination that will produce a quality film image of normal line copy with standardized chemical processing.

(B)       Factors to be considered when drawing the layout plan of a printing of a printing job

-           The size of the pages.
-           The number of pages of the job.
-           The machine type size.
-           The size of plate.
-           The methods of imposition required.
-           Type of finishing operations.