Drawings for Reproduction
Designs in some instances are in the form of perspective sketches, when it is desirable to convey an idea of their final appearance, but as a rule they are expressed as working drawings. This is imperative when the final production is the result of some mechanical production, as in book decoration and advertisement either black and white or in colour. Drawings for these are generally made larger and reduced to the required size by photography, and the blocks for printing made from the photograph.
There is no fixed rule as to size of drawing or reduction, but if the designs are drawn for one-third reduction there will be no material alteration in values when produced. But as the reduction is increased there is a proportionate risk in alteration of values. It is desirable to bear the proposed reduction in mind and to work more boldly or with thicker lines, otherwise the final effect may be thin and weak. In pen drawing, the lines should be clear and distinct whatever their thickness.
For designs in black and white, hot-pressed paper, Bristol board or smooth card are most suitable. The ink should be waterproof, as, if necessary, corrections with Chinese white can be more neatly made. Fine pens, except for very minute work, are not desirable, a Gillott’s ladies’ fine writing nib yielding as fine a line as is ordinarily required. For some classes of work a brush will be found more suitable, but care should be taken that all lines—whether thick or thin—are equally black.
Designs in colour for illustration or advertisement, which are to be reproduced by lithography or the three-colour process, can be on card or Whatman paper. The colours employed being transparent or opaque, whichever is more suitable to working and effect. Larger designs for advertisement, such as posters, are usually painted in tempera or opaque colour, and these should be applied as far as possible edge to edge, overpainting being avoided.