Technical Drawings in Interiors

TECHNICAL DRAWINGS IN INTERIORS 4(1+3)

Lesson 1: Drafting Equipment – Tools And Materials

Erasers/ erasing shield/ drafting powder:

Erasing pencil can leave a mess of eraser particles on your work. It is not wise to use hands to brush off the paper after using an eraser as it results in a smudged drawing - unacceptable to the client, and difficult to read when reproduced. Greasy marks of fingertips and missed fragments of eraser waste, interfere with smooth drawing. It is a good idea to begin with a clean eraser. To clean excess graphite from a white plastic or gum eraser, simply rub it briskly on a piece of coarse scrap paper. If the eraser is very greasy and dirty, one can use a craft knife to trim away the ends.
To clean a kneadable eraser, you need to stretch and fold the eraser like putty, so that a fresh surface is created. After a while, the eraser becomes saturated and you will need to replace it. Another aid in erasing unwanted lines or areas is the erasing shield which is a thin metal or plastic sheet that resembles a template.(Figure – 14) Its function is to allow the drafter to erase only that part of the drawing that is exposed and protect everything around it. The thinner the material the better, which makes metal erasing shields superior to plastic.

Erasing shield		Erasing Brush

Figure – 14 Erasing accessories