Basic board practice

Setting Drawing Paper on the Board

Step 1: The drawing board is conveniently placed on the table with the paper on the board, leaving equal size all rounds, with the Tee-square edge to the left hand side.

Step 2: Place the tee-square on the paper and gently move or slide the tee-square to the top edge of the paper. Set the top edge of the paper parallel to the edge of the tee-square with the stock of the tee-square firmly against the edge of the drawing board on the left-hand side.

Step 3: Hold the paper with four pieces of adhesive tape or two metal clips to hold the paper in position at four corners.

Step 4: Gently slide the tee-square down without moving the paper.

Sharpening of Drawing Pencils to Conical Point and Knife Edge

A well sharpened pencil is very essential to technical drawing. Pencils for lettering and freehand sketching should be sharpened to a ‘conical point’ while those for geometrical or engineering drawing should be sharpened to a ‘chisel point’.

All horizontal lines are drawn with the aid of tee-square. The set-square is used sitting squarely on the tee-square to draw vertical lines.

The Instruments Required for Good Board Practice

The instruments required for good board practice are:

1. Drawing board and Tee-square
2. Set-square (30^o, 60^o, 45^o angles)
3. Compass and Dividers
4. Protractor and French curves
5. Drawing pencils (HB and 2H)
6. Eraser and Drawing paper

EVALUATION

1. Briefly explain how set-square can be used to draw vertical lines.
2. Mention five drawing instruments.