JSS1 Basic Technology Lesson Note on Basic Board Practice

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TOPIC: BOARD PRACTICE

Sub- Topic

1. Basic board practice; setting drawing paper on the board
2. Sharpening pencil to conical point and knife edge.

Sub-Topic II: 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 cups to hold the paper in position at four corners.

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

Sub-Topic III: 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.

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