<h1>DRAWING INSTRUMENTS AND MATERIALS</h1> <p>CONTENT</p> <ol> <li>Definition of Technical Drawing</li> <li>Drawing Instrument and Materials</li> </ol> <p> </p> <h2>Definition of Technical Drawing</h2> <p>Technical drawing is a universal language used for communication among technical people. A good and accurate drawing can only be made through constant practice with the aid of drawing instruments and materials. Technical drawing can also be defined as a language of communication making use of lines, curves, symbols and conventions.</p> <p> </p> <h2>Drawing Instrument and Materials</h2> <p>Drawing instruments and materials for technical drawing are:</p> <ol> <li>Drawing board</li> <li>Tee square</li> <li>Sets squares</li> <li>Protractor</li>

<h1>USES OF DRAWING INSTRUMENTS AND MATERIALS</h1> <p>CONTENT</p> <ol> <li>Uses of Drawing Instruments and Materials</li> </ol> <p> </p> <h2>Uses of Drawing Instruments and Materials</h2> <ol> <li>A <strong>drawing board</strong> is the wooden platform on which the drawing paper is placed before the drawing starts. The two main types are (a) full imperial size which is 812 × 585mm (b) half imperial (585 × 452mm) size.</li> <li><strong>Tee square</strong> is used for drawing horizontal or parallel lines in conjunction with drawing board.</li> <li><strong>Drawing pencils</strong> are of different grades used for general drawing, lettering or freehand sketching and technical or engineering drawing. We have B, 2B, 3B, 4B up to 8B and H, 2H, 3H, 4 H up to 8H pencils.</li>

<h1>BASIC TECHNIQUES FOR HANDLING AND CARING FOR DRAWING INSTRUMENTS AND MATERIALS</h1> <p>CONTENT</p> <p>Basic Techniques of Handling;</p> <ol> <li>Drawing Board</li> <li>Tee-Square</li> <li>Set-Square, Scale Rules, Protractor and French Curves</li> <li>Pair of Compasses or Dividers</li> <li>Other Instruments</li> </ol> <p> </p> <h2>Introduction</h2> <p>We need to take care of our drawing instruments in order to prolong their service life.</p> <h2>Basic Techniques of Handling Drawing Board</h2> <ol> <li>Do not use pins for fastening your paper to the board, use tapes or clips.</li> <li>Do not use blade or knife to cut something on the surface of your drawing board.</li> <li>Always cover the surface with cardboard or thick paper.</li> <li>Keep the drawing board in a safe place when not in use.</li> </ol> <p><img class="size-full wp-image-32504 aligncenter" src="https://classhall.com/wp-content/uploads/2018/06/drawing-board.jpg" alt="Basic Techniques of Handling and Caring for Drawing Instruments and Materials - Drawing board" width="422" height="276" /></p> <h2>Basic Techniques of Handling Tee-Square</h2>

<h1>BASIC BOARD PRACTICE</h1> <p>CONTENT</p> <ol> <li>Setting Drawing Paper on the Board</li> <li>Sharpening of Drawing Pencils to Conical Point and Knife Edge</li> <li>The Instruments Required for Good Board Practice</li> </ol> <p> </p> <h2>Setting Drawing Paper on the Board</h2> <h3>Step 1:</h3> <p>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.</p> <h3>Step 2:</h3> <p>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.</p> <h3>Step 3:</h3> <p>Hold the paper with four pieces of adhesive tape or two metal clips to hold the paper in position at four corners.</p> <h3>Step 4:</h3> <p>Gently slide the tee-square down without moving the paper.</p> <p> </p> <h2>Sharpening of Drawing Pencils to Conical Point and Knife Edge</h2>

<h1>BOARD PRACTICE</h1> <p>CONTENT</p> <ol> <li>Using The Tee And Set Square For Drawing Board</li> <li>Horizontal And Vertical Lines</li> <li>Types of Lines and their Uses</li> </ol> <p> </p> <h2>Using The Tee And Set Square For Drawing Board</h2> <p>This is a practical topic. The teacher should DEMONSTRATE this as much as possible in class for the students</p> <p>The various uses of setsquares are given below:</p>

<h1>BROAD PRACTICE</h1> <p>CONTENT</p> <ol> <li>Positioning and Drawing the Title Block.</li> <li>Freehand Writing of Letters and Numerals.</li> </ol> <p> </p> <h2>Positioning and Drawing the Title Block</h2> <h3>Title Block</h3> <p>The title block gives necessary information about the drawing such as name of designer, school, class, date, scale etc. The title block is usually at the bottom right-hand corner of the drawing paper.</p> <p><img class="size-full wp-image-32536 aligncenter" src="https://classhall.com/wp-content/uploads/2018/06/title-block.jpg" alt="Board practice - Positioning and Drawing the Title Block" width="522" height="227" /></p> <p> </p> <h2>Writing (freehand) Legible Letters and Numerals</h2> <p>Lettering is the art of writing of letters (alphabets) and numbers (figures) in bold form or lower case form on drawing.</p>