WOOD MATERIALS TECHNOLOGY 4 th Edition. Chapter 3 Sketching.

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Presentation transcript:

WOOD MATERIALS TECHNOLOGY 4 th Edition

Chapter 3 Sketching

Sketches Help to explain what an object or idea will look like Communicate ideas Enhance presentations and reports Help to record your work Are useful in exams to support answers

Pencils Different types of pencil are used for lighter and darker lines

Parallel lines Keep parallel lines straight and equidistant to each other Move the page around when sketching if it helps To begin, try using squared grid paper to help sketch lines Practice drawing horizontal and vertical lines and simple shapes

2-dimensional sketching Begin with 2 dimensional shapes such as squares and rectangles Sketch using light lines first and then use heavier lines to finish your drawing Remember – you want a fair sketch, not perfection

Sketching curves Use light crate lines to contain curves, so that you get the proportions right

Examples Line in with light lines Line in the detail lightly Line in with heavy lines to finish Try sketching these examples:

Proportion Proportion is the relationship between two measurements Be aware of the proportions of the item you are sketching Good proportion Poor proportion Notice the relationship between the height ‘D’ and the lengths

Proportion The height of the door is more than twice its width Try sketching these examples:

Sketch these items in 2D (front view)

3-dimensional sketching Start by using isometric grid paper The grid helps you to keep lines parallel

3-dimensional sketching Use light lines to get the correct proportions Lines that are parallel must remain parallel

3-dimensional sketching 3D sketches can be built up by using light lines to make a crate Parallel edges on the object should be sketched as parallel The lines and the detail are then drawn in using a heavier line

3-dimensional curves A lightly drawn box or crate can be helpful when sketching curved objects in 3D

Sketch these objects in 3D Practice by sketching familiar objects without the grid paper

More curves in 3D Biscuit Pencil holder Dowel Stock from a gauge There are many curved objects in the workshop Sketch the objects opposite into your copy or sketch book

Shading Enhance sketches and add tone by shading with a pencil Regular and coloured pencils are effective for graded shading

Shading techniques There are different shading techniques The type of shading used can also suggest a texture

Texture describes how different materials look and feel Texturing should convey a sense of the material: – soft – smooth – coarse – rough – shiny Texture

Adding a grain effect on wood shows the material The use of colour will also improve the sketch Vertical or diagonal lines are used to show glass or shiny surfaces

Colour Colour can bring a sketch alive Degrees of shading with coloured pencils will add to the visual appearance of a sketch Do not overdo the amount of colours used or the heaviness of the colour

Worksheets Use the worksheets to practise your sketching – Draw your sketch in the box beside each model sketch – Begin by completing the line drawing and then use some simple shading and texturing techniques to enhance the final sketch