Enlarging Patterns

To enlarge a picture make a photocopy of the original, then draw a grid on the photocopy. Draw a grid with larger squares on the material or on a large sheet of paper or cardboard if more than one pattern will be needed. Number the corresponding squares on the photocopy and the enlarged grid. Copy the image square by square to the enlarged grid. I find it easier to draw any straight lines first, then connect them with the curved lines.

Grid Template

Paint a sheet of pegboard white, with different colored markers circle the holes to indicate the various sizes.

Lay this on top of material and mark through the holes to indicate the corners of the grid squares.

Photcopy Method

To enlarge an image that is larger than the paper, copy the image to the largest size that will fit on the paper, draw a grid on this copy, fold copy in two lengthwise making one part larger than the other, fold the other way making one part larger. Copy this to required size, repeat for the other three quadrants, match grid lines and tape the four copies together.

Symetrical Shapes

It is only necessary to draw one half of the pattern, the second half can be rendered in three ways:

Method 1

Draw design on folded paper with fold on center line, cut out and unfold.

Method 2

Cut out one half of design, trace around it, flip and trace second half.

Method 3

Draw first half, trace over design with tracing paper, using a pencil with a soft lead shade outline, turn paper over and align with first half. With a pencil with a hard lead trace around design, the soft lead will act as carbon paper and transfer the design.

Ogees

One cut creates two equal pieces.

Proportions

To enlarge or reduce an object draw a diagonal line from corner to corner, if enlarging extend line outside top corner. Extend or shorten base to desired dimension, a line extended from this point to diagonal line indicates the height.

Drawing Large Curves

Method 2 Mark the center of the top and the two lower points of the curve.
Drive nails in at the marks, lay a thin batten around the nails and draw the curve.

Sources for Patterns

Other than the obvious, the library and the internet, there are other sources for unique patterns. Childrens colouring books have a lot of good designs for animals and people, seasonal objects can be adapted from cookie cutter shapes. Computer clip art is an endless resource and can be sized easily in a simple graphics program.