Lesson video

Hello there, and thank you for joining me for our lesson today.

Our lesson is "Mark out and prepare materials - textiles," and this is from the "Iterative design - Nature" unit.

The outcome: I can mark out materials accurately to manufacture my design.

We have three keywords.

Marking out, which is the process of measuring and drawing on a material before manufacture.

Accurate, which is to be correct and precise.

And measuring, determining the size of an object using a tool.

There are two parts to our lesson today, prepare for marking out and marking out a design.

Let's begin.

Marking out is measuring and drawing on a material before manufacture.

This is a critical task and should be carefully and accurately completed.

It helps to prevent material waste, ensure a good fit for assembly, save time, cost, and reduce errors.

Let's have a check for understanding.

When manufacturing, marking out accurately, A, prevents material waste, B, makes the design better, or C, ensures a good fit for assembly.

Pause the video and have a go.

Great.

Let's check.

That's right, it's both A and C.

Marking out accurately prevents material waste and ensures a good fit for assembly.

Well done.

A variety of tools are required when working with different types of materials, including when marking out materials.

Different materials require specific marking tools.

Using the wrong tool, such as a pencil on metal, can result in unclear or inaccurate marks.

Recalling measuring skills using millimetres will support successful marking out and the preparation of materials.

Equipment needed for marking out on textiles.

A pencil, a metal rule, tailor's chalk, and a tailor's tape measure.

Here we have a check for understanding.

Name these pieces of equipment.

Pause the video and have a go.

Wonderful.

Let's check.

That's right, this is tailor's chalk and a tailor's tape measure.

Well done.

Equipment to avoid.

Plastic rulers, the measurement don't start at the ruler's edge, leading to inaccuracies when measuring.

And thick nibbled pens, they produce a thick line that does not support accurate measuring and cutting.

When marking out materials, you should try to mark out shapes from the edges or as close to the edges as possible.

Why do you think that is? That's right, this avoids waste and can make cutting less difficult.

Drawing straight lines on textiles.

Lay out the fabric on a large flat surface.

Use the tailor's tape measure to mark the measurements with tailor's chalk.

Use a long straight edge, a metre rule is ideal, to mark the straight line.

Often, we don't mark out directly onto fabric but we use a pattern piece.

Here we can see a picture of a paper pattern piece.

This is drawn accurately on thin pattern paper and then pinned to the fabric and used as a template.

This prevents damaging the fabric with chalk, pencil, or pen marks.

When marking out on timber, it is important to check the edges are straight and then use a pencil, ruler, and a try square.

Use a try square to start any straight lines to ensure lines are perpendicular to one another or the edges of the material.

If marking out a curved or complex shape, it is helpful to use a template.

This is particularly useful if the shape is repeated.

Here we have a check for understanding.

What can you use to make sure lines are perpendicular to one another when marking out timber? Is it A, tailor's chalk, B, a felt tip, C, a try square, or D, a tape measure? Pause the video and have a go.

Wonderful.

Let's check.

That's right, it's a try square.

Well done.

A success criteria to support marking out could be to check straight edges, surface marks, and scratches, mark out from the edge, and use resources like an orthographic projection to support with dimensions.

Additional, material-specific success criteria include, for textiles, use tailor's chalk and a tailor's tape measure for accuracy, and use pattern pieces.

And for timber, use a pencil, metal, or safety rule and a try square.

Use a template for complex or repeated shape.

Here we have task A.

Peer assess the example of marking out using the success criteria below.

Check straight edges, surface marks, and scratches, mark out from the edge, use resources like an orthographic projection to support with dimensions, use tailor's chalk and a tailor's tape measure for accuracy, and use pattern pieces.

Pause the video and have a go.

Great, let's have a look at some of the answers you may have come up with.

Aisha says, "The shape has been marked out in the middle, which is wasting material.

The surface quality of the material is poor.

I can see damage.

A thick pen and a plastic ruler have been used instead of either a pattern piece or tailor's chalk." Well done.

We now move to the second part of our lesson, marking out a design.

Here is an orthographic projection for a design for an accessible herb planter.

Aisha says, "I changed the dimensions from my original design.

My client didn't think it would hold enough plants.

I increased the width and height after feedback." Marking out this component on MDF can be supported by an orthographic projection and success criteria.

Here we have a check for understanding.

Select the important document that can support marking out.

Is it A, a manufacturing time plan, B, a specification, or C, an orthographic projection? Pause the video and have a go.

Great.

Let's check.

That's right, it's C, an orthographic projection.

Well done.

Here is the marked out component on 12 millimetre MDF.

The success criteria used to support the marking out include to check straight edges, surface marks, and scratches, to mark out from the edge, to use resources like an orthographic projection to support with dimensions, to use a pencil, metal, or safety rule and a try square, and to use a template for a complex or repeated shape.

That wasn't necessary here.

Let's have another check for understanding.

Identify what is missing from the marking out success criteria.

Pause the video and have a go.

Wonderful.

Let's check.

Mark out from the edge was missing, and use an orthographic projection was also missing.

Well done.

Here we have task B.

Using a design that you have created, mark out one component.

Use the success criteria below for support.

Check straight edges, surface marks, and scratches, mark out from the edge, and use resources like an orthographic projection to support with dimensions.

If you choose to use textiles, you must also use tailor's chalk and a tailor's tape measure for accuracy, or use pattern pieces.

If you choose to create a component from timber, you must use a pencil, metal, or safety rule and a try square, and use a template for complex or repeated shapes.

Pause the video and have a go.

Wonderful.

Let's check.

Your answers could be check straight edges, surface marks, and scratches, mark out from the edge, and use a pattern piece.

Also, use resources like an orthographic projection to support with dimensions.

Well done.

Here we have a summary of our learning today.

Marking out is the process of measuring and drawing on a material before manufacture.

It is an important task and should be carefully and accurately completed.

It helps prevent material waste, ensures a good fit for assembly, and saves time, cost, and errors.

Different materials require specific marking tools.

Using the wrong tool can result in unclear or inaccurate marks.

To support the marking out process, use the correct equipment, an orthographic projection, for reference with dimensions, and a marking out success criteria for your material.

Well done, and thank you for joining me for our lesson today.