Fibre Types

Yarn is made from a variety of different fibres and it is important to have an understanding of where these fibres come from. The following table show some of the most common types and their origin:

 

Fibre type Yarn Origin
Natural (cellulose)
Cotton White boll which surrounds the seed of the cotton plant
Flax/linen Filament fibre from flax plants
Hemp Hemp plant (a Angiosperm phylum)
Jute Corchorus olitorius plant
Ramie Bark of Boehmeria nivea
Sisal Leaf of the Agave sisalana plant
Bamboo Stem of the bamboo plant
Paper Wood pulp
Abaca Leaf of the banana plant
Banana Stem of the banana plant
Pineapple Leaf of pineapple plant
Coir Husk of the coconut fruit
Lyocel (tencel) Wood pulp
Seacell Wood pulp and seaweed (algae)
Natural (protein)
Sheep wool Sheep hair
Alpaca Alpaca hair
Cashmere Cashmere goat
Mohair Angora goat
Angora rabbit Angora rabbit
Camel Camel hair
Horse Horse hair
Lama Lama hair
Mulberry Silk Silkworm cocoons
Tussah silk Tussah silk moth cocoon
Synthetic
Vicsose Wood pulp
Rayon Cellulose from a variety of plants
Polyester Synthetic resin
Elastane Minimum of 85% polyurethane polymer
Acrylic Minimum of 85% acrylonitrile monomer

 

Some fibres come from a natural source but are classed as synthetic. This is due to the manufacturing process the fibre has gone through to  and whether the end fibre is biodegradable.


 

Twist and Ply

What is twist and ply?

When choosing a yarn it is important to consider the twist and ply as this affects how the yarn behaves.

Twisting yarn is the process of wrapping together (in a spiral motion) fibres to make a singles yarn and then singles to make a plied yarn. Twisting fibres together, such as when spinning, gives the fibres the strength to be woven in to cloth. Twisting these singles together to make a plied yarn adds even more strength.

The ply of a yarn is the number of singles that have been twisted together to make up a yarn. A single yarn would have a ply of one.

We describe the twist of a yarn as either an ‘S’ or ‘Z’ twist. To determine which way a yarn is twisted, hold the yarn vertically and visualise the diagonal in each of these letters. If the fibres appear

to be going in the same direction as the diagonal in an ‘S’ then it is an ‘S’ twist yarn. If they are going in the opposite direction then it is a ‘Z’ twist yarn.

Why is it important?

When yarn has been plied together the single strands are often ‘Z’ twist yarns which are then plied in an ‘S’ direction.  If multiple ply ‘S’ twist yarns are then to be plied together, such as in a cord, they would be twisted in a ‘Z’ direction. Alternating twists in this way gives the yarn stability and strength.

If a yarn is plied together using the same direction twist as the single strands, for example the single strands were twisted in a ‘Z’ direction and the yarn was also plied in the ‘Z’ direction the resulting yarn will have a tendency to curl. This is apparent in fabrics such as voile.

The number of twists per meter is also important. This information is not always given with the yarn as standard but it will be displayed a TMI (twists per metre or TPI twists per inch). Some yarns are highly twisted and have lots of twists per meter while others are more softly twisted with less twists per meter. Shorter staple fibres will need a higher twist than longer staple fibres to give them the strength needed to be woven.

As a yarn’s TPM increases as does it’s strength until it reaches it ‘optimum twist’ (different for every yarn). Optimum twist is when the yarn is at its strongest. If twisted more than this it starts to weaken. weakening the yarn in this way is sometimes necessary to create a desired effect.

How twist and ply is applied

The twist of a singles/yarn defines the characteristics of the yarn:

Low twist yarns High twist yarns
Softer (produce softer, lighter fabrics) Smoother, harder and stronger (produce finer, crisper fabrics)
Absorbent Can be water repellent
Less hard wearing More resistant to abrasion and pilling
Fabric more relaxed and less likely to curl Very high twist yarns are lively and the fabric more likely to curl

It is very important to consider the twist of a yarn when weaving a fabric as this may help us us achieve a desired fabric. These are a few examples of some fabrics in which the twist is very important:

Fabric Twist characteristics
Crepe Very highly twisted yarn
Voile Fibre spun in ‘Z’ direction with yarn also spun in ‘Z’ direction. High twist yarn which likes to curl but also creates transparency.
Poplin Yarn which has been spun in an ‘S’ twist using two singles spun in ‘Z’ twists.
Herringbone structured fabric When the yarn twist and direction of the twill structure are in opposite directions the twill will be more prominent e.g. ‘S’ twist yarn with ‘Z’ direction twill

Sewing thread is made up of three ‘S’ twist singles then plied in a ‘Z’ direction which creates a tear resistant yarn.

Yarn Counts

 

Understanding Yarn Counts

What are yarn counts

Yarn counts can be a confusing topic but it is a useful piece of information.

The yarn count tells us the thickness and ply of the yarn. All yarn has a yarn count although this is not so obvious in some yarns such as knitting yarn which are often described in words e.g. double knit etc.

Counts are expressed as two numbers separated by a forward slash followed by the count system abbreviation e.g. 16/2 nm, 2/16wc etc. One number is the count, this tells us the length of yarn for a given weight of each individual strand of yarn. The other (usually smaller number) tells us how many strands of yarn have been plied together.

Some counts may be expressed with the ply number missing e.g. 16 nm. When a count is expressed like this it is assumed the ply is 1.

The twist is not measured within a yarn count as each manufacturer sets this themselves. The twist of a yarn is sometimes expressed separately as twists per inch (tpi) or twists per metre (tpm).

Different measuring systems

There are many different systems used for measuring yarn. I am just going to cover the most common ones in this post.

Count system Yarn Definition
Cotton count (cc or ne) Cottons 840 yards/pound
Worsted count (wc) Wools 560 yards/pound
Linen count (lea or nel) Linen 300 yards/pound
Numero metric count (nm or mc) Silks 1000 meters/kilo

 

Although the different systems are commonly used for specific yarns they are often used for other types of yarn too. The numero metric count is particularly used across different yarn types.

Imperial counts (cc/wc/lea) are written ply/count
Metric counts (nm) are written count/ply

Working out the yards/pound or meters/kilo

When you know the count of a yarn this enables you to work out how many metres/yards you have per kilo/pound of that particular yarn. To work this out you multiply the number of yards/meters per pound/kilo by the yarn count. Then divide this by the ply. See the table and example below:

Cotton count yards per pound = (840 x count) / ply
Worsted count yards per pound = (560 x count) / ply
Linen count yards per pound = (300 x count) / ply
Numero Metric count metres per kilo = (1000 x count) / ply

 

For example:

16/2 nm
m/kg = (1000 x 16) / 2
8000 m/kg

2/12 cc
y/lb = (840 x 12) / 2
5040 y/lb

When yarn is plied there is a little bit of take up so the amounts may not work out exactly but in thinner yarns this is negligible.

 

Being able to do this calculation is so useful because it enables you to work out how much yarn you are going to need for your project.

It is also useful to be able to convert between the two:
y/lb to m/kg multiply by 2.016
m/kg to y/lb multiply by 0.495
(these are rounded to three decimal places)

For example:
5040 y/lb x 2.02 = 10160.64 m/kg

Being able to do this calculation is so useful because it enables you to work out how much yarn you are going to need for your project.

To convert directly between metres and yards, use the following calculation:

Metres to yards multiply by 1.09
Yards to metres multiply by 0.91

Twist and Ply

 

How I make my teddy bears – stuff and finish

This is the final post in my blog series, I will show you how I stuff and finish my hand woven teddy bears.

The head is the first bit I stuff and use a fibre filling. I cannot use glass beads as with the rest of the bear because the head droops with the weight. Once it has shape I then work on the hand stitched nose and glass eyes. These need to be placed precisely to create a cute and appealing face.

 

Head finishing Collage

 

When the head is finished it is then closed up, using a ‘drawstring’ technique. At the same time the first half of a cotter pin joint needs to be trapped inside. Cotter pin joints join all of the body parts together and allow them to move.

The body, arms and legs are then all joined, but not stuffed, using four more cotter pin joints. As the joints are put in place it is important to get them tight but not so tight that it stops movement, so some adjusting is usually needed.

 

Cotter pin finishing Collage

 

The body, arms and legs are then stuffed and then hand stitched closed. I use small glass beads to stuff the body parts as it gives the teddy bear a beautiful weight and feel.

 

SONY DSC

 

Finally, each teddy bear has a Creative Threads button of authentication sewn on.

Creative Threads Button

 

I hope you enjoyed reading about how I make my hand woven teddy bears. If you would like to see any of the posts again they can be found here.

 

 

How I make my teddy bears – hand stiching the pieces

In this post you will see how the hand woven teddy bears start to take a three dimensional shape as I hand stitch the pieces together.

Due to the small size and shape of the teddy bears they all need to be sewn entirely by hand. I have tried sewing them using my sewing machine and although my it has great speed control it does not allow me to be accurate enough as I cannot see both sides at once and adjust the fitting.

 

Stitching body pieces

 

The pictures show the different stages of sewing the hand woven pieces together. I normally start with the head which has the most number of stages. I start with the ears before placing them on the head and then finally inserting the central head piece.

 

Stitching body pieces

 

Each piece has to be sewn accurately and lined up exactly. As you can see, the body pieces have small darts at the top and bottom. When sewn together these need to be lined up. For some of the more tricky parts, such as the head and feet, I tack (large loose stitches) them together so that they can be checked and adjusted to line up as I want them to.

 

Stitching arm pieces

 

When sewn together I leave an opening in each body part. This is so I can insert the cotter pin joints which join the pieces together while allowing them to move around, and of course allows me to stuff the teddy bear.

 

Stitching leg pieces

 

Look out for my next blog post when the teddy bear will really take shape with stuffing.

How I make my teddy bears – cutting the pieces

Cutting out the pieces for the teddy bears seems like a quick, simple step that doesn’t deserve it’s own post but it is a vital step that requires a lot of consideration.

Once the fabric has been woven I wash and iron it. This softens the fabric and if it is a woollen fabric then it helps to tighten the weave.

Teddy bear fabric

The pattern of the fabric really determines where I place the teddy bear pattern pieces. If the fabric is all one colour or the pattern is more of a texture then I would probably just place them all on the in the same direction on the fabric with the selvedges vertical. However, if there are stripes or a larg pattern then where I place the pattern pieces really makes a huge difference to the final look of the teddy bear. The things I consider are:

  • The direction I want the stripes on the teddy bear, this may be horizontal, vertical or diagonal
  • Whether the teddy bear is going to be symmetrical
  • How I want the pattern to cross the seams of the bear

The images below show three different ways I might place the pieces on a stripy fabric. The first shows how the pieces would be placed for vertical stripes, the second horizontal and the third diagonal. All three would also be symmetrical teddy bears.

Teddy bear layout (one) Teddy bear layout (two)  Teddy bear layout (three)

Once I have decided how I want the teddy bear to look and therefore how I am going to place the pieces they can then be cut out as shown below.

 

Teddy bear pieces

The teddy bear is then ready to be sewn together and will start to take shape.

Have a look at my next post to find out about stitching the pieces together.