It’s been five years since a roller derby ball was invented.
But the game’s popularity is growing exponentially as more teams compete.
The number of teams in the UK is on track to double by 2020.
In the US, the number of roller derby teams has tripled in the past year.
So why is this ball still not being manufactured?
“The ball is actually quite complex.
We have a large amount of engineering involved with making the ball, which is a bit like creating a whole new shoe,” says Adam Williams, a manufacturer of roller skaters’ balls.
“It’s not just a matter of making a ball, we also have to make it fit and feel good.”
To get around this technical challenge, Williams has developed a ball-making process that has the same characteristics as the real thing.
He uses a mixture of metal, plastic and wax to make the balls.
He also uses a “bonding compound” that bonds together the plastic and rubber to create a hard and durable material that’s durable enough to withstand the wear and tear of daily life.
“When we start making the balls, the plastic we use has to be the same thickness as the wax, so the ball will stay solid.
If you use a thinner ball, it doesn’t bond with the wax and becomes a ball of sand or something,” Williams says.”
There are two different kinds of balls that we use: a soft ball that is made from recycled plastic and a ball that we buy from manufacturers.”
Williams says that the soft ball is used in smaller teams because the ball has to fit in with the other team’s equipment.
“Soft balls are easier to shape and easier to clean,” he says.
But it is also the softest ball on the market.
“The balls that come out of the ball maker are actually really soft, and are a lot easier to grip than a real ball,” he explains.
“Soft balls that are soft are also more durable, and the ball is a lot more forgiving.
They’re softer, and have less grip than the balls that you have to buy from the manufacturer.”
The soft ball comes in two main varieties.
The first one, the ‘Rolls’, is made with 100 per cent recycled plastic.
This ball is more flexible and more durable than the standard soft ball.
It is also made from wax, which allows the ball to bend easily.
It’s also made of a compound called ‘polyethylene’ (PE), which is also known as polyvinyl chloride (PVC).
“Polyethylene is the plastic that we typically use to make footballs, but we’re not as commonly using it as we used to, so we use it in the ball making process,” Williams explains.
He explains that it’s important to know what the material used is, because if it’s made from PVC, it will deform during the production process.
“We have to know the materials that we’re using, and also how they’re supposed to deform,” Williams adds.
“If you’re making a softball, you’re going to make this ball to a certain extent, because the shape of the plastic is going to deform.
So if it breaks off, it breaks the ball in half.”
This process takes about 10 hours, and involves a process of bending the plastic to shape the ball.
“There’s some really good plastic that comes out of this process that we’ve been using in our ball making,” Williams confirms.
This process is then repeated on the softer ball.
After the process, the ball can then be sold for a price that is lower than a regular softball.
It costs around £10 to £15 per ball.
The softball ball also has a protective coating, called ‘moxi’, which can help the ball stay soft even after the ball matures.
“It’s a protective layer that’s going to help it last longer,” Williams reveals.
“When we are making a hardball, we use plastic, so there’s a layer of plastic over the ball that’s a bit tougher than the other materials that are used in roller skating.”
Rolling balls are also made by using different materials.
The softball’s balls are made from plastic, and plastic is used for the ball’s protective coating.
“So we have different materials in the softball balls,” Williams tells Al Jazeera.
“The softer ball comes with a protective film, which helps it last a longer time.
The softer ball is also covered with a rubber coating.
And the soft balls that came from our manufacturing process, we’ve had them with a wax coating as well.”
Rollers, by contrast, are made with plastic and are made of wax.
The wax helps the ball stick to the rubber, so it lasts longer.
The balls are often used in a wide variety of sports, from golf to football to squash.
“So we’ve got to make sure that we can make the