Silly Putty

Silly Putty is a very strange toy.

It can act like many things. If you drop it, it bounces like a ball. If you pull it fast, it snaps.

If you leave it alone, it flows like a slow liquid. It can even float in water.

People first made it to find a new kind of rubber. It was made during a big war. Later, it became a famous toy. It even went into space with astronauts!

It is a fun thing to play with.

Silly Putty is a very strange toy.

It acts like many different things. It is a non-Newtonian fluid. This means it changes how it flows based on force. If you hit it fast, it acts like a solid. It might even break. If you drop it, it bounces like a ball.

If you leave it alone, it acts like a liquid. It will slowly flow into a puddle.

People first made it to find a new rubber. This happened during World War II. Scientists wanted a way to make rubber for tires and boots. They found that mixing silicone oil with boric acid worked well. It was not a perfect rubber, but it made a great toy.

Peter Hodgson began selling it in plastic eggs. He named it Silly Putty. It became a huge hit!

It even went into space. Apollo 8 astronauts took it into orbit. Today, it is in the National Toy Hall of Fame. You can find it in many colors. Some even glow in the dark!

Silly Putty is a very strange and fun toy.

It is what scientists call a non-Newtonian fluid. This means it changes how it behaves when you use force on it. If you hit the putty very fast, it acts like a hard solid. It might even snap or break into pieces. However, if you drop it, it bounces just like a rubber ball.

If you leave it alone for a long time, it acts like a liquid. It will slowly flow out and form a flat puddle. This special way of working is called viscoelasticity. It acts like a liquid over a long time but like a solid over a short time.

There are many ways this putty works in your hands. It can float on top of a liquid. You can also use it as an adhesive to pick up tiny things. In the past, people used it to copy images from newspapers. This worked because the putty would grab the old petroleum-based ink.

You can also use it to clean up dirt or pet hair from surfaces. If you get it on your clothes, alcohol can help remove it. This is because the alcohol dissolves the material. Be careful with warm water, though. Submerging the putty in hot water makes it melt and flow much faster.

This material was not originally made to be a toy. It was created during World War II. During that time, Japan invaded countries that produced rubber. This made it very hard for the United States to get rubber. The country needed rubber for things like tires, boots, and gas masks. Because of this, the government paid for research into synthetic rubber. Different people claim they invented it. Some say it was Earl Warrick, while others say it was James Wright in 1943. Both researchers found that mixing boric acid with silicone oil made a bouncy material.

After the war, a man named Peter Hodgson turned it into a famous toy. In 1949, he began selling the putty in clear plastic eggs. He called the product Silly Putty. Even though sales were slow at first, a magazine article helped it grow. Soon, he was selling 250,000 eggs in only three days! By 1955, most people buying it were children between six and twelve years old.

Since 1950, more than 300 million eggs of Silly Putty have been sold. It even went into space! In 1968, astronauts took it into lunar orbit on Apollo 8.

Today, Silly Putty is used for much more than just playing. Doctors use it for therapy to help people with hand injuries. Scientists even use it to polish the mirrors on big telescopes.

Some researchers found that mixing it with graphene can make a sensor. This sensor is so sensitive it can measure the footsteps of a tiny spider. You can find Silly Putty in many colors today. Some versions are metallic or even glow in the dark. It is such a special invention that it joined the National Toy Hall of Fame in 2001.

Silly Putty is a unique substance known for its unusual physical properties. It is a toy made of silicone polymers that behaves in many different ways. Depending on how much force you apply, it can act like a liquid or a solid. This makes it a fascinating subject for scientists studying how materials move. It is a famous example of a non-Newtonian fluid.

The core of this behavior is a property called viscoelasticity. This means the material acts as a viscous liquid over a long period of time. However, it acts as an elastic solid over a short time period. Because its apparent viscosity increases when force is applied, it is also a dilatant fluid. If you strike the putty sharply, it will break or snap like a solid. If you drop it from a height, it will bounce like a rubber ball.

To understand its makeup, we can look at the original coral-colored version. It is composed of 65% dimethylsiloxane, which are hydroxy-terminated polymers with boric acid. It also contains 17% silica, which is a type of crystalline quartz. Other ingredients include 9% Thixatrol ST, a derivative of castor oil. The rest consists of polydimethylsiloxane, decamethyl cyclopentasiloxane, glycerine, and titanium dioxide. These specific ingredients allow the putty to flow and bounce.

The history of Silly Putty began during the era of World War II. At that time, Japan invaded countries that produced natural rubber. This created a massive shortage for the United States. The government needed rubber for tires, boots, gas masks, and aircraft parts. Because of this, researchers studied synthetic rubber compounds to find a substitute. The credit for the invention is disputed among several people. Some attribute it to Earl Warrick of Dow Corning, while others credit James Wright in 1943.

In 1949, a toy store owner named Ruth Fallgatter discovered the material. She contacted a marketing consultant named Peter C. L. Hodgson. Hodgson decided to market the substance by selling it in plastic eggs. He named the product Silly Putty and priced the eggs at one dollar. While initial sales were slow, a New Yorker article helped increase demand. Hodgson soon sold 250,000 eggs in just three days. However, the Korean War caused a shortage of silicone, which is the main ingredient.

Silly Putty has reached incredible milestones in its long history. Since 1950, more than 300 million eggs have been sold worldwide. By 1957, Hodgson produced the first televised commercial for the toy. It became a global hit, reaching the Soviet Union and Europe by 1961. The material even traveled to space in 1968. Apollo 8 astronauts took Silly Putty into lunar orbit. In 2001, the toy was inducted into the National Toy Hall of Fame.

Beyond being a toy, Silly Putty has many practical applications. Occupational therapists use it for rehabilitative therapy for hand injuries. Because it is an adhesive, Apollo astronauts used it to secure tools in zero gravity. Scale model builders use it as a masking medium for spray painting. Even the Steward Observatory uses a Silly Putty-backed lap to polish telescope mirrors. It can even be used to clean dirt, lint, or pet hair from surfaces.

Modern science continues to find new uses for this strange material. Researchers at Trinity College Dublin discovered a special mixture using graphene and Silly Putty. This nanocomposite mixture behaves as a very sensitive pressure sensor. It is so precise that it can measure the footsteps of a crawling spider. This shows how a simple toy can lead to advanced scientific discoveries. The material continues to fascinate both children and researchers alike.