science

Pratley Putty

Pratley Putty is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Pratley Putty rather than just read about it. In short: Pratley Putty is an epoxy putty adhesive. It was invented in the 1960s by South African George Montague Pratley, with the assistance of chemist Frank Robinson.

Key takeaways

Pratley Putty belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Pratley Putty to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Pratley Putty from memory before moving on to harder problems.

Reference excerpt

Pratley Putty is an epoxy putty adhesive. It was invented in the 1960s by South African George Montague Pratley, with the assistance of chemist Frank Robinson. It is produced by adhesive manufacturer Pratley.

History According to the manufacturer's official history, "The product was developed as an insulator and also as an adhesive agent for fixing brass terminals which were located inside cast iron junction boxes". As time went by, many other uses were found for the putty, which enabled it to penetrate both the consumer, industrial, and mining markets. This versatile epoxy putty, originally called "Pratley Plastic Putty", was the first of its kind in the world and was used on the Ranger spacecraft that went to the moon in the mid 1960s. This earned the product the distinction of being the only South African product to have gone to the moon. It has also been used on a repair job for the Golden Gate Bridge in San Francisco. In South Africa, the holes in two partially sunken ships were repaired with Pratley Putty, which can also cure under water. In 2019 Pratley Putty became a part of the SA Mint's "South African inventions" commemorative coin series, commemorating its use in space.

Related Products Today the company also produces a fast-curing version of Pratley Putty called Pratley Quickset® Putty as well as a metallic-looking version called Pratley Steel Putty. Other products produced are epoxy, acrylic, cyanoacrylate, silicone, anaerobic and proprietary hybrid adhesives.

References

External links Official website

Worked examples

Example 1 — a first encounter with Pratley Putty

Start with the simplest possible case. Write down what Pratley Putty claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Pratley Putty before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Pratley Putty ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Pratley Putty

In research: Pratley Putty appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Pratley Putty in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Pratley Putty is common in secondary-school and first-year university syllabi. It links to neighbouring topics Adhesives, South Africa stubs, South African inventions, so understanding it makes those chapters shorter.
In everyday life: Look for Pratley Putty outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Pratley Putty in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Pratley Putty means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Pratley Putty out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Pratley Putty in simple terms?

Pratley Putty is an epoxy putty adhesive. It was invented in the 1960s by South African George Montague Pratley, with the assistance of chemist Frank Robinson.

Why does Pratley Putty matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Pratley Putty?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Pratley Putty.