science

Tomato paste

Tomato paste 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 Tomato paste rather than just read about it. In short: Tomato paste is a thick paste made from tomatoes, which are cooked for several hours to reduce water content. The seeds and skins are then strained out and the liquid is cooked again to reduce to a thick, rich concentrate.

Key takeaways

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

Reference excerpt

Tomato paste is a thick paste made from tomatoes, which are cooked for several hours to reduce water content. The seeds and skins are then strained out and the liquid is cooked again to reduce to a thick, rich concentrate. Tomato paste is used to impart an intense tomato flavour in dishes such as pasta, soups and braised meat. It is used as an ingredient in many world cuisines. By contrast, tomato purée is a liquid with a thinner consistency than tomato paste, while tomato sauce is even thinner in consistency.

History and traditions Tomato paste is a traditional food ingredient used in many cuisines. One traditional practice in Northern Italy involved spreading out a much-reduced tomato sauce on wooden boards that were set outdoors under the hot sun to dry the paste until it was thick enough, when it was scraped up and held together in a dense mass. Commercial production uses tomatoes with thick pericarp walls and lower overall moisture.

Regional differences Tomato paste in Iran is made by cooking tomatoes for a long time to reduce the water content, removing the seeds and skin, and cooking it more to make a thick condiment. In the US, tomato paste is simply concentrated tomato solids (no seeds or skin), and with a standard of identity (in the Code of Federal Regulations, see 21 CFR 155.191). Tomato purée has a lower tomato soluble solids requirement, the cutoff being 24%. For comparison, typical fresh round tomatoes have a soluble solid content of 3.5–5.5% (refractometric Brix), while cherry tomatoes have double the amount. Flavor is generally related to the relative concentrations of sugars and acids in the fruit, mainly fructose and citric acid. The best, most flavorsome combination is a high sugar and high acid content. Crop nutrition can influence tomato taste.

Uses Tomato paste is added to dishes to impart an intense flavour, particularly the natural umami flavour found in tomatoes. Examples of dishes in which tomato paste may be commonly used include pasta sauces, soups, and braised meat. The paste is typically added early in the cooking process and sautéed to achieve caramelization. Based on the manufacturing conditions, the paste can be the basis for making ketchup or reconstituted tomato juice:

Hot break: heated to about 100 °C (212 °F), pectin is preserved, paste is thicker and can be used for ketchup Warm break: heated to about 79 °C (174 °F), colour is not preserved, but flavour is preserved Cold break: heated to about 66 °C (151 °F), colour and flavour are preserved, so it can be reconstituted into juice

See also Salça – tomato paste from Turkey Chili sauce and paste List of tomato dishes

References

Illustrations

Worked examples

Example 1 — a first encounter with Tomato paste

Start with the simplest possible case. Write down what Tomato paste 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 Tomato paste 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 Tomato paste 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 Tomato paste

In research: Tomato paste 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 Tomato paste 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: Tomato paste is common in secondary-school and first-year university syllabi. It links to neighbouring topics Food ingredients, Food paste, Tomato products, so understanding it makes those chapters shorter.
In everyday life: Look for Tomato paste 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 Tomato paste in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Tomato paste 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 Tomato paste out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tomato paste in simple terms?

Why does Tomato paste 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 Tomato paste?

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 Tomato paste.