آموزش ساخت پولیش یا براق کننده فلزات ( آزمایشات جذاب )

Summary

In this video, Dr. Meisam Rahmani demonstrates how to clean and polish metal coins using a popular metal polish cream. He provides a step-by-step tutorial, showcasing how to clean brass, copper, nickel, and other coins, including historical ones like those from the Pahlavi era. Dr. Rahmani explains the materials needed, such as citric acid, aluminum sulfate, and tartaric acid, and highlights the importance of proper mixing and application. The process results in coins that shine like new, with comparisons made between cleaned and uncleaned coins. The video encourages viewers to engage with the channel and participate in future polls for new content.

Takeaways

• 😀 The video provides a tutorial on how to use metal polishing paste or cream, specifically from the Jalas brand, for cleaning and polishing coins.
• 😀 The presenter demonstrates the cleaning process on different types of coins, including brass, copper, nickel, and a few historic coins from the reign of Mohammad Reza Shah Pahlavi.
• 😀 The tutorial emphasizes the use of a specific mixture, including citric acid, potassium alum, tartaric acid, and a thickening agent (HAC) to create the polishing paste.
• 😀 The presenter highlights the importance of correctly weighing and mixing the ingredients to achieve the right consistency for the paste.
• 😀 Water is added to the mixture gradually to create a paste-like consistency suitable for polishing.
• 😀 The process is demonstrated step-by-step, starting with weighing the ingredients and moving on to mixing and applying the paste to the coins.
• 😀 The paste is applied to the coins using a soft cloth, which helps restore their shine and cleanliness.
• 😀 Different types of coins are shown before and after polishing, with a noticeable difference in their brightness and cleanliness after treatment.
• 😀 The video mentions the term 'bank coins' (coins that look new and shiny) and explains that coins treated with this method can be considered more valuable due to their pristine condition.
• 😀 The tutorial also briefly touches on the history of certain coins, such as those from the era of Mohammad Reza Shah and Dr. Mohammad Mossadegh, highlighting their historical significance.
• 😀 The presenter encourages viewers to subscribe to the channel for more tutorials, share their feedback, and engage with the content to improve future videos.

Q & A

What is the main focus of the video?

The video focuses on demonstrating how to use a metal polishing cream or paste to clean and polish various types of coins, including brass, copper, and nickel coins.

Who is the presenter of the video?

The presenter is Dr. Meysam Rahmani, who is addressing the audience of the 'Attractive Experiments' channel.

What types of coins are being polished in the video?

The coins being polished include brass coins, copper coins, and nickel coins, as well as older coins from the reign of Mohammad Reza Shah and Dr. Mohammad Mossadegh's time.

What ingredients are needed for the metal polishing paste?

The ingredients required for the paste include 0.5 grams of citric acid, 0.5 grams of tartaric acid, 4 grams of HEC (a thickener), and 0.5 grams of aluminum potassium sulfate (also known as alum).

What is the role of HEC in the paste?

HEC (hydroxyethyl cellulose) acts as a thickening agent in the metal polishing paste, helping to give the mixture a suitable consistency for application.

Why is it important to grind the ingredients before mixing them?

Grinding the ingredients ensures that they are thoroughly mixed, creating a uniform paste that will work effectively on the metal surfaces. Some ingredients, like citric acid and alum, need to be ground to break them down into fine particles.

What safety precautions should be taken when handling the ingredients?

While the ingredients themselves are not highly hazardous, it is recommended to wear gloves to avoid skin irritation, especially when handling the acidic components. The paste is not highly acidic, but it may cause some sensitivity upon contact.

What is the effect of the polishing paste on the coins?

The polishing paste effectively cleans and enhances the appearance of the coins, restoring their shine and brightness. It removes dirt and oxidation, making the coins look more polished and valuable.

What does the term 'bank-quality coins' refer to in the video?

'Bank-quality coins' refers to coins that are in pristine condition, without scratches or tarnish. These coins are highly polished, often using methods like the one demonstrated in the video, and they are considered more valuable than worn or used coins.

How does the paste affect the appearance of brass coins?

The paste gives brass coins a bright, shiny golden appearance, especially when applied carefully and for a longer period. It enhances the coin’s luster and makes it look much more polished compared to its original state.