The human skin is very sensitive to temperature. When the skin temperature reaches 45°C, the person will have a burning feeling. When the temperature reaches 72°C, it will cause second-degree burns to the skin.

Alice Stoll and Maria Chianta in the latter half of 1960s, conducted a series of experiments on live, anesthetized test subjects. They recorded the time required for a given heat source at which the onset of pain occurred, producing minimal blistering within 24 hours. Simply put, the time duration in seconds to produce a second-degree burn was recorded at different heat intensities (heat flux).

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Sketch pens, with their vibrant colors and versatile applications, have become essential tools for artists, students, and creative individuals alike. These handy tools offer a wide range of advantages that make them a preferred choice for various artistic and practical purposes. In this article, we will delve into the many benefits of using sketch pens, shedding light on why they have become a staple in the world of art and beyond.

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Promarks is the leading manufacturer of industrial packaging and processing machines for nearly 30 years! From tabletop vacuum machines to high volume machines, Promarks can assist you in improving the quality, speed, and efficiency of your food processing and production. At Promarks, we engineered our machines from the ground up to be better and more price-competitive than any other machine in the industry. Promarks has manufactured a complete line of innovative packaging and food processing machines with an outstanding reputation for quality, durability, and reliability.