Temperature controlled bubble glass dip pen-4 colors

Have you heard of liquid-gas phase exchange experimenter and love thermometer? Mr. Sai Science Factory now uses it on stationery When you hold the lower end of the pen ball, the liquid in the ball will magically rise and bubbles will appear continuously, as if it has a life of its own. And when you gently let go of your hand, the cool air causes the liquid to return to the lower part and return to its original state. This is because the warmth of your hands turns the liquid into a gas while increasing the air pressure, pushing the liquid to new heights. When you remove your palm, the temperature of your hand drops, causing the liquid in the container to re-cool. This causes the gas to turn back into a liquid and the gas pressure decreases. The reduced air pressure causes the liquid in the ball to flow back into the lower part of the container, restoring equilibrium. Temperature-controlled bubble glass dip pen allows you to hold a simple physics experiment in your hand Shows how liquids and gases are related and how they are affected by temperature and air pressure. The temperature-controlled bubble glass dip pen not only has a unique design, but the temperature-control function can provide the best writing temperature, and the smoothness of the water allows you to write easily. It also uses a more interesting way to demonstrate physical phenomena and educate scientific principles. The glass material allows you to feel perfect contact with the paper, writing smoothly and freely, giving you a high-quality writing experience. Whether you are a student, artist, or calligraphy enthusiast, you can find a pen to suit your needs. Precautions : ► This is a glass product, please use it carefully to avoid damage to the product. ► Please rinse the pen tip with clean water after use, or insert the pen tip into clean water to rinse, and dry it thoroughly with a cloth or paper towel. About glass dip pen Glass pen (Japanese: ガラスペン), also known as Venezianische Glasfeder, Based on the principle of capillary action, the ink is stored in several grooves on the pen head. These grooves also guide ink to the pen tip, forming a special ink supply device. The amount of ink produced when writing and the thickness of the handwriting lines are determined by the depth and width of the ink storage groove on the pen head and the writing angle. The main shapes of the ink storage tank are straight grain and spiral grain. In addition to visual beauty, changes in grain can also provide longer and more ink storage space. There are two main types of glass pens: glass fountain pens and glass dip pens. What is capillarity? Capillarity (also known as capillary action) It refers to the liquid inside the thin tube-shaped object, which is composed of the adhesion between the liquid and the object and the surface tension generated by the cohesion. The phenomenon of causing liquid to flow to a thin tube-like object without applying external force. This phenomenon even causes liquids to rise against the force of gravity. (Quoted from wikipedia) What is a liquid-vapor phase exchange experimenter (love thermometer)? Its real English name is Hand boiler. It is a glass sculpture used as an experimental tool to demonstrate vapor-liquid balance. In popular culture, the whimsical way of "measuring love" is to have a person grab the lower glass sphere to "prove" how passionate one is. Or a couple would each grab one end and see who could force the liquid into the other's balls. The function of Hand boiler is similar to that of Drinking Bird. The structure is usually a hollow glass tube filled with a volatile liquid, usually acetone or alcohol. The glass tube is closed at both ends, and the user can hold it, and when the temperature of your hand is transferred to the liquid inside, the temperature of the liquid increases. Volatile liquids already have a certain vaporization pressure at room temperature. When the temperature of the liquid increases, this pressure increases. Hand boilers are sometimes used to demonstrate distillation characteristics. Since liquids evaporate and condense at relatively low temperatures in a closed system, the boiler can be turned upside down and the top end placed in ice water. The gaseous form of the liquid will condense in the cooling chamber. Since liquids are often colored with dyes, but dyes do not evaporate or condense at the same temperature, The liquid that condenses in the cooling chamber is therefore colorless, leaving behind the pigment. If you are interested in learning more, please click on the link below: (The following refers to Wikipedia: Hand boiler) {\displaystyle \Delta h={\frac {\Delta p}{\rho g}}} \Delta h = the height of the column of fluid above the fluid's level in the lower bulb \Delta p = the difference in vapor pressure between the two bulbs (which can be determined via the Antoine equation) \rho = the density of the liquid g = the acceleration of gravity at the Earth's surface Product specifications: ► Pen body size: 18.5*1.4cm Outer box size: 20.5*3.5*5.8cm Ink: 5ml ► Ingredients: glass, ink ► Manufacturing place: China Precautions : ► This is a glass product, please use it carefully to avoid damage to the product. ► Please rinse the pen tip with clean water after use, or insert the pen tip into clean water to rinse, and dry it thoroughly with a cloth or paper towel. (Due to hand-made production, there will be slight color differences, which are normal and do not affect use. See the picture above for comparison)