Is the laser marking machine harmful to the human body? It depends on what you are marking. If toxic gases are produced during operation, it will cause damage to the body. Large laser marking may produce noise and strong light, which may cause certain damage to the auditory and visual nervous systems in the long term. It is recommended to take protective measures during operation to prevent such strong light from causing visual fatigue or electro-optical conjunctivitis. The laser used in the laser marking machine belongs to Class 4 laser, and its output laser is invisible infrared light, which may cause third-degree burns even in the case of defocus. The laser output beam contains visible and invisible radiation, which is harmful to the human eye. Avoid exposing the eyes or skin to direct laser beams or scattered radiation. Before operating or using a laser marking machine, all personnel around the equipment must use special safety protection devices equipped for it. To prevent accidental exposure to direct or scattered lasers.

 Some people say that laser marking machines, because they involve laser technology, will bring problems such as high radiation, strong light that damages eyesight, produces toxic gases, and burns human skin.

 Now let’s answer one by one whether laser marking machines are as dangerous as people say.

 1. Does laser marking bring high radiation?

 There is radiation, but it is definitely not high radiation. Many things will produce radiation, even ourselves - the human body produces trace amounts of radiation every day, which is normal. And there are many types of radiation: nuclear radiation, solar radiation, electromagnetic radiation, computers. Radiation, etc. are often mentioned by everyone, and they all have the potential to cause harm to the human body.

 Here are some data for your reference:

 (1) The maximum radiation level that the human body can withstand: The academic community currently believes that radiation levels of 1000 millisieverts will cause significant harm to the human body.

 (2) Cell phone radiation is measured by the SAR value, which represents the amount of radiation that a living organism (including the human body) can absorb per unit kilogram. This SAR value represents the impact of radiation on the human body and is the most direct test value. Taking the brain, a sensitive part of the human body, as an example, its SAR standard value must be lower than 1.67 watts.

 (3) Relevant data show that the highest SAR value of a CDMA mobile phone currently in use on the market is 1.55W/KG, while the highest SAR value of a GSM mobile phone is 1.49W/KG. The lowest SAR value of a CDMA mobile phone is 1.07W/KG, while the lowest SAR value of a GSM mobile phone is 0.22W/KG.

 (4) Taking a 20W fiber laser marking machine as an example, its radiation in operation is 0.00029W/cm^2, while the microwave radiation standard established in 1998 is 0.00045W/cm^2. It can be said that the radiation generated during the use of a laser marking machine is much smaller than that generated by using a mobile phone or a household microwave oven.

 Smart devices we usually use, such as mobile phones, computers, and televisions, all have their own radiation. In the process of marking with a laser marking machine, a trace amount of radiation is indeed generated, but this amount of radiation is even lower than the radiation you receive when basking in the sun outdoors.

 2. Will toxic gas be produced during the marking process?

 First of all, the laser marking machine uses the thermal energy of the laser to burn or etch the marked object, thereby forming everything needed such as text, patterns, and marks. Production can be achieved by simply turning on the power. During the marking process, trace amounts of toxic gases may sometimes be generated depending on the material.

 like:

 (1) Plastics: Most of them will produce phenolic gas after burning. When polyvinyl chloride insulation is burned, it releases a large amount of hydrogen chloride gas. The flue gas contains a large amount of carbon monoxide, plastic hot medium gas and sulfide and other mixed toxic gases. But this is when the plastic is completely burned. Of course, the heat during laser marking will also cause the plastic to produce trace amounts of toxic gases.

 (2) Most metal materials that can be used for laser marking usually do not produce toxic gases due to their stable properties and high density, but aluminum materials will produce trace dust during the marking process.

 Therefore, laser marking is best performed in a well-ventilated environment or with professional cleaning equipment.

 3. Will laser burn human skin?

 The laser emitted by the laser marking head will have a certain amount of high heat. The laser used in the laser marking machine belongs to Class 4 laser, and its output laser is invisible infrared light, so be careful to avoid exposing your eyes or skin to direct laser beams or scattered radiation. Note that it is direct. Therefore, as long as the laser marking is not triggered intentionally in dangerous situations, and few people will directly put their hands or other parts of the body under the laser marking head. In addition, the application of laser technology on human skin is also a very common technology, such as laser mole removal, laser tattoo, etc.

 4. Does the strong light from laser marking damage your eyesight?

 Yes, especially when used for marking glass or crystal products, the brightness of the laser is very high. Long-term direct viewing will cause vision loss, and in severe cases, it may even damage the lens, causing inexplicable black spots in the vision in the future. Therefore, during the operation, either wear protective equipment or try to avoid direct viewing of the laser for a long time and at close range.

 In summary, laser marking machines do carry a small amount of harmless radiation to the human body. Long-term close-range exposure or direct viewing of lasers can cause irreversible damage to the eyes, but this is often the case in extreme cases with a very low probability of occurrence. Therefore, more and more manufacturers still tend to use laser marking machines for production, because it has clear and permanent marking effects, fast marking speed, high efficiency and low consumption, and has gradually become the first choice in the product packaging and identification industry.