The history of 3D printing technology is not long. In 1984, Charles Hull developed 3D printing technology. In 1986, the technology was patented, and Charles Hull named it stereolithography and founded 3D Systems to develop the first commercial 3D printer.
In 1987, DTM (now a subsidiary of BFGoodrich) developed selective laser sintering (SLS) technology and commercialized it.
In 1988, 3D Systems developed the SLA-2502 device and sold it to the public. In the same year, Scott Krump developed fused deposition modeling (FDM) technology and established Stratasys in 1989.
In 1991, Helisys sold the first layered physical manufacturing (LOM) system.
In 1992, Stratasys sold the first batch of FDM-based "3D modeling" machines. In the same year, DTM sold the first SLS system.
In 1993, the Massachusetts Institute of Technology obtained a patent for "3D printing technology", which is similar to the inkjet printing technology used in 2D printers.
In 1995, the Massachusetts Institute of Technology developed the 3D printing (3DP) technology for powder layers and nozzles. Company Z obtained the exclusive authorization to use "3D printing (3DP) technology" from MIT, and based on the 3D printing technology Developed a 3D printer.
In 1996, 3D Systems introduced the "Actua 2100" rapid prototyping machine. In the same year, Stratasys launched "Genisys" and Z launched "Z402", using the term "3D printer" for the first time.
In 1997, EOS sold the 3D stereo system business to 3D Systems, but it is still the largest manufacturer in Europe.
In 2005, Z Company launched "SpectrumZ510". This is the first high-precision color 3D printer on the market.
In 2006, the RepRap open source project was launched with the goal of developing a 3D printer capable of self-replication.
In 2008, the first version of the RepRap machine was launched, which can print about 50% of the machine's own parts. In the same year, Objet Geometries announced the revolutionary "Connex500" rapid prototyping system, the first ever 3D printer capable of using several different materials at the same time.
Since then, many manufacturers have launched various models of 3D printers. It is worth mentioning that in September 2011, the Vienna University of Science and Technology launched the world ’s smallest 3D printer with a weight of only 1.5 kg and a quotation of about 1200 euros. In 2012, the MakerBot personal 3D printer was put on the market, which used RepRap Printing technology, the price is reasonable, can be used at home.
Lipstick, a cosmetic that is applied to the lips to make them red and bright, is a cosmetic that is mainly used on the lips and can increase the color of the lips or change the color of the lips. It is one of the important makeup.
First of all, before applying lip balm, you must wash your lips, and then apply a layer of lip balm or anti-crack ointment to protect your lips and prevent cracks, so as to better make up. Shade your lips with foundation or masking cream.
Next, use a lip liner to outline the ideal line, with the lips naturally relaxed, so that you can better observe the shape of the lip line. Draw in the order of the upper and lower lips, with the upper lip closed and drawn from the center to the sides. The bottom lip is drawn from the sides toward the center. If you don't want to accentuate your lips, you can skip the line. Hold a lipstick or lipstick-stained lip brush between your thumb and forefinger. Press your pinky finger against your chin to hold and support the handle. Trace the lip hill and the center of your lower lip to determine the thickness of your lip.
Then, from the corners of the upper lip to the middle of the lip, and from the corners of the lower lip to the middle of the lip, with the lips slightly open to create a better line. Pay attention to the balance between left and right. After applying the outside, gradually apply to the inside until it is all over. Press lightly on your lips with a face paper to remove excess oil. Press, slightly open the lips, the effect can reach the inside of the lips. Plump up your lips by applying a glossy lipstick or an accent silvery lipstick in the center of your lips.
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