Đồng hồ sử dụng mặt kính Sapphia từ bao giờ?
- Thread starter thangkv
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Em tìm được cái này không biết phải cái bác muốn tìm ko?
"Synthetic sapphire was invented in the 19th century and first used for watch crystals in the 1960s. Now really all high-end watch brands use synthetic sapphire crystals in at least some of their models."
trích "http://www.europastar.com/europastar/watch_tech/watchcrystals.jsp"
"Synthetic sapphire was invented in the 19th century and first used for watch crystals in the 1960s. Now really all high-end watch brands use synthetic sapphire crystals in at least some of their models."
trích "http://www.europastar.com/europastar/watch_tech/watchcrystals.jsp"
thêm tý nữa ạ 
Sapphire crystals are composed of Corundum. In the early 1960's, they were being used for ladies watches and were faceted. These were used in very small faced ladies watches and were very expensive to produce.
In the early to mid 1980's, sapphire crystals were beginning to be offered more for men's watches. I was one of the first to use sapphire crystals in about 1983 or so. Subsequently, Rolex began using sapphire crystals in the mid to late 1980's. On a further note, I use thick contoured sapphire crystals which cost about 3.5 times more than flat sapphire crystals. Many companies producing watches that cost thousands more than mine use flat sapphire crystals as a cost cutting method.
Sapphire crystals are currently the best and most durable material available for watch crystals. They are synthetically made and rate 9 on the Moh's scale of hardness. The only thing harder, and capable of scratching a sapphire crystal, is a diamond which rates a 10 on the Moh's scale of hardness. Synthetic Sapphire (AL2O3), is produced from aluminum oxide. It is much less expensive than natural sapphire but is absolutely identical regarding structure, properties, and quality.
Here are some of the technical characteristics of Sapphire Crystal:*
Physical Properties:
Crystalline Structure: Rhomboedral hexagonal single crystal
Density: 3.98 gm/cm3
Composition: AL2O3
Thermal Properties:
Melting Point: 2320°K 3716°F 2047°C
Softening Point: 2070°K 3266°F 1797°C
Mechanical Properties:
Hardness: 9 Mohs 2500-3000 Vickers 1800-2200 Knoops
Optical Properties:
Transmission: Visible Light >> Excellent
*Specs. obatined from Stettler Saphir Tech Info Library
Link đọc thấy rất thú vị và chi tiết về kính sapphire này: http://www.pmwf.com/cgi-bin/ForumArchive/webbbs_config.cgi?noframes;read=273655
Sapphire crystals are composed of Corundum. In the early 1960's, they were being used for ladies watches and were faceted. These were used in very small faced ladies watches and were very expensive to produce.
In the early to mid 1980's, sapphire crystals were beginning to be offered more for men's watches. I was one of the first to use sapphire crystals in about 1983 or so. Subsequently, Rolex began using sapphire crystals in the mid to late 1980's. On a further note, I use thick contoured sapphire crystals which cost about 3.5 times more than flat sapphire crystals. Many companies producing watches that cost thousands more than mine use flat sapphire crystals as a cost cutting method.
Sapphire crystals are currently the best and most durable material available for watch crystals. They are synthetically made and rate 9 on the Moh's scale of hardness. The only thing harder, and capable of scratching a sapphire crystal, is a diamond which rates a 10 on the Moh's scale of hardness. Synthetic Sapphire (AL2O3), is produced from aluminum oxide. It is much less expensive than natural sapphire but is absolutely identical regarding structure, properties, and quality.
Here are some of the technical characteristics of Sapphire Crystal:*
Physical Properties:
Crystalline Structure: Rhomboedral hexagonal single crystal
Density: 3.98 gm/cm3
Composition: AL2O3
Thermal Properties:
Melting Point: 2320°K 3716°F 2047°C
Softening Point: 2070°K 3266°F 1797°C
Mechanical Properties:
Hardness: 9 Mohs 2500-3000 Vickers 1800-2200 Knoops
Optical Properties:
Transmission: Visible Light >> Excellent
*Specs. obatined from Stettler Saphir Tech Info Library
Link đọc thấy rất thú vị và chi tiết về kính sapphire này: http://www.pmwf.com/cgi-bin/ForumArchive/webbbs_config.cgi?noframes;read=273655
thêm tý nữa ạ
Sapphire crystals are composed of Corundum. In the early 1960's, they were being used for ladies watches and were faceted. These were used in very small faced ladies watches and were very expensive to produce.
In the early to mid 1980's, sapphire crystals were beginning to be offered more for men's watches. I was one of the first to use sapphire crystals in about 1983 or so. Subsequently, Rolex began using sapphire crystals in the mid to late 1980's. On a further note, I use thick contoured sapphire crystals which cost about 3.5 times more than flat sapphire crystals. Many companies producing watches that cost thousands more than mine use flat sapphire crystals as a cost cutting method.
Sapphire crystals are currently the best and most durable material available for watch crystals. They are synthetically made and rate 9 on the Moh's scale of hardness. The only thing harder, and capable of scratching a sapphire crystal, is a diamond which rates a 10 on the Moh's scale of hardness. Synthetic Sapphire (AL2O3), is produced from aluminum oxide. It is much less expensive than natural sapphire but is absolutely identical regarding structure, properties, and quality.
Here are some of the technical characteristics of Sapphire Crystal:*
Physical Properties:
Crystalline Structure: Rhomboedral hexagonal single crystal
Density: 3.98 gm/cm3
Composition: AL2O3
Thermal Properties:
Melting Point: 2320°K 3716°F 2047°C
Softening Point: 2070°K 3266°F 1797°C
Mechanical Properties:
Hardness: 9 Mohs 2500-3000 Vickers 1800-2200 Knoops
Optical Properties:
Transmission: Visible Light >> Excellent
*Specs. obatined from Stettler Saphir Tech Info Library
Link đọc thấy rất thú vị và chi tiết về kính sapphire này: http://www.pmwf.com/cgi-bin/ForumArchive/webbbs_config.cgi?noframes;read=273655
Thank mod nhé
Biết thêm được mấy kiến thức lý thú=D>
cho em hỏi câu ngoài lề tí: em thấy các đồng hồ chính hãng cùng model, chỉ khác mặt kính sapphire hoặc không mà giá chênh lệch nhau từ vài chục đến cả trăm $. Vậy mà mấy cái đồng hồ nhái TQ 100k vẫn có mặt kính sapphire, đã test cà không trầy. Vậy mặt kính sapphire đắt hay rẻ ạ?
Kiếng sarphie rẻ thôi . Nhưng hình như độ trong và độ bóng của kiếng quyết định giá trị của cái kiếng
Em đang đeo 1 cái đồng hồ mặt kính saphire đc tặng từ năm 1997 đến giờ hiệu Olym Piamus, em kg rành đồng hồ, nhìn hiệu lạ quá mà xài bền thật, bị va quẹt, cạ ầm ầm mà vẫn xài tốt. Đã từng thách đố với rất nhiều bạn bè là cho vô tư cà xuống mặt đường hoặc lấy vật nhọn cà thoải mái.
Vấn đề bác hỏi mấy đồng TQ bán giá rẻ theo em đc biết thật chất chỉ là tráng 1 lớp saphire mỏng bên trên thôi, lúc mua bác test thì dĩ nhiên kg trầy, nhưng sử dụng 1 thời gian ngắn sau này thì sẽ bị trầy. Còn đồng hồ mặt kính saphire thiệt thì là nguyên cái kính nó bằng saphire nên sử dụng bao lâu đi nữa vẫn kg trầy.
