Two, distinguish the quality of crystal
1. Touch, the high-grade crystal has sharp edges and corners, and the middle and low-grade crystals feel very smooth;
2. Anti-counterfeiting mark;
3. Count, 224 facets of high-grade crystal cut surface, 120 facets for Egyptian and domestic products;
4. See if the corners are aligned, the corners of the cutting surface of the high-end crystal ball are very aligned, and the deviation between Egypt and domestic products cannot be aligned. Look at the hole position, high-end, refined, uniform, smooth, and neat, other brands have uneven sizes and rough surfaces. Whether the transparency and refraction are strong;
5. Weigh the weight. The high-grade lead content is more than 30%, the high-grade hand feels heavy, and the low-grade hand feels light.
Three, crystal knowledge
1. The main chemical composition of crystal: silicon dioxide
2. The refractive index of the crystal depends on the content of lead oxide (≤33% for Swarovski balls, ≤32% for Egyptian balls, ≤22%~31% for domestic first-class balls, ≤8%~18% for Domestic secondary ball) contains more lead oxide, its luster and color are richer, and the weight is heavier.
3. The higher the purity of the crystal, there are no bubbles, water ripples and impurities in the crystal, and it is crystal clear and transparent, which can exert the best optical performance, so that the passing light will refract the magnificent color and uniformity and concentration. The complexion spectrum (rainbow).
4. High-quality crystal products will use leaded crystals. Lead oxide is no less than 30%. It is a pure raw material that can emit sparkling and bright colors.
5. The world's first crystal glass chandelier was born in France, the 'Romantic Capital'
6. Currently imported crystals are mainly produced in Austria and Egypt. (Now the industry is distinguished according to the standard of lead content)
7. The Austrian Swarovski brand is the best crystal lamp brand at present, and another Swarovski brand is Strauss. SPECTR crystal accessories Swarovski's high-quality products.
8. Swarovski has been a world-renowned manufacturer of cut crystals since 1895.
9. Crystal origin: 1) Domestic: mainly concentrated in Zhejiang, high boron glass tubes are produced in Yancheng and Wuxi, Jiangsu.
12. The commonly used crystal balls are mostly 40# and 30# balls, the commonly used crystal wind blades are mostly 3 inches, 2.5 inches, 2 inches, 1.5 inches, the commonly used crystal octagonal beads are mostly 14#, and the commonly used crystal pineapple beads are 10 #,8#.
