How gold of choose and buy
◎ draws out money points for attention
In the bazaar of our country, commonly gold act the role ofing is tasted and handicraft bar announces gold price just consults that day, the real value of commodity depends on greatly the level that machines craft. Because consumer is right the treatment level demand that gold act the role ofing tastes is higher and higher, treatment charge is in the proportion in value of this kind of product is larger and larger also.
In the choose and buy gold act the role ofing is tasted when besides the warehouse choose and buy that wants to assure quality, notice the following item even:
1. should have normal duty Wu bill, indicate the name that gold act the role ofing tastes, quality, weight, so that inquire in the future.
At present gold of shop place carry out acts the role of 2. article take place to produce for Shenzhen, Guangzhou more, the characteristic is design beautiful and novel, easy, but purity is not certain very tall. The gold that Zhejiang produces is acted the role of article, design compares a tradition to change, but contain Troy opposite taller.
3. should microscope enchases gold act the role ofing to taste the gem that go up to whether become loose, adorn article have without burr, act the role of the body that taste catenary flat, clip of agraffe, connect, ear firm. To make position of first class of the connect of the agraffe of hand catenary, dangler, ear firmer, the quality of these place wants some lower.
4. have the aid of detects relevantly tool observation, wait like pen of magnifier, diamond.
5. should have place to detect the calibration certificate of the orgnaization.
6. is produced according to the country taste a standard, due on headgear product quality indicates " pure gold 990* or " 1000 pure gold 999 " impress of manufacturer place bid. Impress of goods of domestic and international gold and mark card have relevant regulation, general requirement has impress of name of manufacturing company code name, material, content to wait, do not have impress for rejected product. But also allow not to make number to a few particularly fine products. The produces a business normally gold that sells in the market now is acted the role of article be in adorn taste the sign that on quarter have material name, quality and company. If indicate punch-drunk, tag not complete or without the mark, criterion this product already belonged to rejected product, answer not to allow to sell.
How to distinguish gold of true and false
◎ true and false is differentiated
The circumstance of the shoddy, mix the false with the genuine with gold vessel long-standing market is relatively common, sum up the method that gave gold of a lot of appraisal inside the industry so, can the method that apply generally among them and goes easily simply reach with a pithy formula: ? ⑹ of Qi Jun of Di of ⒌ of porcelain toad is miscellaneous catch Du of defect extraction ⒖ to take cape of alliance of ⒂ of ァ of summer of of rare ⑹ of ⑻ Lin scrupulously and respectfully G after? of Jing Xin of of Γ of exacting of knock of 8 wood Qi need tool of have the aid of and reagent 3 sentences.
See colour and lustre.
Can distinguish roughly according to the different burnish of gold and color gold of bullion, K, true gold, false gold. Gold jewelry purity is taller, colour and lustre is deeper. Quality shows bare yellow in the gold of 95% above, a bit under of 95% reach quality to be in 80% Jin Chengzheng yellow of the left and right sides, 18K Jin Zechang shows green yellow, contain green to move. In last few years successful already development goes K gold of color, but golden act the role ofing tastes the K that should notice white to act the role of tasted distinction with platinic gold. Pure gold or the golden yellow that 1000 pure gold show brightness, and burnish dazzling of copper.
Weight of weigh in hand. The gold of similar volume and copper, gold is heavier, gold act the role ofing is tasted hold in the palm due in the hand heavy dropping feeling, false gold is acted the role of article become aware ethereally. The proportion of gold is 19.32, all the metal such as overweight silver, copper, lead, zinc, aluminium. The gold that is the same as bulk weighs 40% above than silver, 1.2 times heavier than copper, 6.1 times heavier than aluminium. This law does not apply to gemmy gold to act the role of article.
Try hardness.
Gold hardness is small, quality is high. Be in with pin or fingernail pure gold or the depict on 1000 pure gold is small all can leave a mark, and do not delimit on copper piece. The tooth bites bullion to also can leave a tooth to imprint, into color high gold is acted the role of taste lower than quality softness, contain copper to be jumped over more more hard. 97% above become lubricious gold jewelry, the turn folds 2~3 second hind, the turn folds place occurrence furrow, also call scalelike mark; 95% the gold jewelry of or so quality, the sense when the turn is folded is good, not apparent; 90% controls scalelike mark the gold jewelry of quality, when the turn is folded very hard, contain the gold jewelry with more impurity without scalelike mark; , the turn is folded 3 times two if make a living,break; namely gold is made, the turn is broken namely, section has apparent arenaceous graininess. With the size that headgear should consider when this law and Bao Hou, thick, wide some harder, thin, narrow some softer. When quality jumps over low folding, jump over break easily, and feel is good.
See density.
The density of gold is 19.32g/cm3, one times heavier than be the same as the silver of bulk, lead, stannum the left and right sides. Can you use formulary: ? Joyous ɑ making the same score colourful of fish hawk endowment to be troubled by persimmon?g) is more certain than going up the bulk of gold jewelry (Cm3) is equal to density. Beg a thickness that measures gold jewelry, density is bullion for 19.32g/cm3 left and right sides or relatively bullion, the gold that be blame bullion namely otherwise or differs into color (this law does not have any ruinous) to headgear.
Hear phonic musical sound.
When into color tall gold jewelry accepts beat or throwing toward firm ground, piece " Da, Da " depressing in a low voice, without the echo, and do not have flexibility, without Jin Youyin of; K of phonic musical sound charm, phonic, resilient, bounce jumps over musical sound of big, sound to jump over a needle to jump over better, quality is poorer.
Grind on stone.
With touchstone appraisal quality. Wear jewelry be tryinged on touchstone, pass comparative color, define gold jewelry quality. This law should be mixed in natural light undertake below fluorescent lamp, cannot undertake below point-blank sun's rays line and incandescent lamp.
With acerbity dot.
Choose the black touchstone with exquisite quality of a material, with the standard assaying that contains Troy to differ piece (to gold) in trace of the lay off on touchstone, the gold that wants place identification again acts the role of sample to be on same touchstone nick, with vitreous club the place tries nitric acid to be in gold on the road, on drop impurity of take out of thick nitric acid, the assaying that finds out the mark that leaves on touchstone and place to delimit piece the trace is comparative, find out with act the role of the chroma like tasting sample, to tasting golden standard to spend all the same, what should measure deposit to act the role of sample for place namely is accurate contain Troy. Because golden element chemistry is stable, do not react with acid, reason color is changeless. If not gold or blame bullion, jin Daoze disappears or have change. Metabolic rule is " 3 fast, 3 slow " , disappear lowly into color namely fast, quality disappears high slow; mixes gold to disappear fast, does clear gold disappear slow: ? of Yu of Э of of Jian of gourd ladle Yi " of of Yi Jian ?
With baked wheaten cake.
Act the role of with what fire will differentiate article burn red (do not make act the role of article fused be out of shape) , color of the observation after refrigeration changes, if the surface still shows original gold colour and lustre,be bullion; is like color to pale or different level blackens, not be bullion. General quality is lower, color is thicker, blacken entirely, the specification is false golden act the role ofing is tasted.
Current, spectrometry of X ray fluorescence is used generally to undertake nondestructive detects in inspection agency, its accuracy is taller, the error is minor, measure time shorter, measure range wide. In convention main effect is produced in detecting. Gold jewelry can be divided from value for 3 archives, namely high-grade, intermediate and cheap. Headgear of high-grade precious metal is to use gold of alloy of K platinic gold, tall K, pure gold to be made. Outside dividing pure gold headgear, enchase the pearl with opal, ruby, sapphirine, emerald, amber stone and good quality of a material, diamond to wait.
Teach your naked eye how to discern gold true and false
Appraisal of gold the purity of gold or silver " small a pithy formula "
People discovers in long-term practice, the gold of all sorts of different quality, its color and burnish are each are not identical, pass long-term observation analysis, summary gave gold (clear lubricious gold) quality a pithy formula one by one " bare of 7 blueness, 8 yellow, 9 belts (or 9 bare) , 46 do not show gold "
7 blueness are to point to 7 into content (the gold place of the 70% ) that contain gold presents the color that come out to be green yellow.
8 fizzling out is to point to most probably content (the gold place of the 80%) that contain gold presents the color that come out to be yellow.
9 belts bare is to point to 9 into content (the gold place of the 90%) that contain gold presents the color that come out to be bare gold.
46 showing gold is to point to quality under 6 into (the gold place that contains 60%) presents the color that come out already was not the color that gold place has, 4 into above and 6 take small yellow for Bai Zhong into the following Huang Quan, 4 into the following gold, its color floats completely white.
Judge the quality of gold according to the color of gold, burnish, it is appraisal gold the purity of gold or silver is reliable and simple method.
Above is how choose and buy and gold of divisional true and false, teach your naked eye how to discern the article of gold true and false, greeting dot assist, share and collect!
Bid farewell "
