Be afraid on coin market trade most silver dollar is counted " Yuan Da head " . As a result of common edition " Yuan Da head " cast the ground amount of much, casting is large, and the amount that live a life is large also, it is so in numerous silver dollar, common edition " Yuan Da head " the value is relatively inferior. But those who need an attention is, in recent years as collect the market more and more active, false silver dollar is much also rise, if do not take care, bought probably " Yuan Da head " hind, him person that collect became loss is big. But false coin eventually is false coin, the also has it very much again weak point that make. So how to discern true and false of silver dollar of Yuan Da head, basically have the following sides: Hear voice, see appearance, produce the expected result tine edge, weigh weight, calm quality.
Yuan is big true and false discerns method one: Hear voice. This is the main method of silver dollar appraisal. Every becomes kind of high silver dollar, sound is general downier and euphonic. Inadequacy becomes lubricious silver dollar, because contain copper the volume is high, manner is hoarse, short and cloudy. Tall or long needle of sound of false silver dollar is low frowsty. Hearing voice is to lean " knock " , hold the center of silver dollar gently with needle of left hand big toe and middle finger needle, hold knock of another silver dollar with the right hand its brim, listen to its sound to have identification, first abnormal come with doubtful silver dollar winkle, differentiate all right again. 2 it is to rely on to touch, take with the right hand a certain quantity of (8 control to 25) silver dollar, be down 45 ° inclined slippery to left hand, hear the voice that its collision gives out, combine design, decorative pattern to come appraisal.
Yuan is big true and false discerns method 2: Treat an external form. True money uses the punch with modest pressure, silver Leng Yacheng all sorts of characters, design, decorative pattern, its colour and lustre is bright and natural, depth of grain act the role ofing is measurable, brim line degree of finish is even, span also density is consistent. The subtle place clarity such as silk of figure, hair, beard, Sui Mang has degree, none mixed and disorderly.
Yuan is big true and false discerns method 3: Check edge ages. Because true silver dollar is machine plate making? The tine side its is meticulous and well-balanced, neat the tine side equalize; false coin is coarse, uneven, some still has local the mark that writes file. As long as attentive, of naked eye or easier resolution. Be like really " Yuan Da head " is there a serration in two when the edge ages thick tine? And false " Yuan Da head " serration is punch-drunk.
Yuan is big true and false discerns method 4: Weigh weight. The standard weight of silver dollar should be 26.5 grams, quality 88% . Normal silver dollar course is current after wearing away, weight also should achieve 25.8 grams. Always weight under 25.8 grams, quality under of 84% , not be to wash silver dollar of edge of edition, file, wrapping, mend by replacing a damaged part, it is false coin. Same breed, edition is other silver, its quality won't differ 1 gram.
Yuan is big true and false discerns method 5: Decide quality. Have quality identification to according with the silver dollar of silver dollar standard. Place of fluid of usable nitric acid tries a way. Wipe a certain place clean first or file a sip of, after the nitric acid on drop, if risk green foam, its quality is not high. Watch its color, become kind of silver dollar in 92% above, its color is basic and changeless. Quality is in of 90% , its color fizzles out for skin or show beige. Quality is 80% the left and right sides, darkly of its colour and lustre is Brown. Quality is 70% of the left and right sides, show virescent. Quality is 50% of the left and right sides, can show bottle green.
Additional, in exchanging current use process for a long time ceaselessly as a result of silver, touch via what cross hand, attrition, its tatty part basically is shown in the prominent place of cash put oneself in another's position come, should be natural those who form is smooth and even, tropism of not in the proper way. Accordingly, pack entirely commonly, without wear away, cash put oneself in another's position can decide without the high-grade silver that wraps an oar again for false coin.
Current, the batch that discovers on the market forges silver dollar, basically use copper to the alloy such as nickel is cast and be become, its characteristic each different: Some following the Republic of China 3 years " Yuan Da head " silver design, its color takes cyan for white ash, lacklustre, sound needle is short, some diameters of; of edition of similar and other illicit are smaller than normal silver dollar 1 millimeter left and right sides, important is his quality always fluctuates in 20 grams, returning those who have a few is the false silver dollar that casts with the metal such as copper, lead, stannum, outside and silver-gilt, the domain of false silver dollar that its characteristic casts character for copper is coarse, phonic needle is short and the amount is small, wear the face argent appear more small yellow, quality controls the false silver dollar that; casts with stannum, aluminium for 21 grams, criterion design is ambiguous, qualitative soft inelastic, sound is grave. argent abrasion, the aluminium of; of the gray that it is blueness with qualitative stannum is young black character, quality all is controlled in 20 grams.
Finally, everybody reads this article, with respect to the Yuan Da that takes the picture in article the head discusses, be true false still? Comment area sees
