Method
One, bogus of silver-colored qualitative differentiate. Discern the true and false of silver dollar, above all from differentiate since the true hypothesis with qualitative silver. Silver-colored atomic number 47, elemental symbol Ag, oxidize not easily, flexible good. True Yin Guangze is downy, embellish white. Silver the percentage of gold or silver in a coin jumps over Gaojize to spend whiter, after true silver dollar is cleaned snow-white take a person. Silver dollar hardness is low, photograph of two silver dollar folds attrition, have fat profit feeling, do not hear voice of metallic knock against (foreign silver or scraggly silver except) . False silver dollar or iron and steel do embryo, or cupreous lead does embryo, or aluminous stannum does embryo, or synthesis of metallic powder cement does embryo, its chroma slants dark, lacklustre. After false silver dollar uses baked wheaten cake " ugly performance " 100, have rupture, metabolic, medicinal powder change, baked wheaten cake of true silver dollar is changeless form, changeless sound, after cleaning snow-white have light. The extensive after false silver dollar is cleaned blueness of yellow, extensive, extensive black or extensive is grey. Discern silver is the premise that collects silver dollar character. [7]
2, listen to phonic differentiate bogus. With big toe and forefinger two fingernail needle is opposite calorie of silver dollar center, or hold silver dollar in the palm with middle finger mid, bump with another silver dollar, sound clear musical sound is downy is true silver dollar. Sound needle is tall is iron and steel makes embryo false coin, cracked is cupreous tin alloy makes embryo false coin, sound is depressing is " the silver-colored stuffed that include copper " false coin, breathed is false coin of embryo of synthesis of metallic powder cement. Method of traditional in the past appraisal silver dollar is with big toe and forefinger two fingernail pointed clutch stays in silver dollar center, blow suddenly forcibly, what can hear news of slight musical sound is true silver dollar, those who do not have charm sound is false silver dollar. This kind of method is it is good to want hearing, 2 it is finger of avoid by all means and silver dollar interface too big, 3 it is to want to be blown suddenly listen quickly. Listening to phonic differentiate bogus is the foundation that identifies silver dollar.
3, bogus of the differentiate that wrap an oar. Surface of silver dollar of be handed down from ancient times has an oxidation silver, it is the bag thick liquid that people often says. Bag oar basically has shallow black, grayish, shallow orange and millet housing quality. The bag oar that brushs besmear and candle fire barbecue to come out with shoeshine presents heavy black, know. Identify bag oar is the effective method that identifies silver dollar.
4, bogus of rubiginous lubricious differentiate. Silver dollar stops current hind, deposit undeserved meeting to rust. Layer of rust of silver dollar of be handed down from ancient times is very thin, show blackish green scene. Come up out of land silver dollar becomes rusty commonly the layer is thicker, local rust layer is raised. Two silver dollar become rusty together, after knock leaves, the surface has distributing not the white window of divide evenly, receive light and inspect glisten, common says " extensive is silver-colored " , extensive silver is seemed now cannot of fake. Be buried with the dead comes up out of land sauce of extensive of silver dollar majority is gules, local have green rusty spot. Puddle silver dollar connects body extensive patina. The rubiginous color of true silver dollar is historical brand, very difficult take out, be boiled with buck boil and do not retreat. The rust with false artificial and feigned silver dollar is shown virescent, use fingernail to be able to scrape, with pinprick above but erect do not fall, boil half hours to become rusty with buck boil color is devoid. The rust of false silver dollar is heard with nose have fishy smell, lick with the tongue have tart flavor. Bogus of rubiginous lubricious differentiate is the key that identifies silver dollar. 5, bogus of edge tine argue. Level off of the tine side true money, size is consistent, age deep depth agrees; False coin edge ages criterion not carefully and nearly, depth is differ, the edge ages askew.
6, weight argue bogus. Standard of true money weight should be in 26.86 grams, but wear away to also should achieve 26.5 grams through hundred years current generation, but Yuan Da head is overcome in 26.5~26.6 commonly. Material of a few rough-wrought false coin and blame silver often are met character under 26.5 grams a lot of.
As a result of " Yuan Da head " get those who collect the market approbate gradually, because this theres is no lack of numerous the person that make a holiday is forged for angle interest or counterfeit " Yuan Da head " , the person that many collecting is not careful for " Yuan Da head " and muddleheaded was become " loss is big " . Coin of deputy curator of museum of former China coin, China learns deputy secretary-general Yao Shuo civilian offerred for us a few differentiate " Yuan Da head " the skill of true bogus:
The first kind of method is " knock "
Take two silver, the finger tip that uses both hands holds the center of a silver in the palm each, draw close slowly, when two silver coincide when the position of about 1/4, make two silver gently knock each other brim, the sound that true money gives out is ringing, counterfeit money sound listens will send wood.
The 2nd kind of method is " blow "
Hold silver dollar gently with forefinger and thumb in the middle of heart, by the side of the vertical stroke that plays silver dollar suddenly, put quickly to the side of ear to listen, good silver end news is long and true quality is crystal, and of pure silver of other metal or blame won't have such end news, the fill lead silver with for instance common market rings scarcely, because lead is heavier softer, shake pronunciation not easily. Counterfeiter uses computer plate making mostly, pretend to be silver character with alloy material, its color, article pursues a few but look genuine, but eventually because not be silver-colored, its articulate the needle grows, adept person discerns know true bogus.
The 3rd kind of method is " say "
True currency is common lumping weight, also control in 26.5 grams through current loss, its color moist is soft white, tonal soft chart of long, article the accurate, nature that wrap an oar; General inadequacy weighs counterfeit money, or add substantially thick bring about overweight, and color is gloomy. But from the silver that in recent years useful true Yin Fang makes arrives before liberation, some are better than the craft of true money.
The 4th kind of method is chemically analysis careful with, cause packet of oar easily to destroy in the place that does not have design, nod one droplet nitric acid, the metal that can see nitric acid and silver are medium immediately produces chemical reaction, the chemical combination that makes the other metal such as silver of khaki nitric acid is sedimentary. The soft data that uses mercery next obliterates chemical reaction is sedimentary, you still can see the face of silvery white, this kind of experiment won't harm the integral structure of silver, go easily simply. Of the metallic composition because of metallic money form impure, the color change of its chemistry reactant is bigger also, if be false coin, can pass the color of chemical reactant, will judge the true bogus that gives silver. For example:
1, the meeting with silver-gilt very quick layer and nitric acid undertake the micron of silver of cupreous embryo plating chemical reaction, next, expect with cupreous base material proceed chemistry reacts again, after final chemical reaction is finished, can present the metal such as the nitric acid silver that gives reseda and nitric acid copper mix sedimentary. Rub-up changes the place color after learning reaction, its are silvery white no longer, however the cupreous base material of buff is qualitative.
2, alloy material silver not false silver of argentiferous alloy material, after using nitric acid chemical analysis, its sedimentary color is thick white gray substance.
3, if use the false silver that stannum and plumbic material make, the chemical reactant of the metal such as stannum of its nitric acid and nitric acid lead is the precipitation material of white gray.
Pass the color of chemical reactant, can the true and false that differentiate gives silver. The false silver of other data is usable afore-mentioned 3 kinds of methods undertake test and verify.
Subtle move
Hear voice
Use silver dollar to bump the sound that give out to discern each other namely. Withstand gently up with a finger tip in the center of silver dollar, bump the brim place of this silver dollar with another silver dollar, the voice that give out is small fragile, downy, it is true silver dollar. If hair is pointed and voice is loud, contain cupreous sound, it is to contain the small part false silver dollar with very much copper. If low and voice is hoarse, periphery is abhorrent, it is the false silver dollar of wrapping, mend by replacing a damaged part. The sound most needle of general false silver dollar is short and low frowsty. Treat an external form
See appearance structure, it is normal that the attention observes the color of silver dollar, decorative pattern, design, size, thickness to wait, the trace that does not have edge of course pickling, file, wrapping, mend by replacing a damaged part is reached whether the abnormal phenomenon such as illicit edition silver dollar, generally speaking somes the diameter of false silver dollar is a bit smaller than true silver dollar, the false silver dollar that should use coequal volume only and true silver dollar are compared, can differentiate gives true bogus.
Check edge ages
Because true silver dollar is machine plate making? The tine side its is meticulous and well-balanced, neat equalize; The tine side false coin is coarse, uneven, some still has local the mark that writes file. As long as attentive, of naked eye or easier resolution. Is if is true " Yuan big, a serration in two of the tine side head " thick tine? And the serration of false " Yuan is big " is punch-drunk.
Weigh weight
The standard weight of silver dollar should be 26.8 grams, quality 89.1% . Normal silver dollar course is current after wearing away, weight also should achieve 25.8 grams. Always weight under the 25 grams, quantity that contain silver under 80% , the official that is not at that time is built, wash silver dollar of edge of edition, file, wrapping, mend by replacing a damaged part, it is false coin.
Acid examines
In a nitric acid, if discover,blacken, it is composition inadequacy or false silver dollar. And cupreous core silver dollar wants only it is to touch nitric acid, can lose luster. So silver-gilt, silver-gilt surface layer falls off very easily, and fall off to rust extremely easily partly.
Anyhow, want much study to pass form make, the true and false that color of bag oar, font, rust will come to judge silver, and the edition that identifies silver is fastened. Knock, acid examines wait for a method to be used less as far as possible. Must not bite silver additionally with the tooth, can destroy otherwise article. Specific appraisal method
(one) check weight, quantity dimension (diameter and ply) : A yuan of silver dollar and so 7 money 2 minutes of Long Yang, weight standard is 26.6 grams commonly, current wear away to also answer not less than 25.5 grams, be about to make question mark conversely;
(2) hear voice: True money is touched gently attack, can give out the sound with pure, pleasant mild and indirect, conversely its sound or needle are tall, or acerb and short, or pure tone or low dumb.
(3) argue quality: Folk has " eyeball of silver hair supercilious look is nigrescent " say, true money of that is to say brushs whiter more, glittering and translucent and shiny, exterior and interior is consistent, brush conversely nigrescent, or ashen, or silver-gilt place is made, have a kind of blundering feeling.
(4) see grain act the role ofing: True money is steel mould is become by machine punch, word design is pure and fresh, fluent and natural, dragon scale is meticulous in a subtle way, figure brow mustache, double-fold eyelid is very clear, conversely design is punch-drunk, messy and rough whole.
(5) examine edge window: True currency course is current, although some wear away,the edge ages, but pitch whole equalize; Nature is fluent and fruity, conversely edge tine is curt, not quite orderly, accident is differ, have shallow deep sense.
(6) the oar that remember a bag: Silver dollar is in current or store up the surface in the process can leave a kind idiosyncratic, make wrap an oar, name black lacquer is ancient, it has natural beauty namely, have the history again a thing of past beautiful, conversely copy money often is baked with smoke or black shoeshine, the daub such as black mud, look factitious, still have peculiar smell, very easy erase.
(7) the face that feel money: True money is tight level off, without pore, have downy feeling conversely much sand holes, pore layout appears coarse, below magnifier money side has raised granule state. Anyhow, our country silver dollar collects investment, appreciation space is larger, it has already collect value, again the history studies value, but in the process that collecting silver dollar, ten million should raise vigilance, can be found everywhere because of the person that make a holiday currently, impossible to defend effectively, hope so a few friends that experience silver dollar collects a domain first, want us to observe carefully only, increase discern ability, "The road is high one feet, evil spirit is high one a unit of length " . Such we won't be deceived. Also can collect at the same time taste really.
