Small the proposal that writes everybody is, to oneself eyesight self-distrust, have letter with respect to the choice, safer. Of course, this just also is compared and of character " safer " , because of the certificate nowadays, also cannot use up a letter.

Originally the Id that certificate is like jade, so a lot of friends feel, should have letter only with respect to everything is just fine, can be at ease bought.

When buying jade, requirement businessman issue calibration certificate, this is a good convention undoubtedly, just calibration certificate also is not all-purpose, it has its limitation not only, still make a holiday nowadays ceaseless! We look below first, still have what calibration certificate also impracticable thing ~

01, certificate is not all-purpose

Although calibration certificate is a kind of safeguard, nevertheless regrettablly it still has a lot of limitation, have the problem that you care more when jade of many choose and buy, it is certificate to also cannot give you the answer, for instance this at 4 o'clock · :

1, cannot differentiate actor bad

Although taking one the individual's id card,this is like you, the immanent essence that still cannot judge this person however is good it is bad same. If be,with stone of glass, quartz the stuff of and so on of plastic perhaps resin pretends to be jade, calibration certificate can be differentiated easily.

But if be the low end that uses jade,breed is pretended to be, certificate cannot give you the answer, because these jade remain tremolite substantially.

It is to cannot give you this He Tianyu on certificate fat profit has been spent, whether the construction is tight, whiteness can achieve suet white ah wait for such information. Jade after all good, can rely on yourself to experience only, also cannot replace in accurate instrument.

2, cannot differentiate producing area

Many jades can distinguish according to producing area, because producing area is different,this is, form an environment to also have difference, gotten jade quality is different also.

For instance He Tianyu, inside if fractionize, with respect to the distinction of makings having Han, Qinghai makings, Russia makings, Xinjiang makings. Do not pass letter but without giving thought to these, should detecting only is tremolite jade, unified tag " He Tianyu " .

3, cannot detect leather color

To the jade that a few have leather quality, certificate also detects do not come out, be colored, joining together, certificate cannot tell you. If have need, must undertake detecting to leather color alone, issue letter, detect the price is more expensive also.

4, cannot differentiate breed

Certificate is to cannot differentiate of jade breed, for instance the ooze of some and Tian Yu expects, it is true He Tianyu obviously, but because ooze entered a lot of exotic to pledge, cannot issue letter probably. Still have makings of skin of a few deadlocked, Shi Baoyu (bet stone) also be same argument.

And the white jade of the great reputation, give letter very hard also actually! The provincial appraisal orgnaization of Xinjiang is only at present OK appraisal white jade, other is provincial tag He Tianyu only with national level certificate.

02, " get rid of the stale and bring forth the fresh " certificate makes a holiday

Certificate itself has limitation, this is excusable, but the sham bogus that forges certificate to cover commodity kind, this is naked con.

The commonnest on market is to make false letter directly, but after raising vigilance as everybody, false letter is easy also get behind, then undesirable businessman begins ground of cudgel one's brains for get rid of the stale and bring forth the fresh, initiated a few kinds of new-style certificate fraud.

1, website of accessary and false appraisal

In recent years, the occurrence that 2 dimension pile up brings a lot of advantage to our life, then this kind of method also was used to be in certificate builds a holiday to go up. The meeting on these certificate is accessary code of a 2 dimension, say this is the government-owned net of authoritative appraisal orgnaization, scanning enters the true bogus that can inquire certificate in government-owned net.

But in fact, since iron the heart should cheat you, give you impossibly of course network of appraisal orgnaization official really!

These 2 dimension are piled up connective resembles extremely the false join of government-owned net, the website that turns to cheater to forge jumps directly after scanning. What these websites still do is lifelike, it is join of page layout, webpage no matter, the reach every aspect of a matter that becomes.

The domain name of △ true website is Pkugac.com, the domain name of false website is Pukgac.com, ku displacement ordinal, make it Uk

2, cover a shop sign: True certificate matchs fake

This kind of method is similar leopard cat changes prince, although be true,be calibration certificate, but the jade objective that matchs however not conform to, resemble covering card car same.

This kind of practice is to use a natural jade first, send appraisal center to issue a normal calibration certificate, next the false jade of resemblance of surface of reoccupy and this natural jade, come perpetrate a fraud, deserve to use this normal calibration certificate, cheat customer with this.

Pursue than as above this halcyon bracelet, when reading letter, unusual without discovery, but contrast carefully bracelet, discovery not only weight is not accorded with, color distributings, appearance and size, also put in certain difference, this bracelet that match is emerald B goods at all, taste really early was changed!

3, the foreign language letter that you read not to understand

This kind of certificate basically goes out to go out now when travelling, some friends like to go to jade country of origin try one's luck, hope can conveniently collects a leakage.

These imprinting full the certificate of foreign language looks lofty on, but you look,understand? If you look not to understand at all, how to conclude it is really false again?

So, may not of foreign language certificate is false, but below the condition that treats not to understand, still do not have blind faith in it, fooled odds will be greatly elevatory.

03, the 5 element with essential calibration certificate

1, imprint organic compose aptitude

The most important on certificate, it is to must imprint attestation of organic compose aptitude, basically have 4 kinds: CAL attestation, CMA attestation, CNAS attestation, ILAC-MRA attestation.

Among them CMA is a country the compulsive attestation to appraisal orgnaization, common feature says, this is most fundamental attestation. If do not have even CMA attestation on certificate, so this certificate is very not accurate, fluky.

In the opposite of certificate, still ought to imprint the information such as phone of the name that has this appraisal orgnaization, connection, address, network address, convenient consumer inquires.

2, examine the autograph of personnel

The sign one's name of the member that have identifier wants on certificate, and jural specific provision, so if appraisal orgnaization knows imitation holiday, need to assume joint liability. So on certificate detect personnel full name, reinspect a person (person of examine and verify) autograph is to fulfil responsibility the individual, appear in case make a holiday.

3, content is more comprehensive, detailed

The most important information on calibration certificate, still detect of course content. The jade gem of different sort, information also has each emphasize particularly on: For instance diamond classifications certificate basically pays close attention to 4C grade: Color level, clean the degree of level, level that cut worker worker, weight. And jade certificate pays attention to physical property more, examine conclusion.

The emerald certificate with △ detailed content

These △ certificate are a problem great, lack important information

Such △ certificate does not have public letter force completely, because besides emerald weight, not other any data

4, certificate number and desired result code

Certificate number is only sex number, it is to go to the lavatory undertake those who retrieve calibration certificate inquiry is mixed. Desired result code is inquiry and the identification code that when retrieving, use. Calibration certificate can inquire really through the network, must be nevertheless go in normal Guan Wangcai.

5, the project all is the machine is printed

To the calibration certificate of gem jade, the country asks compulsively must be the machine is printed, besides autograph, the calibration certificate that fills in by hand does not have any referenced value.