After a lot of friends to buy construction lights lamp，There may be a new hand、After a period of time may also be a "accessible" and "small crack" on glaze – Called”Opening film”。Many friends do not understand at this point tend to be shouted out："Wanla，I fooled friends，I'm getting the fake build light? How to build my light will crack? " Nowadays，In this small series of mind to answer questions for everyone。
one、Opening film is not flawed?
To talk about this issue，Let's first understand what is under the opening piece：Cracking open a natural phenomenon of this piece is glazed porcelain。There are two reasons for cracking：One blank extends in a certain direction mud molding，Effect of the arrangement of molecules；Second billet、Glaze different coefficients of expansion，After firing the glaze layer large shrinkage upon cooling。
The shrinkage should have lights built around% 20%，The reason is that shrinkage as well as expansion and glaze is not the same。Built light tires is very high iron content of pottery tire，Calcium-based enamel iron crystalline glaze。Reasons causing substantially larger than the opening piece Modern porcelain。
Read the opening piece defined above，I do not know if you have no answer for the question of the title of it? We are called to build light black porcelain，Belong porcelain，The opening film as a porcelain glaze cracking phenomenon of nature，It is a feature porcelain。If no porcelain features，That also what is called porcelain?
and，There are a lot of friends like light and removed the piece "red line" to compare。"Red line" refers to a crack formed by an external force porcelain，It has affected the integrity of the porcelain，And the opening piece is essentially different。simply say，Opening film does not affect the integrity of porcelain，That matrix is complete，There have been a lot more open to build light sheet，But it will increase the beauty and charm of light。
At last，Conclusion：Built cup opening piece，It does not belong to defect，It does not affect the integrity of artifacts，not only，Even opposite，It will increase the beauty and charm to build light。
two、How long built light opening film will be?
Built cup opening piece appeared uncertain time。Some lights have opened new film，Some use of the process will be open piece。
Crystallization light glazed building belonging to the glaze，Vitreous glaze layer is relatively thin surface，And we start construction after the full bloom of hot tea cup，Frequently used，That is also frequent thermal expansion and contraction，Opening film more normal。not to mention，Black porcelain lamp built，As the light or under the sun，He looked particularly evident。
three、How to properly appreciate the opening film?
We buyJIAN BEACONBe prepared before，Some of those features and build symbiotic process light，We have a tolerant attitude。For example, some opening film、Small pores、Hyun enamel etc.。If you do not have this tolerant attitude，I think it is better not to buy construction lights。
People master the law of the opening piece of the system out of the opening piece enamel，Become a special decorative porcelain。Yu Song、official、Such products have Geyao。Also known as the crack opening piece of ice，Eel blood can be divided by color、Gold wire、Light yellow roe pattern；It can be divided according to the shape of the mesh-shaped pattern、Mei pattern、Fine grain and so on。For the purposes of construction of light，Sheet is randomly generated open，Some have a kiln，Some occur during use，These are the norm，Play lights have this knowledge，To accommodate，Do not parrot、Many rumors。
At last，Speak a little more，Whether opening film、Or crossed the line，New light、Old lamp may have，These are not absolute evidence as a judgment of old and new construction of light ~
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