The novice plays crock, have an accepted quality level it seems that, that is pug needs clean, bright and clean, wish to lifting magnifier a inch inch " of " removal of mines.
Have " only it seems that perfect " ability is had collect value and economic value, now and then see a macula or white spot, a small hole, one place is raised, be being maintained namely is " of " defective goods and lay aside and neglect.
The result of keep the glittering casket and give back the pearls to the seller-show lack of judgment is, you often missed true good pug.
There is white spot on crock, because chemical mud place is made,not be, however micaceous.
True violet arenaceous mud must be contained a few micaceous, its are complete the temperature that vaporization volatilizes is over 1280 ° .
And violet arenaceous optimal and firing temperature is between ° of 1100 ° ~1280 (according to pug different) , expressing remaining mica in crock so is very normal phenomenon.
Manage together, macula also is not a delegate pug is bad, however iron is qualitative. Violet placer deposit belongs to pink arenaceous qualitative deposit cliff, give priority to with silicon, aluminous, iron.
Choosing, in the process making mashed vegetable or fruit such as mud of stale, refine, major iron is chosen character, but the fish that has one share slip through the net after all, arrive when pug fire when constant temperature, phenomenon of frit of occurrence iron oxide black, iron.
" of those subtle " small hole, cant calls " to jump arenaceous " .
Formation reason is very simple, contract in body of the crock when fire namely, there is amortize between arenaceous bead and arenaceous bead, felt force is the smallest bead is then arenaceous be squashed and skip piece.
Will look from this bit, have jump the crock of arenaceous phenomenon is sterling highest grade mostly good arenaceous stuff. To satisfy dilettante person the requirement of good-looking to " " , eliminate jump arenaceous phenomenon, can add cosmetics mud, although won't jump arenaceous, but the character of pug also dropped greatly.
As to " raised " , term explodes for " defect " or " explode child " , " explodes slimy " , it is normally have pure arenaceous bead only or contain the raw ore with arenaceous very high rate violet arenaceous pug contracts in the whole when the fire inside kiln, because of inside and outside pole of difference in temperature changes and scamper cracks some bit more largish particle, particle periphery does not have amortize and explode piece.
This kind of phenomenon can pass control kiln to rise lukewarmly fall speed will lower flaw rate, also can differ phyleticly to be distinguished somewhat according to pug, but great majority moment still cannot prevent this kind of situation.
On put together, can appear these " flaw " , must accord with syncretic plants or a variety of conditions: It is certain to have enough and sterling, pug is in the raw material that the mine makings of arenaceous sex, sieve singles out must be what pure arenaceous bead perhaps contains cosmetics mud when refine enough low.
Spend tall person to violet arenaceous acknowledge, won't reject the flaw that excellent pug appears commonly. The person that acknowledge is not worth is mostly captious, incorrectly relay an erroneous information, offerred to the person that make a holiday convenient
