建水紫陶的「磨口」是什么意思?

紫陶壶口盖严密不晃动,且转动流畅,已经成为消费者判断一把壶做工好坏的标准之一。

Therefore, the purple pottery with uneven filling position is not a defective product as long as it does not crack and has no serious bulge or depression.

从现在的工艺水平来说,口盖严密且转动流畅已经不是什么难题,因为制壶艺人们已经找到有效的解决办法,那就是磨壶口,专业名词叫做“整口”。

From the current level of technology, tight and smooth rotation of the lid is no longer a problem, because the pot makers have found an effective solution, that is grinding the pot mouth, which is called “whole mouth”.

建水紫陶因为泥料的性质,在烧制时会有较大的收缩率,范围大多在18%~20%。对于茶壶、茶罐这类器物,盖子和罐身分开,在窑内高温下,由于泥料性质、坯体薄厚及器型差异等因素,盖子和罐身的收缩程度会产生差异,有些则会发生轻微变形。

Because of the nature of clay, Jianshui purple pottery has a large shrinkage rate, mostly in the range of 18% ~ 20%. For teapots and jars, the lid is separated from the can body. At high temperature in the kiln, the shrinkage of the lid and the can body will be different due to the properties of the clay, the thickness of the green body and the difference of the shape of the utensils. Some of them will deform slightly.

烧窑是个复杂的变化过程,其中有许多不可控和未知的因素,进窑之前严密的壶盖,烧成后可能不会严密了,如果出现壶盖小于壶口的情况,也就是我们常见的壶盖晃动,那就没有办法再补救啦。非常轻微的晃动,大多数陶友其实可以接受,但如果晃动太多,就只能作为瑕疵品或废品处理啦。

Kiln burning is a complicated process, in which there are many uncontrollable and unknown factors. The tight lid of the pot before entering the kiln may not be tight after firing. If the lid is smaller than the mouth of the pot, which is the common shaking of the lid, there is no way to remedy it. Most Taoyou can accept the slight shaking, but if the shaking is too much, it can only be treated as defective products or waste products.

为了很好的解决这个问题,现在普遍采用的办法是将盖子刻意做得比壶口或罐口大一点,在经过收缩后,有的盖子可以严密地扣在壶口或罐口上,但大多数的盖子还是偏大的。

In order to solve this problem, the commonly used method is to make the lid larger than the mouth of the pot or the mouth of the pot. After contraction, some covers can be tightly fastened on the mouth of the pot or the mouth of the pot, but most of the covers are still too large.

这时就要进行我们前面说的“磨壶口”这道工序了。将高硬度的金刚砂粉末涂抹在口盖处,借助拉坯机的转动,盖子与壶口、罐口互相摩擦,磨掉多余的部位,直到盖子与壶口、罐口严丝合缝地盖子一起。

At this time, we have to carry out the “grinding pot mouth” process. Apply the high hardness emery powder to the mouth cover. With the help of the billet drawing machine, the lid rubs with the mouth of the pot and the mouth of the pot, and grinds off the surplus parts until the lid and the mouth of the pot fit together.

绝大多数的建水紫陶茶壶、茶罐,盖口处都会有明显的整口痕迹。特别是还原烧制的表面黑色的紫陶,口盖处经过摩擦,表面的黑色还原层被磨掉,里面红色的坯体就会显露出来。

The vast majority of Jianshui purple pottery teapots, tea pots, there will be obvious traces of the whole mouth. Especially for the purple pottery with black surface, the black reducing layer on the surface will be worn off after friction at the mouth cover, and the red green body inside will be exposed.

所以,出现口盖处泛红或者颜色与其他部位不同的情况,并不是瑕疵或是什么严重的问题,而是因为几乎每一件紫陶都要经过整口才合格,这也是建水紫陶明显又普遍的特征之一。

Therefore, it is not a defect or a serious problem that the color of the flap is different from that of other parts, but that almost every piece of purple pottery has to pass through the whole mouth, which is one of the obvious and common characteristics of Jianshui purple pottery.

未经允许不得转载:饮茶乎 » 建水紫陶的「磨口」是什么意思?

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