"Color" and "pulp", has always been the core and focus of the debate in the circle of playing walnuts. For an old player, with the disc of nuclear time, there are two changes is greater, one is the color change, and then a change in the feel. And this change in feel all comes from the walnut on the pulp.

So, what is the pulp? How is it formed?

1

Principle of pulp:

Pulp, as the name suggests: wrapped in a layer of pulp. The definition of this word is very accurate, playing walnut pulp, indeed, from the surface of this layer of pulp gradually evolved. So what is the source of this layer of "pulp"? This is to understand the composition of human palm secretion from the beginning.

2

Composition of palm secretions:

The skin on the human hand secretes two substances: sweat and sebum. Sweat is secreted by the small sweat glands, and for the coloring of the cultural walnut, sweat plays a dominant role. Sebum is secreted by the sebaceous glands, and it is a mixture that contains a variety of lipids.

Sebum is excreted to the surface of the skin, part of the hair attached to the hair, the role of moisturizing the hair; the other most of the sebum and sweat mixed in the palm of the skin surface to form a layer of milky sebum film, this material is the predecessor of the package "pulp".

3

Pulp and wood fusion evolutionary process:

Milky sebum film because it contains lipids and waxes, its own both "oil" and "wax" properties, in contact with the wood of white stubble walnut, it will quickly penetrate into the wood fiber. When contacting the wood of white stubble walnuts, it will quickly penetrate into the wood fiber, and this process will last for more than a month. During this time, the walnut will feel fast discoloration and strong absorption. Always feel astringent, the jargon called "bite". After this stage, the creamy sebum membrane and wood fiber by the filler will further contraction, which is following the new walnuts under the tree shade dry process after the further shrinkage. Generally according to the different walnut head shrinkage ratio is not the same.

For example, the leather is good side 40 white lion, under the tree shade drying a month will shrink to the side of 39 or so, color half a year later will shrink 0.3 ~ 0.5mm. and so on, the larger the shrinkage of the more powerful, the worse the leather shrinkage of the more serious. With the gradual evaporation of the mixture of water, creamy sebaceous membrane is reduced to a mixture of cortex, in which a variety of lipids into the deep wood, further fusion with the wood fibers, and the other part of the wax mixture precipitated to the walnut surface layer pile down, solidified into a transparent pulp layer similar to the crystals, which is commonly referred to as the "pulp".

From the walnut into the hand to play a few months to a few years, walnut pulp will become deeper and deeper, the area will also be with the walnut surface wear and increase. Deep into the wood of the deep constituents because most of the lipids, so show "oil" characteristics, will be accompanied by "respiration" deep into the walnut, into the walnut cavity, and walnut kernel encounter.

If the walnut kernel happens to be in the state of internal moisture emanation clean, encountered the lipid material will be quickly mingled with it, the kernel in the oil continues to ooze out, with the disk kneading and rotating process all over the surface of the inner cavity, but also by the "respiratory effect" of the impact of the reverse outward penetration, and further complete, perfect the lipid material with the The fusion of lipids and wood, quietly changing the composition of the wood.

4

Wen play walnut "respiration":

"Respiration" is not the walnut is really breathing, intended to make the walnut friends through this image of the metaphorical approach to a better and faster understanding of the principles. the principle.

When the surface of the walnut is gradually wrapped by the pulp, the holes in the wood fiber are filled with sebum mixture, forming a layer of partition. In the process of coiling and playing, the heat of the human hand is transferred to the walnut, so that the temperature of the walnut gradually rises from the outside to the inside. According to the principle of thermal expansion and contraction, when the temperature of the walnut's inner cavity is lower than that of the outer wall, the shell produces a "negative pressure" on the inner cavity, which is a "suction" effect that helps the material inside the cavity (including the oil of the walnut kernel, and other mixtures) to seep out in a better way.

When the walnut is played for a number of hours, placed aside, with the gradual cooling of the wood, the temperature of the inner cavity is higher than the cortex wood layer, which produces a "positive pressure", into the "call" role of time. In this process will be with the lowering of the temperature of the inner cavity there is an inward pulling force, to help the shell wood fiber lipid mixture to the inward penetration.

So, when playing with walnuts, like each walnut in the hands of continuous play 2 ~ 4 hours, during which it is best to adhere to the walnut does not leave the hand. To be the walnuts all plate hot after the walnuts placed in a drawer or a cool dry place, set aside for more than 10 hours. Let the walnuts complete every "breathing" process.

5

What is hanging porcelain?

Bring a pair of old walnuts, the body of the pulp warm and moist as jade, cool to the touch. Touch each other when issued a crisp, bright sound, such as two porcelain touch. This state of the old walnut, known as hanging porcelain walnut. Hanging porcelain, as an upgraded version of the pulp, its conversion process is what kind of?

As a sebaceous mixture of wax-like substances precipitated in the crystallization, the physical state of the pulp still has a great deal of instability. Initial mortar, in the process of further play, the newly added milky sebum film will gradually soften the mortar, the walnut surface will feel "sticky", "greasy", which is a normal phenomenon. With the passage of time, the walnut surface texture gradually wear, the palm of the hand can touch the surface area increases, the surface of the wax precipitation also with the long years of disk play continue to experience extrusion - & gt; solidification - & gt; extrusion - & gt; solidification process. Intermolecular moisture is gradually lost, the degree of solidification intensified, the whole walnut body pulp, the depth of the degree of "three points into the wood" point. At this time the walnut, can be called "hanging porcelain walnut".

Hanging porcelain can be regarded as a hardened pulp, which is fundamentally different from the state of pulp is that hanging porcelain is more stable, will not be softened by the addition of a new creamy sebum film.

Based on the amount of sweat and sebum secreted by the skin of the palm of the hand, the skin type is also divided into several kinds of different skin type playing out of the walnut hanging porcelain state is also different.

(1) neutral hand

This type of palm sweat, sebum secretion is appropriate, creamy sebaceous membrane of sebum and moisture balance, skin type is very healthy, between dry and sweaty hands. Pan play out of the walnut color red, pulp transparent, is the palm of the hand can play out fine walnuts.

(2) dry hands

These palms do not like sweat, sebaceous gland secretion is also less, playing walnuts on the color and pulp are very slow, but as long as you insist on it can still be achieved. The same pair of children walnuts, playing walnuts until the degree of hanging porcelain time is several times the neutral hand, but with more oily pig bristle brush can effectively deal with this problem.

(3) sweaty hands

Palm secretion of sweat, but the sebaceous gland secretion is small, the skin can not lock the moisture, part of the population manifested as a slight skin phenomenon. This kind of palm playing walnut initial color fast, playing a week than dry hand playing a month on the color is heavy. But the pulp speed is very slow, and some even walnuts are red and not pulp. This kind of palm playing out of the walnut tends to color heavier, excluding the walnut cortex is not good, the same quality of walnuts sweat hand playing out of the color hair darker, the pulp layer of poor translucency, hanging porcelain is not obvious.

But it is not impossible to solve, such as wearing gloves plate or use no oily nano-brush neutralization can be disk red disk through .

(4) oil sweaty hands (sebaceous hands)

Palm secretion of sweat less, sebum secretion is large, the palm of the hand always feel greasy, milky sebaceous membrane because of the high sebum content of acidic. Under the same circumstances playing walnuts on the color slower, often thick pulp is still yellow. Hanging porcelain after the good degree of transparency, this kind of palm play out of the old walnuts in the sunlight some can even feel the walnuts play transparent. It is a good hand to play walnuts, is a lot of collectors are chasing the art of fine art. Has the "hand of God" title! You are the walnut Maradona ah!

For real players, playing walnuts is the most important process of cultivating the body and mind, what type of palm is given by parents, in fact, there is no need to play walnuts because of the skin type is not good on the loss of confidence. As long as the heart to play, their walnuts can be colorful.