As you know, whether it is bronze, porcelain, wood, jade, purple sandware, etc., over time, its surface will gradually produce a kind of matte, antique line called "natural pulp", because the purple sand pot has a good adsorption capacity, the resulting pulp will be faster and easier than copper, porcelain, jade, good hardwood furniture, due to the lipid content, is also very easy to produce pulp, if copper, porcelain, If it takes 500 years for the production time of jade pulp, then it only takes a few decades for purple sand ware, but for today's purple sand pot practitioners, decades is too long, so there is a special mechanical polishing and "chemical slurry" aging process.
When it comes to the artificial pulp on the surface of the purple sand pot, there have been large-scale production since the end of the eighties, initially with leather shoe polish, later with industrial paraffin, and then with colorless and odorless petroleum jelly, and now with potassium permanganate and liquid ester essence organic matter, so that the purple sand pot with residual temperature from the kiln after some tinkering, immediately became a hundred years ago with a temperature of the "ancient pot", this kind of thing, I named it "chemical slurry purple sand pot" Because this kind of pulp is an artificial organic chemical, just like the cosmetics used by girls, they are applied to the superficial layer of the pot, which is easy to remove, and it can be scalded several times with boiling water, which has no big impact on making tea, and will not affect the health of tea drinkers, so many people are confusing consumers in this way.
The slurry on the surface of the purple sand pot should be a special trace left by the years, it is the makers who used the unique Ming needle process and left a matte effect with the same jade, after years of polishing and baptism, the longer the time, the more obvious the effect of natural slurry, and the contemporary purple sand pot without clear needle kung fu, purely by polishing and then on a layer of organic chemical slurry are opportunistic, is cutting corners, is a deception. So, as a consumer, how do you distinguish between "natural toning" and "chemical toning"?
The first look at the density of the material, the pot with natural slurry, the Ming needle work must be very good and in place, so the material density must be relatively high, and the material of the polished chemical slurry pot is generally loose.
Second, scald with boiling water several times, the natural slurry has a certain water absorption, and the chemical slurry directly hangs the water, and the water absorption rate is obviously much worse, because there will be a thin layer of protective film on the surface as the water absorption hole.
The third is to pour boiling water on it, smell it with your nose, the natural slurry only has a muddy smell, and with the more times the boiling water is showered, the earthy smell becomes weaker and weaker, and the chemical slurry will have a pungent chemical smell.
The fourth is to stroke with your hands, the natural pulp is as smooth as the baby's skin, and the chemical pulp will have a little astringent feeling.
Fifth, the natural slurry is scalded with boiling water several times and wiped with a dry towel, and the surface of the natural slurry has hardly changed, while the chemical slurry will become more and more dry, and the traces of the slurry will be lost in the end.
Above, I hope it will be helpful for you to distinguish the authenticity of the purple clay pot.
Note: **Nothing to do with the text).