Indian cremation
Death is something that everyone goes through, but you'll never be able to experience what it's like to die!
Therefore, for the handling of the "cremation" of the remains after death, a bunch of people have a bunch of problems.
Generally divided into two categories, one is the details of cremation with various question marks:
When cremated, will the stomach be cut open to prevent an explosion?
Can it really burn people to ashes?
Fatter, is it burning longer?
The ashes are all similar, will you put the ashes in the wrong place?
……
There is also a kind of superstition, such as: when burning, the remains will scream? Will it bleed and cry? Will you suddenly sit up? Isn't that scary?
All doubts are in fact caused by a lack of understanding of the cremation process or a lack of understanding.
Ashes capsules
Scientifically, what is the division of ashes?
As long as it is the ashes of a loved one, there is a chance to see or touch it with their own eyes, the funeral home has the service of watching the body burn throughout the process, and also allows the relatives to put the ashes in the container.
However, many people are too sad or afraid to look directly at the burning process because of excessive sadness, and they dare not hold the ashes with their own hands, so they do not know much about what the ashes are.
Ashes are often visible on television, white and fine, similar to flour. In fact, the real ashes are still very different from those on TV
Ancient ashes
Scientifically, the main component of ashes is calcium phosphate, which is also doped with a small amount of other salts.
In reality, the ashes are a bunch of mixtures of different forms, there are rough particulate matter, there are ashes, there are also pieces of bone that have not burned out, the whole is not white, but gray brown or gray white, each person's ashes are slightly different in color, the composition is also different, and it has uniqueness.
For an adult of more than 100 kilograms, the ashes left after cremation are generally only 2.4 kilograms (the general proportion is 3.5%, and the proportion of children is 2.5%).
In other words, whether you are beautiful and rich, poor and disabled, tall, fat, thin, or have different skin colors, after going through the heat of more than 900 degrees in a crematorium, burning continuously for an hour and a half (different bodies have different times of different circumstances), and finally become a pile of debris.
When burning, hair and clothing are the first to burn, and the body, because it contains water, will wait for the moisture to evaporate before it begins to burn skin, muscles, internal organs, nails, fat and other body parts.
At the beginning of the combustion, due to the sudden contraction of the muscles, the body will be distorted or the boxer will throw a punch, and it is not the deceased who suddenly sits up, so there is no need to be afraid.
As the temperature continues to rise, these substances are burned out and the organic matter becomes a gas for discharge.
The main component of bone is calcium phosphate, and after undergoing water loss, collagen and other organic matter decomposition, the bone is forced to "fracture" and the morphology changes.
Calcium phosphate properties are relatively stable, will not decompose at high temperatures, the melting point temperature is as high as 1670 ° C, the crematorium can not reach this temperature, so the final form will not change much, but become dry bones, different sizes, slight pressure can be crushed.
Tooth burning at high temperatures
Where did the teeth go? Burned to ashes?
After high temperature combustion, the bone is left behind, the main reason is that the main component of the bone is the inorganic calcium phosphate.
Teeth, on the other hand, are composed of enamel, dentin, bone, and pulp. In addition to the pulp is composed of organic matter, the other three structures are composed of organic matter and inorganic substances, and the content of inorganic substances is 96%, 70% and 55% respectively.
It is worth mentioning that the hydroxyapatite contained in tooth enamel is also one of the main inorganic components of bones.
So in the heat, will the teeth be preserved like bones?
On this issue, foreign countries have done special research, in the experiment, the teeth are divided into four groups, the experimental conditions are:
400°C 5min, 400°C 15min, 400°C 30min and 1100°C 15min.
The results showed that the temperature of the first three groups was low, and there was no obvious damage to the appearance of the teeth, but the color changed from light to dark, while the last group had a relatively high temperature, directly becoming black charcoal, and the shape changed seriously, becoming small debris and ashes.
By analogy, the temperature of the crematorium is lower than the experimental 1100 ° C, only more than 900 degrees Celsius, but the burning time is relatively long, up to one and a half hours, so when the body is cremated, the teeth will be like the bones, not completely burned into ashes, but will crack into small fragments at high temperatures.
It's just that the teeth are too small, mixed with broken bones, and it's hard to spot.
In addition, some funeral homes will use machines to grind the ashes, and the final product is a fine powder, making it more difficult to distinguish which is a tooth fragment.
Japanese bone picking ceremony
Dentures, on the contrary, are easy to find
At present, there are three main types of dentures on the market: plastic dentures, metal dentures, and ceramic dentures.
Plastic is definitely burned, ceramic dentures are generally combined with metal, the appearance of porcelain materials such as zirconia and aluminum dioxide such substances, chemical properties are not active, the melting point is also very high, and the metal substances inside, like metal dentures, the melting point is above 1000 ° C, so it is possible to retain.
It's just that in the high temperature state, the shape of these dentures will change to a certain extent, either the whole is cracked, or partially burned.
If you don't personally hold the ashes, in general, you won't be able to find these dentures.
Before the ashes are packed into boxes, the staff will simply handle the metal fragments that cannot be burned, and will be sucked away with magnets, and those that cannot be sucked away will also be manually removed.
The fragments left behind are not limited to dentures, but may also be screws used in surgical procedures, leftover jewelry, and even fragments of pacemakers that are at risk of explosion, and of course, may be entire gold teeth. Valuable items, funeral homes will return to the family.
Identifying labels
At last
Regarding cremation, the standards are different in many places.
I consulted a lot of information, and said that the ashes will eventually be ground into powder and then handed over to the family, but in fact, most people's ashes are "original", what it is like to burn out, will not grind, will not be manually crushed, unless the box can not be put down, will be pressed by hand.
Some people wonder whether they will make mistakes with the ashes, I think it is impossible, because when burning, it is basically one person and one furnace, or one person and one pit, and some funeral homes still have identification labels that cannot burn, and family members can also watch the collection of ashes, and the possibility of confusion is basically zero.
Many people think that cremation is very evil, mainly because they dare not face the cause of death.
There is a beginning and an end, is the consummation, we should look at death more scientifically!