The inspection team arrived as scheduled.

Zhang Xiaofan's company did not put up any slogans or banners.

Everything was as usual, and there weren't even a few people to greet them.

There are only three people in the company.

Zhang Xiaofan, Chen Ying, Deng Xiaoni.

The rest of the company is running as usual, and nothing has changed because of the arrival of the inspection team.

Qin Wei'an knew that Zhang Xiaofan had always been this virtue, and there were no mandatory requirements, so what should he do.

The whole process, in fact, is relatively simple, they checked it first, almost all the test reports, including finished products, semi-finished products, and raw materials.

Then they will randomly select a few finished products, and they need to bring them back for testing.

The whole test went to a propaganda board.

This is Zhang Xiaofan asked people to rush out overnight in the past few days, about food-grade coatings.

However, Qin Wei'an looked at this incomparably huge billboard.

In my heart, there are 10,000 bison galloping by.

You can do this kind of thing, and this billboard is at least two and a half meters high and six meters long.

It's literal.

What kind of food-grade paint advocate?

Then a detailed introduction to what is a food-grade coating!

This point is more true, and it doesn't brag about it.

It just means that food-grade paint is only a kind of paint that can only come into contact with food.

Members of the inspection team stopped in front of the billboard.

looked at it for a long time, and then asked Zhang Xiaofan next to him softly.

"This so-called food-grade paint ......"

In fact, food-grade coatings are simpler, in order to cope with the increasingly refined paint market, a kind of coating that can be used for food shelves, food ingredients, food storage and so on.

The main purpose is to make food safer when it comes into contact with its contents. ”

The leader of the inspection team, Hou Songyun.

Of course, he was just a group leader, and now he was listening intently, and then his eyes were looking at the billboard from time to time.

"You mentioned above that the heavy metal content of food-grade coatings is almost zero.

However, as far as I know, the filler used in solid powder coating is barium sulfate, which is a heavy metal, although it is very harmful to the human body, but in general it is also a heavy metal. ”

After speaking, she looked at Zhang Xiaofan and saw how Zhang Xiaofan explained?

"So the filler we use is not barium sulfate, but modified calcium carbonate.

Of course, this also means that our food-grade paint cannot be used outdoors.

Because calcium carbonate is particularly easy to powder after encountering sunlight and rain, it is easy to cause the paint film to peel off outdoors. ”

For food-grade coatings, the filler used is generally calcium carbonate.

However, calcium carbonate is easy to pulverize, so it can only be used indoors, and there is another problem.

The fluidity of calcium carbonate is very poor, so it causes the overall plane of the coating, the first gloss is not very high, and the leveling is not very good, and there will be a slight orange vein.

However, Zhang Xiaofan carried out a pretreatment of this calcium carbonate.

The use of coupling agent, a coupling agent is a substance that makes inorganic and organic matter form an organic substance.

Pretreatment with a coupling agent will increase the surface gloss and flatness of the coating after curing.

Therefore, the overall coating, on the surface, is a little worse than that of barium sulfate as a filler.

It does not affect the use.

Everyone knows that calcium carbonate is actually stone.

Of course, there are many manufacturers who will use the very low-profit kind of silica as a filler.

Silica is commonly said to be sand.

But silica also has a very fatal weakness, it is very wear and tear on machinery.

Therefore, many manufacturers are reluctant to use it.

However, among the additives of the coating, there is a product called fumed silica.

In this product, the particle size of silica is very small, and because its specific surface area is very large, it is very light to grab and let go.

But this one product, the increase is very small.

And because of its very fine particle size, there is no wear on machinery.

So the use is still quite widespread.

"Do you have a test report for this product?"

"There are no test reports from the three major international institutions, only one of our own, because we have just completed the research and development.

However, we have samples, and there are many products in our company that are close to this level. ”

"Then give us some samples later, and we'll go back and test it. ”

"Okay. ”

Hou Songyun actually had a whim, because this student collective poisoning incident has attracted great social attention.

This is not caused by spoiled food or poor quality food.

It is caused by the utensils that hold the food, and everyone can distinguish the spoiled or inferior food.

But if there is a problem with the utensils that are in place, then the problem is quite serious.

Ordinary people do not have any instruments that can detect whether this contained utensils contain heavy metals.

Although the content of heavy metals contained in many utensils is not very high, there is a difference in people's physique, some people have poor physique, and some heavy metals will cause physical discomfort.

And heavy metals have the property that they are deposited in the human body.

It is difficult to excrete from the body, which causes that once you are poisoned by heavy metals, often in small doses in the future, your body will be poisoned again.

So now, Hou Songyun has been carefully studying the words on it, and he feels that he must pay attention to this thing.

The paint provided by Zhang Xiaofan, he must take it back for testing.

If the heavy metal content is really very small.

Even, according to Zhang Xiaofan, the heavy metal content is almost zero.

Then this paint does have something worth promoting.

And now the so-called food-grade coating, is completely a concept that has just emerged, if it is proposed by itself, the benefits are obvious.

So at this time, Hou Songyun was very concerned.

Of course, there must be a premise, that is, the samples taken back for testing must, as Zhang Xiaofan said, be close to zero heavy metals.

The one that can be used in contact with food without any fears.

This is introduced above, from the selection of raw materials to the selection of machinery and equipment, all links are strictly controlled.

In order to prevent heavy metals from being mixed in a certain link.

Now, Hou Songyun suddenly had the idea of visiting the company.

I've just been looking around the office.

So he turned his head and asked Zhang Xiaofan.

Zhang Xiaofan is naturally a hundred willing, and originally designed such a large propaganda column by himself this time.

Isn't it just to get their attention!