Compared with the difference between thousands of gold and 999 gold

Compared with the difference between thousands of gold and 999 gold

In the jewelry market, we often hear the two nouns of thousands of gold and 999 gold.Although they are all precious metal materials, there are actually some obvious differences.This article will compare thousands of gold and 999 gold in terms of color, gold content, and price.

Colors

First, let's take a look at the color of these two materials.Thousands of gold usually refer to 18K or 14K gold alloys, including other materials such as silver and copper.And 999 gold refers to pure gold with a purity of 99.9%, which is the 24K pure gold we often call.

content

The next thing to consider is how much pure yellow 1 carat (1K) actually contains these two materials is equivalent to 0.2 grams; so 20K is about 4 grams); so 18K means that each 20 grams of parallel is parallens per 20 grams.

Add an appropriate amount of saturated iodide solution to the dyeing bath, stir at 80 ° C for 15 minutes, make it absorb iodine and dry it, and spread it in the sodium sulfate solution to expand it.

Take 5g of the sample and put it in the inner furnace of the tin dish to heat it to 800 ° C for 2 hours. Take it out and cool to the room temperature. It is called a large thick particle and a stem with a siege.

Use sodium hydroxide (0.5 mol/L) solution to continuously quench it continuously 6 times each quenching time 30s, maintain time 10s.

Then put it in the 60 ° C constant temperature sink and keep it for 12 hours to remove the drain.

Put the sample in the containe

Attachment: (1) Basic information:

Cabbage, also known as the BRASSICA Pekinensis Rupr.

Native to China, widely cultivated nationwide.

Cabbage is rich in nutrition and is known as "longevity vegetables" and "detoxification holy products".

(2) Instrument and equipment:

Constant temperature sink, electronic balance, constant temperature oscillator;

Glass instrument: filter; pipette tube;

Reagents and medicines:

Dilute hydrochloric acid (HCL);

Rare sulfuric acid (H_2SO_4);

Hydrogen peroxide (H_2O_2);

Water -free ethanol (C_2H_5OH);

Zhengke Stone;

glycerin;

Qiongli;

Su Musu;

Ink;

Others: pH test strip; physiological saline (0.9%NaCl); sodium hydroxide (NaOH); potassium permanganate (KMNO4)

All of the above reagents are excellent.

Amount.

price

Because the price of 999 yellow is high, the unit price will be much higher at the same weight.Ten points can provide more cost -effective choices, suitable for those who want to buy lower price jewelry but are unwilling to sacrifice quality.

Appearance and durability

The last aspect needs to be considered the appearance and durability of these two materials.Due to different purity, ten points are more likely to cause deformation or scratch.On the contrary, basically no reaction will occur

To sum up, it has always been the most popular and favorite material in the jewelry industry. Especially when making high -end jewelry, it shows its preciousness. The contrast is obvious.