A good soap saponification reaction means that the grease and lye react fully and completely to produce a gentle, stable and safe soap.

You can evaluate soap saponification comprehensively from the following dimensions, through a combination of sensory judgment and scientific testing:

1. Core judgment criteria: whether saponification is complete (the most important safety indicator)

Incomplete Soap saponification means that there may be unreacted strong bases (sodium hydroxide) left in the soap, and the use of such soap can irritate or even burn the skin.

1). pH testing (the most objective and reliable method)
This is the preferred scientific method to determine whether saponification is complete.
Methods: After the soap body matures (usually 4-6 weeks after the soap is removed and cut), the soap surface is wetted with distilled water and then measured with a precision pH test strip or pH meter.
Standard:
Good (safe) :p H value is usually between 7-10. The ideal handmade soap has a pH between 8-9.5, which is slightly alkaline and mild and non-irritating.
Poor effect (dangerous) :p H value higher than 10 indicates that there is too much lye residue and incomplete saponification. Absolutely not for use on the skin.
2. Tongue test (traditional but extremely discreet method)
This is a very ancient method that uses the "prickly" sensation of the tongue to the base. Please note: This method is risky and not recommended for novices. If you must try, be extremely careful.
Method: Quickly tap the dry soap noodles with the tip of your tongue and leave instantly.

Standard:
Good effect: only a faint, "electric shock"-like slight numbness, no continuous burning sensation. It means that the alkali has basically reacted completely.
Poor effect: Feeling a strong, persistent burning or tingling sensation, like a bite. This indicates that the alkali content is too high and the saponification is incomplete.

2. Judgment of the appearance and touch of the finished product
1). Observe the structure of the saponic body
Good results:
The texture is uniform and delicate, the color is consistent, and there is no obvious water-oil separation, oil spots or white powder (soda ash, alkali precipitation, only affects the appearance, not the use).
The surface is smooth and flat, and the internal structure is tight, with no or very few bubbles.
Poor effect:

Visible oil spots: dark oil droplet-like spots on the surface, which is a sign that the oil is not fully reacting.

Soda Ash is too bad: While white powder is harmless on its own, it can sometimes mean that the soap is too low or the saponification is not ideal when entering the mold.

Weeping: Liquid seeping out from the surface, which may be water, glycerin, or unreacted lye, is a clear problem soap.

Separation: The soap body is clearly divided into two or more layers with different textures.

2).Touch test

Good results:
The soap body is hard and solid, and it has hardness when pinched but will not be bothered.
The surface is delicate and smooth to the touch.
Poor effect:
It feels soft and sticky, and is easy to deform when pinched, like plasticine. This could mean incomplete saponification or excess moisture. There is a mucus or oiliness on the surface.

3. Judgment of user experience

In the end, a good bar of soap still has to be tested by use.
1). Cleansing power and skin feel
Good results:
It can produce a rich, fine and stable foam.
The washing feeling is refreshing and the cleaning power is sufficient, but the skin is not tight, dry, or itchy after use.
Even without extra fat, it feels gentle.
Poor effect:
The foam is sparse and disappears quickly.
The skin is noticeably dry, tight, and even itchy and tingling when used. This is a typical manifestation of excessive alkalinity.
2). Durability
Good effect: the soap body is hard, not easy to absorb water and soften, slow loss during use, and relatively durable.
Poor effect: the soap body is soft and rotten, and quickly turns into a paste when exposed to water, which is very undurable.

The soap saponification equipment made by has the ability to completely saponify, our engineers also have more than 30 years of saponification technology, we provide saponification system, saponification drying system, soap production equipment, printer, packaging machine and other complete production equipment. If you like our equipment, please contact us.

Nigeria has a population of 200 million. As daily necessities, washing and toiletries have a huge market demand in Nigeria. Soap has the functions of cleaning the body, removing dirt and sterilizing, and it can also help wash clothes. In addition, it also has the functions of providing skin moisturizing, eliminating odor, beautifying and skin care, helping to maintain personal hygiene and promote health, and can regulate oil balance. Therefore it is becoming more and more popular among people. Of course, as demand for personal hygiene increased, so did the demand for soap. This has also become one of the reasons why investors choose soap production lines.

In addition, soap is a consumable product and is basically used for skin cleaning or washing clothes every day. If the average person uses a piece of soap every 2-3 months, then the consumption of soap in a year is also very alarming. Therefore, the soap production line can continue to bring profits and reports to investors.

Note: the people in this photos is our clients from Nigeria . he is checking our soap mould for his soap producion line .

We are a professional supplier of soap production equipment. Our main products include fully soap automatic production lines, liquid soap production equipment,soap plodder machine . soap cutting machines, soap packaging machines, and three-roller grinders. Our engineers have extensive experience in overseas installation training and can help you get returns as soon as possible.

Yes, we can supply the toilel soap/laundry soap formula to you, if necessary, our engineer can visit your factory to teach your work man to operate the soap machine, and guide to make the soap formula, to produce different quality soap

We have the capacity: 100-300kg/h, 300-500kg/h, 500-1000kg/h, 1000-2000kg/h

With a low investment but high profit.

If it is your new business, the 100-300kg/h laundry soap producing line will be suitable, the toilet soap producing line need three more machine base on the laundry soap producing line.

A good saponification reaction means that the grease and lye react fully and completely to produce a gentle, stable and safe soap.
You can evaluate it comprehensively from the following dimensions, through a combination of sensory judgment and scientific testing:

1. Core judgment criteria: whether saponification is complete (the most important safety indicator)
Incomplete saponification means that there may be unreacted strong bases (sodium hydroxide) left in the soap, and the use of such soap can irritate or even burn the skin.

1）. pH testing (the most objective and reliable method)
This is the preferred scientific method to determine whether saponification is complete.

Methods: After the soap body matures (usually 4-6 weeks after the soap is removed and cut), the soap surface is wetted with distilled water and then measured with a precision pH test strip or pH meter.

Standard:

Good (safe) :p H value is usually between 7-10. The ideal handmade soap has a pH between 8-9.5, which is slightly alkaline and mild and non-irritating.

Poor effect (dangerous) :p H value higher than 10 indicates that there is too much lye residue and incomplete saponification. Absolutely not for use on the skin.

2. Tongue test (traditional but extremely discreet method)
This is a very ancient method that uses the "prickly" sensation of the tongue to the base. Please note: This method is risky and not recommended for novices. If you must try, be extremely careful.

Method: Quickly tap the dry soap noodles with the tip of your tongue and leave instantly.

Standard:

Good effect: only a faint, "electric shock"-like slight numbness, no continuous burning sensation. It means that the alkali has basically reacted completely.

Poor effect: Feeling a strong, persistent burning or tingling sensation, like a bite. This indicates that the alkali content is too high and the saponification is incomplete.

2. Judgment of the appearance and touch of the finished product

1）. Observe the structure of the saponic body

Good results:

The texture is uniform and delicate, the color is consistent, and there is no obvious water-oil separation, oil spots or white powder (soda ash, alkali precipitation, only affects the appearance, not the use).

The surface is smooth and flat, and the internal structure is tight, with no or very few bubbles.

Poor effect:

Visible oil spots: dark oil droplet-like spots on the surface, which is a sign that the oil is not fully reacting.

Soda Ash is too bad: While white powder is harmless on its own, it can sometimes mean that the soap is too low or the saponification is not ideal when entering the mold.

Weeping: Liquid seeping out from the surface, which may be water, glycerin, or unreacted lye, is a clear problem soap.

Separation: The soap body is clearly divided into two or more layers with different textures.

2）. Touch test

Good results:

The soap body is hard and solid, and it has hardness when pinched but will not be bothered.

The surface is delicate and smooth to the touch.

Poor effect:

It feels soft and sticky, and is easy to deform when pinched, like plasticine. This could mean incomplete saponification or excess moisture.

There is a mucus or oiliness on the surface.

3. Judgment of user experience

In the end, a good bar of soap still has to be tested by use.

1）. Cleansing power and skin feel

Good results:

It can produce a rich, fine and stable foam.

The washing feeling is refreshing and the cleaning power is sufficient, but the skin is not tight, dry, or itchy after use.

Even without extra fat, it feels gentle.

Poor effect:

The foam is sparse and disappears quickly.

The skin is noticeably dry, tight, and even itchy and tingling when used. This is a typical manifestation of excessive alkalinity.

2）. Durability

Good effect: the soap body is hard, not easy to absorb water and soften, slow loss during use, and relatively durable.

Poor effect: the soap body is soft and rotten, and quickly turns into a paste when exposed to water, which is very undurable.

The soap saponification equipment made by Henan LOVO Industry Co.,Ltd has the ability to completely saponify, our engineers also have more than 30 years of saponification technology, we provide saponification system, saponification drying system, soap production equipment, printer, packaging machine and other complete production equipment. If you like our equipment, please contact us.

The workflow of soap saponification equipment mainly includes raw material preparation, saponification reaction, washing separation, post-treatment and other steps. The specific process is as follows:

1. Raw material preparation

Oil pretreatment: filter to remove impurities and adjust the moisture content (if necessary).

Preparation of alkali solution: dissolve sodium hydroxide (NaOH) or potassium hydroxide (KOH) in water to prepare a certain concentration of alkali solution (such as about 30%).

Metering and mixing: send oil and alkali solution to the saponification reaction equipment according to the formula ratio.

2. Saponification reaction

Heating and stirring: heat to 60~100°C in the reactor (saponification pot), and stir continuously to promote the reaction.

Direct saponification method: oil and alkali solution directly react to produce soap (fatty acid salt) and glycerol.

Indirect saponification method: first hydrolyze oil to produce fatty acids and glycerol, and then neutralize with alkali.

Reaction monitoring: detect the degree of reaction by pH value, viscosity or sampling (usually takes several hours).

3. Washing and separation

Salting out: Add saturated salt water (NaCl) to separate soap and glycerin (soap precipitates and floats on the upper layer, and glycerin aqueous solution is in the lower layer).

Washing: Separate the lower glycerin solution (recyclable), and wash the soap layer with clean water to remove residual alkali and salt.

4. Post-processing

Blending: Add spices, pigments, additives, etc. to adjust the properties of soap.

Molding: Pour the soap slurry into the mold to cool and solidify (block soap), or spray dry it into powder (washing powder).

Drying and cutting: Cut into standard sizes after natural drying or drying.

Packaging: Package the finished product and mark the ingredients, production date and other information.

Key equipment

Reactor: Saponification pot with stirring and heating functions.

Separation tank: used for salting out and stratification.

Drying equipment: spray drying tower or drying room.

Molding machine: pressing, cutting, printing equipment.

Precautions

Safety protection: Alkaline solution is corrosive, and protective equipment must be worn.

Reaction control: Avoid excessive saponification that leads to deterioration of soap quality.

Environmental requirements: Treatment of wastewater and by-products must comply with environmental standards.

This process can adjust specific parameters according to the production scale (intermittent or continuous) and soap type (toilet soap, laundry soap, etc.).