2025 Junior Formula Master Prediction Exam Paper

2025 Junior Formula Teacher Prediction Exam Paper
Exam Time: ____ Minutes Total Score: ____ Points Name: ____
1. Multiple Choice Questions (Please fill in the letters of the correct options in parentheses) 1 Which of the following raw materials mainly rely on forming hydrogen bonds to provide skin moisturizing effect? () A. Fatty acids B. Glycerol C. Protein D. Silicone oil 2 What is the method used in the production process of cosmetics to kill all microorganisms (including spores) on objects? () A. Disinfection B. Sterilization C. Cleaning D. Decontamination
3. According to relevant regulations on cosmetics in China, the main differences between ordinary cosmetics and special cosmetics in terms of raw material use, production license, label identification, etc. are as follows:? A. Market price B. Product packaging color C. Types and concentrations of functional ingredients contained D. Whether registration or filing is required 4 Which of the following chemical structures is commonly used as a pH regulator and preservative in cosmetics? () A. Acetic acid

B. Polyethylene glycol C. Urea D. Silanol 5 When designing a facial mask product, if you want it to have a good moisturizing effect, you should give priority to adding "? () A. Alcohol B. Mineral oil C. Sodium hyaluronate D. Beeswax 6 What is one of the key factors affecting the stability of cosmetics lotion? () A. Raw material cost B. pH value C. Production speed D. Laboratory environment temperature 7 Which of the following descriptions about the cosmetic ingredient "deionized water" is correct? A. There are various mineral ions dissolved in water B. The conductivity of water is high C. After purification treatment, it contains almost no impurity ions D. It is mainly used to adjust the viscosity of the product 8 The preservative system used in the formula usually requires the inclusion of several preservatives with different mechanisms of action, and its main purpose is to? () A. Improve product efficacy B. Increase product aroma C. Extend product shelf life and reduce the risk of microbial resistance

D. Reduce production costs 9 Does the natural barrier function on the surface of the skin include? ()
A. Physical barrier B. Chemical barrier C. Microbial barrier D. Thermal barrier 10 Can you briefly explain the main principles of using acids (such as AHA) for skin rejuvenation (exfoliation)? () A. Disrupting the lipid bonds between skin keratinocytes B. Promoting the activity of skin melanocytes C. Increasing the moisture content of the stratum corneum D. Killing harmful microorganisms on the surface of the skin II. Fill in the blank questions (please fill in the answers on the blank) 1 The formula design of cosmetics usually needs to consider factors such as the product's ____, ____, ____, and regulatory compliance. two The prescription amount is usually expressed in units of ____ or ____. three The hygiene license of cosmetics production enterprises in our country needs to be approved by the food safety supervision and management department at or above the level of ____. four The content that must be labeled on cosmetics labels includes product name, specifications, manufacturer name and address, ____, production date or batch number, usage instructions, and precautions. five Lotion cosmetics can be divided into oil in water (O/W) type and water in oil (W/O) type. The main difference is the continuous phase of ______ and the discontinuous phase of ______. six The main components of natural moisturizing factor (NMF) in the skin are ____ and amino acids. seven The commonly used classification methods for preservatives include classification by ____, classification by ____, and classification by mechanism of action. eight The main functions of emulsifiers in cosmetic formulations are ____ and ____. nine For cosmetics claiming to have specific efficacy, the corresponding ____ must be obtained before use.

10. In cosmetics, matrix materials not only serve to fix other components, but also directly affect the ____, ____, and ____ of the product. 3、 True or False (please check the correctness of the following statements, mark a "√" for correct statements and a "×" for incorrect statements)
1. No cosmetics can cause skin allergies. （ ） 2. The higher the concentration of active ingredients in the formula, the better the efficacy of the product. （ ） 3. Disinfection refers to the process of killing all microorganisms on an object. （ ） 4. Special purpose cosmetics refer to cosmetics with special functions or uses, such as whitening, freckle removal, sunscreen and other cosmetics. （ ） 5. The quality management system of cosmetics manufacturing enterprises does not need to be recognized by external organizations. （ ） 6. Mineral oil is a natural vegetable oil that has good moisturizing and sealing properties. （ ） 7. The stability testing of cosmetic formulas usually includes investigation under conditions such as high temperature, high humidity, and freeze-thaw cycles. （） 8. Both acidic and alkaline substances can damage the structure of the stratum corneum of the skin, making them suitable for exfoliating. （） 9. Any cosmetics must be approved by the National Medical Products Administration before being marketed for sale. （ ） 10. When designing formulas, cost factors are usually not an important aspect to consider. () 4. Short answer question 1 The action mechanism and selection principle of emulsifier in cosmetics lotion formula were briefly described. two Describe the purpose and significance of conducting microbial limit testing in the production process of cosmetics. three According to relevant Chinese regulations, what are the main differences in the procedures that need to be followed before selling ordinary cosmetics and special cosmetics in the market? four What is the pH value of cosmetics? What adverse effects may unreasonable product pH values have on the skin? five What factors should be considered when designing a moisturizing product formula for sensitive skin to reduce irritation and improve safety? 5、 Case analysis question

A cosmetics company plans to develop a daytime skincare lotion that claims to have "refreshing oil control" and "basic moisturizing" functions. Please answer the relevant questions based on the following information:
* Target skin type: oily, combination skin. *Product requirements: Lightweight texture, non greasy, with good moisturizing effect, pH value close to the natural state of the skin (5.5-6.5), and anti-corrosion system needs to be added. *Selected candidate raw materials:
* Raw material A: Polyethylene glycol-400 (PG-400) * Raw material B: Glycerol * Raw material C: Butanediol * Raw material D: 1,2-hexanediol * Raw material E: Sodium hyaluronate * Raw material F: Hydroxyphenethyl ester * Raw material G: Coconut oil octanoate decanoate (a non-ionic surfactant) * Raw material H: Citric acid. Please answer: 1 Which ingredients do you think are most suitable as moisturizers in the formula of this product? Please explain the reason. two Would you consider using raw material H to achieve the required pH range for the product? Why? If pH needs to be adjusted, what types of raw materials can be considered besides acids? three Please choose a suitable preservative (or preservative system) for this product and briefly describe its mechanism of action. four From the perspective of formula design, what role may raw material G play in this product? If you want the product to have a fresher skin feel, which ingredients can be adjusted or what types of ingredients can be added? --Answer 1: Multiple Choice Question

1. B 2. B 3. D 4. A 5. C 6. B 7. C 8. C 9. D 10. A. 2. Fill in the blank question 1 Effect, safety, stability, usability 2 Gram (g), kilogram (kg) 3. Save 4 Production date 5 Oil phase, water phase 6 Hyaluronic acid 7 Chemical structure, functional groups, and mechanism of action 8 Reduce interfacial tension and form a stable film Approval number 10 Appearance, Skin Texture, and Usage Effect 3. True or False Question 1 ×

2. ×
3. ×
4. √
5. ×
6. ×
7. √
8. ×
9. ×
10. ×2. Analysis approach: Microbial limit testing is used to evaluate whether cosmetics are contaminated by microorganisms, determine whether they meet hygiene standards, and ensure the safety and effectiveness of product use. Through inspection, the microbial condition of the product can be understood, and problems in the production process can be detected and controlled in a timely manner.
3. Analysis approach: Ordinary cosmetics are subject to a filing system, and once the enterprise completes the product filing, it can be put on the market for sale. Special cosmetics implement an approval system, and enterprises need to submit complete information to apply for an approval number. Only after obtaining approval can they produce and sell them. The difference between the two lies in the strictness of regulation and the procedural requirements before listing.
4. Analytical approach: pH value is an indicator of the acidity or alkalinity of a substance. The pH value of cosmetics should be appropriate. Either too high or too low may damage the lipid membrane and protein structure of the stratum corneum, leading to impaired skin barrier function and causing irritation, dryness, sensitivity, and other problems. Products that are close to the natural pH value of the skin are usually milder.
5. Analysis idea: When designing sensitive skin products, mild surfactants and non irritating raw materials should be prioritized, products with pH values close to neutral should be selected, sufficient moisturizers should be added to maintain skin moisture, efficient and mild anti-corrosion systems should be selected, and strict irritation and allergy tests should be conducted to ensure product safety.
5、 Case analysis question

1. Analysis idea: Moisturizing agents should have good moisturizing effects and mild properties. Glycerol, butanediol, and sodium hyaluronate are common moisturizers. Glycerol and butanediol are polyols that can absorb water; Sodium hyaluronate is a highly absorbent substance. For oily skin, it may be better to choose small or medium molecular weight sodium hyaluronate, or to combine it with other small molecule moisturizers to improve moisturizing efficiency without being too sticky. The main function of PG-400 is thickening and lubrication.
2. Analysis idea: Citric acid is an acidic raw material that can be used to adjust the pH value. However, due to its slightly stronger irritability and limited regulatory range, it may not be the optimal choice. In addition to acids, alkaline substances (such as sodium carbonate and sodium bicarbonate, but attention should be paid to their potential irritation to the skin) or organic amines (such as triethanolamine and betaine, but attention should be paid to their potential irritation or sensitization) can also be considered. When choosing, it is necessary to balance the pH adjustment effect and skin safety.
3. Analysis idea: Preservatives need to be able to effectively inhibit the microorganisms that may exist in the product. Hydroxyphenethyl ester is a common paraben preservative, and its mechanism of action is to interfere with the cell membrane structure and metabolism of microorganisms, causing them to die. For skincare water, it can be used alone or in combination with other preservatives (such as quaternary ammonium salts and polyquaternary ammonium salts) to form a synergistic effect, improve the preservative effect, reduce the concentration of single preservatives, and enhance safety.
4. Analysis idea: Raw material G is a non-ionic surfactant of fatty acid esters, mainly used as a cleaner or moisturizer, providing a certain cleaning power or improving skin feel. If you want the product to be fresher, you can reduce the amount of raw material G, or choose a milder and easier to wash surfactant, or increase the proportion of small molecule moisturizers and solvents (such as PG, butanediol) to reduce the overall formula viscosity.