Skin Renewal Exfoliating Serum

Purpose

A facial exfoliating serum designed to help remove dead skin cells, improve the appearance of uneven texture and dullness, and help keep pores clear.

Ingredients

• Distilled Water — 69.8 g
• Aloe Vera Juice — 10 g
• Propylene Glycol — 5 g
• Glycerine — 3 g
• Glycolic Acid 70% — 5.7 g
• Lactic Acid 80% — 2.5 g
• Salicylic Acid — 0.5 g
• Panthenol — 1 g
• PEG-40 Hydrogenated Castor Oil — 1.5 g
• Euxyl PE 9010 — 1 g

Total: 100 g

Target pH

3.6–3.8

Method

1. Sanitise all equipment, utensils and serum bottles.
2. Add the distilled water and aloe vera juice to a clean mixing vessel.
3. Add the glycerine and panthenol. Mix until completely dissolved.
4. In a separate beaker, combine the salicylic acid and propylene glycol.
5. Mix thoroughly until the salicylic acid is completely dissolved. Gentle warming may be used if necessary. Do not overheat.
6. Add the PEG-40 Hydrogenated Castor Oil to the salicylic-acid mixture and mix well.
7. Slowly add the salicylic-acid premix to the main water phase while stirring.
8. Slowly add the glycolic acid 70% while mixing.
9. Add the lactic acid 80% and mix thoroughly.
10. Add Euxyl PE 9010 and mix well.
11. Check the pH using a calibrated digital pH meter.
12. Adjust slowly to pH 3.6–3.8 using a suitable diluted pH-adjusting solution.
13. Mix thoroughly and check the pH again.
14. Allow the serum to stand for 24 hours and check for crystals, sediment or separation.
15. Fill into a clean serum bottle, preferably an airless or pump bottle.

How to Use

Apply a small amount to clean, dry skin in the evening 1–2 times per week initially.

If the skin tolerates the serum well, usage can gradually be increased.

Avoid the eye area, lips and broken or irritated skin.

Use a broad-spectrum sunscreen during the day.

Important

This is an exfoliating acid serum, not a chemical peel.

Patch testing is recommended.

Before selling the finished product, perform appropriate stability and preservative-efficacy testing. Check the finished serum for pH, appearance and salicylic-acid crystallisation.

Do not use on severely irritated or compromised skin.