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Preservatives 101: Which One Should You Use?Not all cosmetic preservatives are the same, and one preservative does NOT f...
16/08/2026

Preservatives 101: Which One Should You Use?

Not all cosmetic preservatives are the same, and one preservative does NOT fit every formula.

From Liquid Germall Plus and Optiphen to Optiphen Plus, Geogard ECT, Geogard 221 and Euxyl PE 9010, each preservation system has its own recommended usage rate, pH range and formulation compatibility.

For example:

Liquid Germall Plus: creams, lotions, serums, shampoos and washes.
Optiphen: emulsions, lotions, creams and some scrub systems.
Optiphen Plus: slightly acidic water-based products.
Geogard ECT: creams, lotions, toners, shampoos and body washes.
Geogard 221: creams, lotions, shampoos, conditioners and shower gels.
Euxyl PE 9010: many creams, lotions, serums and wash-off products.

And remember: anhydrous body butters and oil-only serums generally don't need a conventional preservative because they contain no water. Vitamin E can help slow oil oxidation, but Vitamin E is NOT a preservative.

Always check the manufacturer's technical data before formulating. Never guess your preservative percentage.

Which preservative do you currently use? Drop the name in the comments.

Subscribe to Personal Care with Phill to support the page and learn more about professional-style DIY skincare formulation.

16/08/2026

Why Can a Preserved Product Still Go Bad?

You added preservative… so why did your cream still spoil?

Because preservation is more than just adding a preservative.
Your product can still have problems if you use:
Incorrect preservative levels
The wrong pH
Poor manufacturing hygiene
Contaminated raw materials
Incompatible ingredients
Unsuitable packaging
Wet or contaminated hands during use
A broad-spectrum preservative helps control microbial growth, but it cannot compensate for a poorly formulated or poorly manufactured product.
That's why professional cosmetic formulation involves proper sanitation, pH control, stability testing, microbial testing and preservative efficacy testing.
And don't automatically put “6 months” or “12 months” on your product just because you've added preservative. A commercial shelf life should be supported by appropriate testing.
Have you ever had a preserved DIY product spoil? Tell me what happened in the comments.
Subscribe to Personal Care with Phill to support the page and follow for more formulation education.

16/08/2026

How Much Preservative Should You Actually Use?
More preservative does NOT mean a safer product.
When formulating skincare, the preservative percentage must be calculated according to the specific preservative manufacturer's recommended usage rate.
For example, if your preservative is approved for use at 0.5%, then:
100 g batch × 0.5% = 0.5 g preservative
Always weigh preservatives accurately with a digital scale. Don't measure them with teaspoons or simply guess.
And remember, 0.5% is only an example. Different preservatives have different usage rates, pH requirements, and processing instructions.
Before formulating, always check the supplier's technical data.
What preservative are you currently using? Comment the name below.
Subscribe to Personal Care with Phill to support the page and learn more about cosmetic formulation.

15/08/2026

How Do You Choose the Right Cosmetic Preservative?

Not every preservative works for every skincare formula. Choosing the right one requires more than simply picking a popular name.

Before adding a preservative, check these four things:

1. Usage Rate
How much does the manufacturer recommend?

2. pH Range
Will the preservative remain effective at your formula's final pH?

3. Processing Temperature
Can it be added during heating, or does it need to go into the cool-down phase?

4. Formula Compatibility
Is it suitable for your specific cream, serum, lotion, shampoo, or cleanser?

For example, Liquid Germall Plus is one broad-spectrum option used in many water-containing cosmetic formulations, but it shouldn't automatically be substituted for another preservative at the same percentage. Always follow the supplier's technical documentation.

And remember: more preservative does not mean better preservation.

Which preservative are you currently using? Drop the name in the comments.

Subscribe to support Personal Care with Phill and follow this preservative series for more formulation education.

14/08/2026

Vitamin E Is NOT a Preservative

This is one of the most important things every DIY skincare maker needs to understand.

Vitamin E is an antioxidant, not a broad-spectrum preservative.
Vitamin E helps protect oils from oxidation and rancidity, which is why it's useful in products such as:
Body butters
Lip balms
Facial oils
Oil-based serums
But if your formula contains water, vitamin E alone will not protect it from bacteria, yeast, and mold.
For example:
Body oil + Vitamin E: helps slow oxidation.
Body butter + Vitamin E: helps protect the oils.
Water-based face cream + Vitamin E only: not adequately preserved.
A water-based cream, serum, lotion, shampoo or toner needs an appropriate broad-spectrum preservation system.
Remember this simple rule:
Vitamin E protects against oxidation.
Preservatives protect against microbial growth.
Did you already know this, or is this new information for you? Tell me in the comments.

Subscribe to Personal Care with Phill to support the page and follow the preservative series.

Part 3 is coming: How do you choose the right preservative?

Strawberry Velvet Melt & Pour Soap This is the strawberry soap I would make when I want a bar that looks as luxurious as...
13/08/2026

Strawberry Velvet Melt & Pour Soap

This is the strawberry soap I would make when I want a bar that looks as luxurious as it smells!
A simple melt-and-pour recipe transformed with strawberry fragrance and a touch of pink mica for a beautiful handmade bar. Perfect for beginners, gifting and satisfying soap-making videos.
Recipe — 500 g
490 g White Melt & Pour Soap Base
5 g Strawberry Fragrance Oil
4 g Vitamin E Oil
1 g Pink Cosmetic Soap-Safe Mica
Method: Cut and gently melt the soap base. Add mica and mix well. Add vitamin E and fragrance. Stir gently. Pour into molds, spray lightly with 99% isopropyl alcohol to remove bubbles, then allow to harden completely.
Benefits
Gently cleanses
Leaves skin feeling soft
Beautiful pink appearance
Sweet strawberry fragrance
Easy beginner-friendly soap
How to Use: Wet the bar, lather between hands or on a washcloth, massage onto the body and rinse thoroughly.

Hibiscus Sugar Shower Scrub Turn your shower routine into a pink, creamy exfoliating experience with this Hibiscus Sugar...
13/08/2026

Hibiscus Sugar Shower Scrub

Turn your shower routine into a pink, creamy exfoliating experience with this Hibiscus Sugar Shower Scrub!
Fine sugar provides the physical exfoliation, while shower gel creates the cleansing base and sweet almond oil helps leave skin feeling conditioned.

Recipe — 200 g
100 g Fine White Sugar
30 g Hibiscus Powder
40 g Shower Gel
25 g Sweet Almond Oil
4 g Vitamin E Oil
1 g Hibiscus or Berry Fragrance Oil
Method: Mix shower gel, sweet almond oil and vitamin E. Add hibiscus powder. Fold in sugar gently. Add fragrance and mix evenly. Fill into a clean jar.
Benefits
Gently exfoliates
Leaves skin feeling smoother
Helps remove surface buildup
Leaves a soft, conditioned feel
Beautiful hibiscus appearance
How to Use: Massage gently onto wet body skin, then rinse thoroughly. Avoid broken or irritated skin.
Formulation Note: Because oils and botanical powder are added to a preserved shower gel, the original preservation system should not automatically be assumed adequate. For selling, validate the preservative system and finished product microbiologically.

Vanilla Glow Body OilIf you love a silky body oil with a warm vanilla aroma, save this recipe!This lightweight oil blend...
13/08/2026

Vanilla Glow Body Oil

If you love a silky body oil with a warm vanilla aroma, save this recipe!
This lightweight oil blend combines sweet almond oil, fractionated coconut oil and jojoba oil for a smooth, elegant body-care finish.

Recipe — 100 g
50 g Sweet Almond Oil
30 g Fractionated Coconut Oil
15 g Jojoba Oil
4 g Vitamin E Oil
1 g Vanilla Fragrance Oil
Method: Combine all ingredients in a clean, sanitized beaker. Stir gently until uniform. Bottle and close tightly.
Benefits
Conditions dry-feeling skin
Leaves skin soft and smooth
Lightweight, silky finish
Beautiful vanilla fragrance
How to Use: Apply a small amount to clean, slightly damp skin after bathing and massage until absorbed.

Rose Glow Body Oil: Want your skin to feel silky while carrying a beautiful rose aroma? Make this elegant Rose Glow Body...
13/08/2026

Rose Glow Body Oil

: Want your skin to feel silky while carrying a beautiful rose aroma? Make this elegant Rose Glow Body Oil.
Sweet almond, jojoba, fractionated coconut and rosehip oils create a simple luxury body-oil blend perfect for everyday body care.
Recipe — 100 g
50 g Sweet Almond Oil
30 g Fractionated Coconut Oil
15 g Jojoba Oil
4 g Rosehip Oil
0.5 g Vitamin E Oil
0.5 g Rose Fragrance Oil
Method: Combine all ingredients in a sanitized beaker. Stir gently until completely blended. Transfer into a suitable cosmetic bottle.

Benefits
Helps soften dry-feeling skin
Leaves skin smooth and conditioned
Lightweight, non-greasy feel
Elegant rose aroma
How to Use: Massage a small amount onto clean, slightly damp skin.

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