TFM in Soap vs Natural Handmade Soap — Which Is Better for Your Skin?

Quick answer: TFM (Total Fatty Matter) is a Bureau of Indian Standards (BIS) quality metric that measures the percentage of fatty content in a soap bar. Grade 1 requires a minimum of 76% TFM, Grade 2 requires 70–75%, and Grade 3 requires a minimum of 60%. A higher TFM generally means a milder, more moisturizing bar — but TFM says nothing about what else is in the soap. A Grade 1 bar can still contain parabens, SLS, artificial dyes, and synthetic fragrances. Natural handmade soaps go further: they use skin-loving oils and butters, retain naturally occurring glycerin that commercial manufacturers extract, and disclose every ingredient. For skin health, ingredient quality and glycerin retention typically matter more than TFM alone.

You've probably noticed it printed on the back of a soap wrapper: "TFM 76% — Grade 1." Sounds premium. But what does it actually mean for your skin? And does a high TFM make a commercial soap better than a natural handmade bar?

The short answer: not entirely. Here's the full picture.

What Is TFM in Soap? (And Why India Uses It)

TFM stands for Total Fatty Matter — the percentage of fat-derived ingredients in a finished bar of soap. The higher this number, the more fatty acids are present, and generally, the gentler and more moisturizing the soap is.

India's Bureau of Indian Standards (BIS) classifies toilet soaps into three grades based on TFM under IS 2888:

 

Most mass-market soaps you see advertised on TV in India fall under Grade 2. The "bathing bars" — products that look like soap but aren't technically classified as toilet soap — often have TFM below 50%, which explains why they can leave skin feeling tight and dry.

So yes, TFM is a useful starting point. A dermatology resource from Sahyadri Hospital confirms that Grade 1 soaps with higher fatty matter are less likely to strip skin's natural oils or cause dryness over time. It is worth checking on the label.

But here's the part of the story TFM doesn't tell.

 

The Blind Spot: What TFM Doesn't Reveal

TFM only measures how much fatty matter is in the soap. It says nothing about what else is in the bar alongside it.

A soap can carry a Grade 1 TFM of 80% and still contain:

• Synthetic fragrances — common triggers for contact dermatitis and skin reactions
• Artificial dyes and colors — linked to irritation in sensitive skin types
• Parabens — chemical preservatives that some skin types react to
• Sodium lauryl sulphate (SLS) — a harsh detergent that strips the skin's natural moisture barrier
• Chemical fillers — used to bulk up the bar and reduce production costs
• EDTA and PEG compounds — synthetic additives with no skin benefit

As Formulators Inc explains in their deep-dive on TFM standards, the BIS grading system measures fatty content — it does not assess the safety, quality, or transparency of everything else in the formula. Even a Grade 1 TFM soap can be loaded with additives that work against your skin.

This is exactly the gap that natural handmade soap is built to fill. Read our full breakdown of natural organic soap vs commercial soap if you want to go even deeper on this comparison.

 

What Makes Natural Handmade Soap Different?

Natural handmade soaps are made through cold-process saponification — plant-based oils and butters are combined with a lye solution and allowed to react at room temperature. The science behind this is straightforward: the reaction produces soap and glycerin naturally, while preserving the full nutritional profile of every oil used. Research on cold-process soap confirms this method retains beneficial properties that heat-based commercial manufacturing destroys.

At Salty Secrets, every bar is handcrafted in small batches in Jodhpur, Rajasthan using:

• Shea Butter — deeply conditioning, rich in vitamins A and E
• Coconut Oil — excellent cleansing with a rich, creamy lather
• Olive Oil — gentle, antioxidant-rich, ideal for sensitive and dry skin
• Castor Oil — enhances lather and adds a silky texture

Every bar is dermat-tested, 100% vegan, cruelty-free, and free from parabens and sulphates. That's not just marketing — it's the baseline for how we formulate every product in our handmade soap collection.

The Glycerin Advantage — The One Ingredient Most Commercial Soaps Remove

Here's something most people don't know, and it changes everything about how you evaluate soap.

Glycerin is a natural byproduct of saponification. Every time oils react with lye to make soap, glycerin is automatically created inside the bar. It's not added — it's produced by the soap-making process itself.

Glycerin is a humectant: it draws moisture from the air and holds it against the surface of your skin. Healthline's review of glycerin in skincare notes it helps lock in the skin's natural moisture, can ease symptoms of dryness and dermatitis, and is suitable for sensitive skin because it contains no alcohol or harsh chemicals.

So why don't you experience these benefits when you wash with your daily commercial soap?

Because most large manufacturers extract the glycerin from the bar before it's sold. Glycerin is a high-value ingredient used in lotions, cosmetics, and pharmaceutical products — removing it from soap and selling it separately is simply more profitable.

What's left is a soap that cleans your skin, but one that's been stripped of the very ingredient that would help your skin stay soft, balanced, and hydrated after washing.

In every Salty Secrets bar, the glycerin stays exactly where it belongs. It's one of the main reasons people who switch to handmade soap often feel the difference from the very first wash — no tight skin, no dryness, just clean. Our blog post on the benefits of handmade soaps goes deeper on why this matters for everyday skin health.

5 Real Benefits of Natural Handmade Soap for Your Skin

1. Cleanses Without Stripping

Quality oils, butters, and retained glycerin work together to clean your skin without disrupting its natural moisture barrier. No tight feeling after your shower. No reaching for moisturizer the moment you step out.

2. Full Ingredient Transparency

With a handmade soap, you know exactly what's in it. No vague "fragrance" label that could represent dozens of undisclosed synthetic chemicals. No fillers. What you read on the label is what touches your skin.

3. Naturally Occurring Glycerin — Kept In, Not Extracted

This is the single biggest practical difference between a commercial soap and a natural handmade bar. Glycerin stays in. Your skin stays hydrated. It's that straightforward.

4. Formulated for Skin, Not for Shelf Life

Commercial soaps are engineered for long shelf life and mass production economics. Handmade soaps are formulated for skin — small batches, fresh ingredients, and no synthetic preservatives. See our guide on the best handmade soap for different skin types to find the right one for you.

5. A Self-Care Experience Worth Having

There's something genuinely enjoyable about using a soap shaped like a macaron, a cupcake, or a fruit slice that smells like a patisserie. Our dessert-inspired soap collection and whipped soaps turn an everyday routine into a small daily pleasure. That's not frivolous — that's what good self-care looks like. Read more about why whipped soaps are worth trying if you haven't already.

TFM Soap vs Natural Handmade Soap: The Full Comparison

So Which Soap Should You Choose?

If basic cleansing is your only requirement, checking for Grade 1 TFM (76%+) on the label is a reasonable filter — it tells you the bar isn't padded with water and cheap fillers.

But if you want skin that actually feels good — soft after washing, not just clean — then the fuller picture matters:

• Natural glycerin working for your skin every wash
• No parabens, SLS, or synthetic detergents
• Oils and butters you can recognize and trust
• A soap that's dermat-tested and genuinely vegan
• An ingredient list with nothing hidden behind "fragrance"

Natural handmade soap gives you all of that. Not because TFM doesn't matter — it does — but because TFM is one data point, and skin health is a bigger picture.

For summer skin specifically, our summer soap guide covers what to look for in warm-weather formulations, and the luxury summer soap range has options built for heat and humidity.

Experience the Difference with Salty Secrets

Every Salty Secrets soap is handcrafted in small batches in Jodhpur, Rajasthan by a women-led artisan team. Dermat-tested, 100% vegan, and made without parabens or sulphates — these aren't just label claims, they're the foundation of how every product is made.

Whether you're buying for yourself, looking for a genuinely memorable gift, or planning custom soaps for a wedding or event, there's a difference you'll feel from the first wash.

Browse our full collection, explore our pre-curated gift boxes, or read about luxury handmade soap gift sets for every celebration. And if you're unsure which soap suits your skin type, our post on 10 benefits of handmade soap is a good place to start.

Frequently Asked Questions

What does TFM mean on a soap label in India? TFM stands for Total Fatty Matter — the percentage of fat-derived ingredients in the soap bar. India's Bureau of Indian Standards classifies soaps as Grade 1 (76%+ TFM), Grade 2 (70–75% TFM), or Grade 3 (minimum 60% TFM). Higher TFM generally means a gentler, more moisturizing bar. Grade 1 is the best quality under the BIS toilet soap standard (IS 2888).

Is a high TFM soap always safe for skin? No. TFM only measures fatty content — not what else is in the soap. A Grade 1 TFM soap can still contain synthetic fragrances, parabens, SLS (sodium lauryl sulphate), artificial dyes, and chemical fillers. These additives can cause irritation, dryness, and sensitivity, particularly in people with reactive or sensitive skin.

Do natural handmade soaps have a TFM value? Natural handmade soaps made via cold-process saponification are formulated differently from mass-produced toilet soaps, so the same BIS TFM classification doesn't always apply directly. What matters more is the quality of the oils and butters used, whether natural glycerin is retained, and what's absent from the formula (no parabens, no SLS, no synthetic additives). All Salty Secrets soaps are dermat-tested and formulated without parabens or sulphates.

Why does natural handmade soap feel different from commercial soap? The main reason is glycerin. During cold-process soap making, saponification naturally produces glycerin inside the bar. Natural handmade soaps keep this glycerin intact; it acts as a humectant, drawing moisture to the skin with every wash. Commercial manufacturers typically remove glycerin from the bar and sell it separately — leaving a soap that cleans but doesn't condition or hydrate.

Are Salty Secrets soaps suitable for sensitive skin? Yes. All Salty Secrets soaps are dermat-tested, 100% vegan, cruelty-free, and free from parabens and sulphates, making them suitable for most skin types including sensitive skin. When trying a new soap, do a patch test on your inner wrist for 24 hours. For specific skin conditions like eczema or psoriasis, consult a dermatologist before switching products.

What is the best soap for dry skin in India? For dry skin, look for soaps that contain shea butter, olive oil, or coconut oil; retain natural glycerin; and are free from SLS and synthetic detergents. Natural handmade soaps that meet these criteria — including Salty Secrets' small-batch bars — are a consistently better choice for dry skin than commercial soaps that strip glycerin and use harsh surfactants.

What is the difference between a soap and a bathing bar in India? Under BIS standards, a toilet soap must meet minimum TFM thresholds (60% for Grade 3 and above). A "bathing bar" is a synthetic detergent product that doesn't meet these thresholds — TFM can be below 50%. Bathing bars tend to feel harsher and more drying because they're largely detergent-based rather than oil-based. Natural handmade soaps are true soaps made from oils and butters, not synthetic detergent bars.

 

Not sure which Salty Secrets soap is right for your skin? Get in touch with our team — we're happy to help you find the right match.