Quick answer: TFM in soap means total fatty matter, the share of a bar that comes from soap and fatty acids. Under India's BIS standard IS 2888:2004, Grade 1 toilet soap needs at least 76 percent TFM, Grade 2 needs 70 percent and Grade 3 needs 60 percent. For dry skin, a Grade 1 bar is a sensible starting point, but TFM alone doesn't tell you how gentle a soap will feel.
Turn over almost any soap wrapper in an Indian shop and you'll find a small line that says "Grade 1" or "TFM 76%." Most people never read it. The ones who do usually aren't sure what it means.
Understanding TFM in soap is worth the two minutes, especially if your skin is dry. That one number explains why two bars with the same smell and the same price can feel completely different on your arms.
This guide is written from inside a certified soap base manufacturing facility in Nimbri, Panipat. We talk about fatty matter, glycerin and alkali with soap brands every week, and the TFM question comes up more than any other once someone starts reading labels.
Here's where people go wrong. They treat TFM like a purity score, as if a higher number always means a better soap. It's closer to a measure of how much real soap is in the bar. That matters, but it's not the whole story.
What is TFM in soap?
TFM stands for total fatty matter. When oils and fats react with alkali, they turn into soap. In the lab, a sample of the bar is treated with acid to turn that soap back into fatty acids, and the fatty acids are weighed. The result, as a percentage of the bar, is its TFM.
So a bar with 78 percent TFM is mostly soap. The rest is water, glycerin, fragrance, colour, fillers or other additives. A bar at 60 percent has a lot more of everything else.
What do Grade 1, Grade 2 and Grade 3 mean?
The grades come from BIS standard IS 2888:2004 for toilet soap. Grade 1 needs a minimum of 76 percent TFM. Grade 2 sits at 70 percent minimum. Grade 3 needs at least 60 percent.
The same standard sets limits on leftover alkali. Free caustic alkali, the unreacted lye that would sting, is capped at 0.05 percent. Free carbonated alkali is capped at 1.5 percent. A soap made properly to the standard shouldn't burn, whatever its grade.
Higher grades tend to lather richer and feel less drying, because there's more real soap and fewer fillers. That's why dermatologists and soap makers often point people with dry or sensitive skin toward Grade 1.
Is a higher TFM soap always better for dry skin?
Usually, but not always. Three things can break the rule.
First, pH. Even a Grade 1 soap is alkaline, usually around pH 9 to 10. Healthy skin sits below pH 5, according to a 2006 study by Lambers and colleagues in the International Journal of Cosmetic Science. A very high TFM bar can still leave tight skin if you lather for too long. Our explainer on whether soap is an acid or a base covers the chemistry.
Second, glycerin. A bar with slightly lower TFM but plenty of retained glycerin can feel softer than a dense, glycerin-stripped Grade 1 bar. The TFM number doesn't count glycerin at all.
Third, fragrance. A heavily perfumed Grade 1 soap can irritate dry skin more than a plain Grade 2.
What about bathing bars?
Many products sold in India are labelled "bathing bar," not "toilet soap." These fall outside the IS 2888 grading. They often contain around 40 percent fatty matter and use synthetic detergents for much of their cleaning power.
That isn't automatically bad. Some syndet bars are very mild. But it does mean you can't compare a bathing bar's TFM with a toilet soap's and draw a conclusion. Read the ingredient list instead.
Where do melt and pour soap bases fit?
This surprises people. Melt and pour bases are real soap, but they're built to remelt, so they contain added glycerin, sorbitol, water and sometimes propylene glycol. Those ingredients bring the TFM below what you'd see on a dense commercial bar. Clear bases usually carry more of these solvents than opaque ones.
That lower number doesn't make them harsh. The extra glycerin is a big part of why handmade melt and pour bars feel gentle. If TFM matters for a product claim you plan to print, ask your supplier for the Technical Data Sheet rather than guessing.
Ultra White Soap Base. Our ultra white soap base is opaque and dense, and it gives even colour across a batch. It's rated 4.67 out of 5 from 6 reviews and is a common choice for brands that want a consistent, solid looking bar.
Extra Clear Melt and Pour Soap Base. At the other end, the extra clear melt and pour soap base is glass-like and holds embeds well. It carries more glycerin, which helps hydration, and it holds a 4.88 rating across 8 reviews. Wrap these bars promptly, since glycerin pulls moisture from humid air.
How do you read a soap label for dry skin?
Start with the grade or TFM line. Grade 1 is a good default if you're buying ready soap. Then check whether it says toilet soap or bathing bar.
Next, scan the ingredients. Butters, milk, glycerin and plant oils near the top are good signs for dry skin. Fragrance listed high up is a reason to be cautious. Deodorant or antibacterial claims usually mean the bar is meant for odour control rather than comfort.
If you'd rather skip labels and control everything yourself, our main guide to the best soap for dry skin explains which bases and add-ins to start with.
Does TFM matter if you're selling soap?
Yes. TFM in soap becomes a legal matter once you sell. If you sell toilet soap in India and print a grade, the bar has to meet that grade. Packaged soap also needs proper labelling under the Legal Metrology (Packaged Commodities) Rules, 2011, and cosmetic manufacture falls under the Cosmetics Rules, 2020. Our guide on moisturizing soap base for private label walks through what a small brand needs to check.
How do you buy soap base in India?
RV Organica ships across India from Nimbri, Panipat, Haryana 132104, under parent entity RV International. Shipping is free above ₹999, and the code FIRSTORDER works for first time buyers. We're GMP and ISO 22000 certified and hold nine certifications in total, including WHO-GMP, Halal, Kosher, HACCP and MSME recognition. A COA and the full INCI ingredient list are available on request.
For technical questions or bulk quotes, email info@rvorganica.com or call +91 8937003005. Every base we make is listed in our melt and pour soap base collection.
What do people ask about TFM in soap?
Which No. 1 soap is best for skin?
There's no single number one. A Grade 1 toilet soap, with at least 76 percent TFM, is the best general category for most skin. Within that, pick a mild, lightly scented bar that suits your skin type.
What soap is 99% pure?
That phrase comes from an old American advertising line for Ivory soap, which claimed to be "99 44/100% pure." It was a marketing claim, not a technical grade. In India, TFM and the IS 2888 grade tell you far more.
What is a good TFM for dry skin?
For ready made toilet soap, 76 percent or more, which is Grade 1. Handmade melt and pour bars can sit lower and still feel gentle because of their glycerin.
Is glycerin soap low in TFM?
Often, yes. Clear glycerin soaps include solvents and humectants that lower the TFM. They're still mild for most people because glycerin helps skin hold water.
Where can I find the TFM on a soap?
Check the back or side of the wrapper. Most Indian toilet soaps print the grade, the TFM percentage or both. If you can't find either, the product may be sold as a bathing bar.
Final thoughts
TFM is a useful first filter. Grade 1 tells you the bar is mostly real soap, not filler. It won't tell you about fragrance, pH or glycerin, so read the ingredients too. These observations come from working inside a certified manufacturing facility, and the advice we give most often is to treat the grade as a starting line, then judge the bar on your own skin.
About the Author
Parth Kundu is an Essential Oils Expert at RV Organica, where he has written about essential oils, carrier oils, soap bases and cosmetic raw materials since 2025. He works alongside the production and quality teams at RV International's facility in Nimbri, Panipat, Haryana. RV Organica holds nine certifications including WHO-GMP, Halal, Kosher, HACCP and MSME recognition, plus ISO 22000.
