PPD free hair dye is colour made without p-phenylenediamine, the compound behind most hair dye allergies. The plant route is henna and indigo. Henna gives red. Indigo layered over henna gives brown through to black. Neither carries PPD, and neither needs a peroxide developer to work.
What PPD is, and why people avoid it
PPD stands for p-phenylenediamine. It is in most permanent box dyes, and it does most of the work in the dark shades. It is not banned. Used correctly it colours hair well and it lasts.
The problem is that some people react to it. PPD is one of the more common causes of allergic contact dermatitis from cosmetics, and dermatology sources put the share of the population who react at roughly 1.5 percent. Most reactions are itching, redness or a rash along the hairline. A small number are severe enough to need medical treatment. Sensitivity also builds: someone can use the same dye for years and then react.
That is why patch testing is on the box. It is also why a market for PPD free colour exists at all.
What actually counts as PPD free
Two things get sold under this label and they are not the same.
The first is a chemical dye that swaps PPD for a close relative, usually toluene-2,5-diamine, sometimes written as PTD. It is a genuinely different molecule and some people who react to PPD do not react to it. But it belongs to the same chemical family, and cross reaction is common enough that dermatologists test for both. A PTD dye is PPD free by the letter. It is not chemical free.
The second is plant dye. Henna and indigo colour hair by binding to the hair itself rather than by opening the cuticle with ammonia and driving in a developer. There is no oxidative reaction, no peroxide and no amine dye. This is the version most people mean when they search for PPD free.
How the plant route colours hair
Henna on its own gives red. On light or grey hair it lands bright, closer to copper or orange than to auburn. On dark hair it is a warm tint rather than a colour change, because henna is translucent and cannot lift what is already there.
Indigo on its own gives almost nothing on most hair, and on grey it can go patchy blue. It needs henna underneath it. The henna step deposits colour into the hair shaft and gives the indigo something to hold onto, which is why the two-step method exists and why one-step blends behave less predictably on stubborn grey.
Run in sequence, henna then indigo, the result is brown through to near black depending on how long the second step sits. The colour also keeps deepening for a day or two after rinsing as it oxidises, so the shade on the first evening is not the final shade.
What plant dye will not do
It will not lighten. There is no bleach step, so you can go darker or warmer, never lighter. It will not give an ash or cool blonde. And it is not instant: the two-step method is two applications and a few hours, against forty minutes for a box dye.
Anyone selling plant colour as a like for like replacement for permanent chemical dye is overselling it. It is a different product with different results and a different customer.
The adulteration problem, and how to check
Here is the part that matters commercially. Some material sold as natural henna or as black henna has PPD added to it, precisely because pure henna cannot give black in one step and PPD can. Black henna body paint is the well known case and has caused serious burns.
So PPD free is not a property you can assume from the word henna on a sack. It is a test result. If you are formulating or reselling, ask for the lab report on the lot you are actually buying, and confirm PPD is tested for and absent. A supplier who cannot produce that is not selling you a PPD free ingredient, whatever the label says.
| What to ask for | Why it matters |
|---|---|
| PPD tested and absent, on your lot | The claim your label depends on |
| No added metallic salts | They react badly with later chemical services |
| Sieve or mesh size | Decides how smoothly the paste mixes and rinses |
| Crop year and harvest | Colour strength fades with age in storage |
| Microbial and heavy metal limits | Required for cosmetic use in the EU, US and Gulf |
Sourcing it in bulk
We grow, process and export henna powder and indigo powder from Sojat in Rajasthan, which is the district most of the world’s cosmetic grade henna comes from. Both are lines we mill ourselves rather than buy in and resell, so the specification you order against is one we control.
Every lot ships with a Certificate of Analysis. Minimum order is 50 kg on henna and 50 kg on indigo. We send a free sample before you commit, and we quote back within 24 hours with the grade, the packing and the price to your port. We ship to buyers in more than 60 countries, including brands in the US, Germany, Brazil and the Gulf who are building exactly this kind of clean label line.
Specifications, for buyers who order to a number
Henna is graded on dye strength and on sieve size, and indigo on colour strength. Both are stated on the Certificate of Analysis for your lot rather than assumed from a brochure figure, because both move with the crop and the milling. Tell us the numbers your formulation is written against and we will confirm what we can supply against them before you order.
Frequently asked questions
Is henna always PPD free?
Pure henna is. Material sold as black henna often is not, because PPD is added to force a black result that plant henna cannot give on its own. Treat PPD free as a test result on your specific lot, not as a property of the word henna.
Is PTD the same as PPD?
No, it is a different compound, and some people who react to PPD tolerate it. They are chemically related though, and cross reaction is common enough that dermatologists patch test for both. A PTD dye is PPD free but it is not a plant dye.
Can PPD free dye cover grey?
Yes, using henna first and indigo second. Henna alone turns grey copper or orange. The indigo step over the top takes it to brown or black. One-step blends are less reliable on hair that is fully grey.
Can plant dye lighten hair?
No. There is no bleaching step, so it only goes darker or warmer. If a customer wants to go lighter, plant colour is the wrong product and it is better to say so up front.
What is the minimum order for PPD free henna and indigo?
50 kg on henna and 50 kg on indigo. Send your grade, sieve, volume and destination country and we will quote within 24 hours, with a free sample first if you want to test before you commit.
Specs change with the crop, the season and the grade. Ask our export desk for a current lab report, the minimum order and a price to your port, and we will come back within 24 hours.