Machineless perms

Three problems no amount of engineering could fix

By the early 1930s the electrical permanent waving machine had been refined for a quarter of a century. It worked. Makers had made it lighter, quicker and better insulated year on year, and it was still the largest capital item in most salons. Three of its problems, though, were structural rather than technical, and no further refinement could touch any of them.

It was expensive before a single client walked in. A salon bought its capability once, as equipment, and had to fill the appointment book to justify it. In a depression, with no credit available to a small shop, that is a wall rather than a hurdle.
It tethered the client. Period writers describe the overhead apparatus in the language of alarm, and it was the most photographed and most mocked object in hairdressing. It made a fashionable service look like a medical procedure, and a woman wired to a machine could not be moved, shampooed or worked around.
It needed a mains supply. Which a great many premises still did not have, and which no machine maker could supply.

Refining the machine could not solve any of that. The only way past was to stop using a machine at all, and the trade found two different ways of doing it within about two years of each other.

1931: a wave with no heat at all

At the Midwest Beauty Show in Chicago in 1931, Ralph L. Evans and Everett G. McDonough showed a heatless system. A bisulphite solution was applied to wound hair with no heat whatsoever, often left in overnight and taken down the next day. The trade called it the overnight wave.

It was slow and it was mild, and both of those were the point. It also pointed straight at where the entire trade would be in fifteen years: a wave produced by chemistry alone, at room temperature, with no apparatus of any kind. The overnight wave is the cold wave’s direct ancestor in principle even though the chemistry is not the same — sulphite reduction rather than thioglycolate — and the gentlest end of today’s menu still runs on sulphite for exactly the reason it did then. Slow and mild rather than fast. The sulfite perm covers what that chemistry does now.

Where the sources fall apart, and what I will not print

Two names recur in every account of this period, Evans and McDonough, and what they are credited with depends entirely on which source you open. General reference works give the 1931 Chicago demonstration of a heatless system. Cosmetology teaching texts describe the same two men introducing chemically heated pads instead, and date it differently.

My reading is that these are two different products roughly a year apart — one with no heat, one with chemically generated heat — compressed by later retellings into a single event. I cannot prove it, so I offer it as a reading rather than a fact, and I am not going to publish a second date I cannot stand behind. What can be stood behind is the show in Chicago in 1931 and the patent record from 1933 onward, and the rest of this page is built on the patents.

A sealed cartridge of quicklime

The system that actually took the market was the other one, and the chemistry in it is unglamorous and completely reliable, which is precisely why it was chosen.

Hair was wound and dressed with an alkaline waving lotion in the ordinary way. Over each curl went a small sealed pad containing powdered calcium oxide — quicklime. Moisture reached the powder through perforations in the envelope, the quicklime hydrated to calcium hydroxide, and the reaction gave out a considerable amount of heat, right there at the rod. No overhead apparatus, no wires, no clamps, no electrical supply. The client sat in an ordinary chair and could be moved.

United States patent 1,920,758, for a hair waving pad, names Everett G. McDonough of Mount Vernon, New York, is assigned to the Zotos Corporation of New York, and was filed on 4 January 1933 and granted on 1 August the same year. The specification describes an envelope containing an exothermic material, calcium oxide in powdered form, which when moistened will of itself generate heat sufficient to impart a permanent wave. It needs no electricity, no fuel and no skill to operate.

Two things people routinely get wrong

The lime was a heat source and nothing else. It was sealed in its envelope and was never meant to touch the hair. What softened the hair was the waving lotion applied at the wind — alkaline, ammonia-bearing, increasingly sulphite-based as the decade went on, and named outright as the waving agent in a later pad patent. The pad supplied the temperature. The lotion did the work. If you take one thing from this page, take that separation.

This is not the chemistry of a modern exothermic perm. The two share a principle and not a formula. A modern exothermic system is thioglycolate chemistry with an activator mixed into the lotion at the station, so the heat is generated inside the thing that is doing the chemical work. The 1930s system was a sealed lime cartridge sitting above an entirely separate alkaline lotion, and the two were never in contact. Same idea, different centuries, different molecules. What the modern version actually is, and when it is the right choice, is on the exothermic perm.

It is worth being blunt about why that distinction is the most likely thing on this page to get mangled. Both systems can be described in the same seven words — heat made chemically, on the head, at the moment of use — and that description is true of both and tells you nothing useful about either. A hairdresser who conflates them will reason about a modern activator as if it were an inert heat source, which it is not: the activator is part of the reducing system, and it changes the strength of what is on the hair, not merely its temperature.

The invention was about distribution, not about hair

Read the pad patents as commercial documents rather than technical ones and they say something the histories miss entirely.

McDonough’s stated improvement is not the chemistry at all. Quicklime hydrating is not new and he does not claim it is. His improvement is that the envelope’s perforations could be made in the factory and covered with a removable flap, so that finished pads could be manufactured, sealed, shipped and stocked ready for use. That is an invention about supply chains wearing a hair patent’s clothes.

The follow-ons make the same point. Patent 2,173,269 — James C. Brown, assigned to E. Frederics Inc. of New York, filed 29 April 1938 and granted 19 September 1939 — builds a layered pad of foil, insulation and absorbent paper around calcium oxide sealed in foil, and states that moisture entering the perforations produces the exothermic reaction which is to supply the heat for the waving operation. Patent 2,137,511, “Machineless Permanent Wave Device”, names Albert E. Sierad and ran from 21 January to 22 November 1938; it is a home unit, and its heating envelope is described as containing simply the usual powder which when wetted evolves heat.

In five years the self-heating envelope went from a patentable invention to “the usual powder”. Nothing dates a technology faster than a patent that stops bothering to explain it.

What this did to the trade is the part that still governs the room you sit in. A machine salon bought its capability once, as equipment. A machineless salon bought it continuously, one perm at a time. The barrier to entry collapsed and the running cost rose — and for a small or new salon in a depression with no access to credit, that is a trade worth making every time.

For manufacturers it was better than a gift. A machine sells once per salon and then competes with itself second-hand for twenty years. A pad sells again with every head. That shift — from selling hardware to selling chemistry by the box — is the model every texture brand still runs on, and it started here rather than with the cold wave. Zotos, which holds the 1933 patent, is the clearest surviving line from it.

I have looked for price data — per-pad cost, service price, how fast machineless took share — and found nothing systematic. I would rather leave that gap open than fill it with a number somebody would quote back at me for thirty years.

A crowded decade, attacked from both directions

The 1930s pad business was busy, and the interesting thing about it is that established machine makers and newcomers were coming at the same market from opposite sides.

Company	Came from	Documented by
Zotos Corporation	Waving chemistry	Holds the 1933 McDonough pad patent
E. Frederics Inc.	Machines, from about 1928	Holds the 1938 Brown pad patent
National Mineral Company	Face products, founded Chicago 1927	Trademark registrations of 1934 and 1935

E. Frederics is the machine-era firm buying its way into the consumable business, which is the defensive move. The National Mineral Company, founded in Chicago in 1927 and later to become Helene Curtis, is the newcomer moving in from cosmetics, which is the aggressive one. Its registrations are the most instructive documents of the decade: a hair waving solution mark filed on 24 September 1934, and a second filed on 20 May 1935 covering, in one registration, permanent wave pads and permanent wave machines and heaters.

One company, one filing, both technologies. That is not indecision. That is a business hedging in writing because nobody in 1935 knew which way it would go, and it is the honest picture of a transition that later histories draw as a straight line.

The British record on machineless specifically is thinner, and I will not pad it out. What is documented on this side of the Atlantic is chemistry rather than pads: Isidoro Calvete, the engineer behind the machine-era heaters, ran a company whose chemist brought sulphite and bisulphite reagents into its waving chemistry before leaving in about 1934. Genuine British research, in the right decade, on the right molecules — but research, not evidence about pads. That side of the trade is on Eugene and the British trade. Other 1930s machineless brands very probably existed here. I have not found a source I would put a name to.

Why this era vanished from the telling

The popular version runs: Nessler’s machine, then the cold wave, then the 1980s. The 1930s fall straight through the gap, and there are three reasons for it.

One

It was short

Roughly a decade from the first machineless waves to cold waving, which then took everything. A technology that owns a market for ten years and is then replaced does not get a chapter.

Two

The words are muddled

Machineless, heaterless and heatless are used interchangeably in secondary sources and should not be. Machineless appears in the period patent record and means no machine but still heat. Heatless belongs to the overnight wave, which used none. A merged vocabulary makes a merged story, and a merged story is easy to drop.

Three

It produced no icon

A waving machine is a museum object photographed a thousand times. A cold wave is a bottle. A machineless perm was a few paper pads binned at the end of the service, so there is nothing for a display case and nothing for a picture caption.

Then cold waving arrived and the reason to manage a heat source at all disappeared. Once a wave could be produced at room temperature with no heat source whatever, a sealed cartridge of quicklime was solving a problem nobody had any more, and the pads went inside about a decade.

What actually survives

Nothing on a modern menu is a machineless perm in the 1930s sense. The quicklime pads are gone and so is the chemistry they heated. What survives is structural, and it is everywhere.

The chair you sit in is the first thing. This is the decade in which perming stopped happening at a fixed installation and started happening at any chair, and every salon layout since has assumed it. Self-heating perming survives as a category, in the modern exothermic system that mixes an activator into the lotion at the station. Mild sulphite chemistry survives at the gentlest end of the menu, doing the overnight wave’s job for the overnight wave’s reason. And most importantly, heat survives as a variable rather than a fixture: cold, exothermic and machine-heated systems still sit side by side on a modern price list, and the digital hot perm is the current answer to the same question this decade first asked. This is where the trade learned that heat was a choice.

The last inheritance is a caution rather than a technique. When a system arrives that removes the frightening object from the room, the trade adopts it fast and stops asking what else changed. The pads removed the machine and left both real risks exactly where they were: a strong alkaline lotion against the scalp, and a genuine heat source held against the head. Removing the thing clients were afraid of is not the same as removing the thing that hurts them, and I have watched that lesson need relearning more than once since 1991.

Questions

What was a machineless perm?

A 1930s permanent wave that used no electrical machine. The hair was wound and dressed with an alkaline waving lotion, then a small sealed pad containing a heat-producing chemical was placed over each curl. Moistening it started a reaction that gave out heat at the rod, doing the machine heaters’ job with no wires, no clamps and no mains supply.

What chemical made the pads heat up?

The period patents specify calcium oxide, better known as quicklime, in powdered form. When water reaches it through perforations in the envelope, the quicklime hydrates to calcium hydroxide and the reaction releases a considerable amount of heat. The powder was sealed in its envelope and supplied heat only. The hair was softened by the separate waving lotion applied at the wind.

Is a machineless perm the same thing as a modern exothermic perm?

They share the principle, not the chemistry, and this is the thing most worth getting right. Both make heat chemically, on the head, at the moment of use. But a modern exothermic system is thioglycolate chemistry with an activator mixed into the lotion, so the heat comes from inside the working solution; the 1930s system was a sealed lime heat pad sitting above a separate alkaline lotion, never in contact with it. Treating a modern activator as an inert heat source is a genuine mistake — it changes the strength of what is on the hair, not just its temperature.

Was the machineless perm safer than the machine perm?

It removed the electrical hazards and the weight of the overhead apparatus, and it let the client sit in an ordinary chair. It did not remove either of the two real risks: a strong alkaline lotion against the scalp, and a genuine heat source held against the head. Period practice depended entirely on the operator following the maker’s instructions on lotion strength, placement and timing.

Why did the machineless perm disappear so quickly?

Because cold waving arrived. Once a wave could be produced at room temperature with no heat source at all, the reason to manage a heat source vanished and the pads went with it, inside roughly a decade. It also left nothing behind to remember it by: the pads were disposable, so there is no museum object and no photograph.

Can I still see or buy a machineless perm today?

No, and period stock should not be put back into use. The pads were disposable so almost none survive, and the chemistry has been superseded twice over. There is also a specific reason not to open up antique pads found in a salon clearance: at least one 1930s pad patent specifies asbestos as the insulating layer. Anything of that age should be left intact and disposed of through the proper waste route.

Why does a forgotten decade matter to a client in 2026?

Because you are sitting in its result. A perm happening in an ordinary chair, with the heat — if any — made at the rod rather than delivered down a wire from a machine, is a 1930s invention rather than the natural order of things. So is the fact that what your salon buys from a manufacturer is a box of consumables rather than a piece of equipment, which is a large part of why the service is priced the way it is.