Most agree that the plushest and most comfortable natural latex is the Talalay process because of its consistency and feel, both in the core and the topper layer.
First, the raw liquid latex is whipped with curing agents and additives into a froth. Next, the appropriate amount of latex froth is injected into the mold. All of the air is then vacuumed out causing the latex to expand and perfectly distribute itself throughout the mold.
The latex is then flash frozen to -20F to prevent any settling that may occur. Carbon Dioxide (CO2) is then introduced to cause the mixture to gel. Finally, the latex is vulcanized at a temperature of 220F until it has cured.
The Dunlop latex process...
The Dunlop process is the original latex process. The latex is frothed and the mold is filled to the brim, without the vacuum or freezing stage, used in the Talalay process. The Dunlop process can create a firmer feeling, denser product, with a somewhat less even distribution of latex. although the frothing process has been much improved in recent years.
As the Dunlop process as been refined, a Dunlop latex mattress provides all of the benefits of 100% natural latex, at a lower cost, while still providing the unequaled comfort that has made the latex mattress so popular.