Talalay Latex vs. Dunlop Latex
Not all latex is created equal. Talalay and Dunlop are the two processes used in mattress production. The Dunlop process was developed in 1929 and was the first method used to produce latex material for bedding.
As technology progressed, the Talalay process was developed by the Talalay family during World War II. The Talalay process is significantly more complex and costly, but produces softer, more buoyant and luxurious finished products.
So why is there such a difference? The Talalay process takes four times longer than Dunlop with two additional process steps—vacuum and flash freezing—which improve the consistency, quality and feel of the finished latex.
The vacuum evenly distributes the latex throughout the mold, allowing us to create precise and varied feels in the finished Talalay latex. A mattress is made more firm or plush based on how much latex is poured into the mold. With the Dunlop process there is little ability to vary the feel of the finished product because the liquid latex is poured onto a conveyor belt resulting in a dense piece of latex every time. The only way to soften the feel of Dunlop latex is to add “fillers” into the liquid latex formula, which can result in solid latex that is flaky and breaks down quickly.
The flash freezing step gives Talalay its consistent feel. Liquid latex is a suspension of rubber particles in water, like a shaken snow globe. Flash freezing prevents the latex particles from settling to the bottom while gelling into a solid product. This means that the resulting piece of solid Talalay latex has the same consistent feel from top to bottom, and side to side. The Dunlop process doesn’t utilize a freeze step. Therefore, the rubber particles settle to the bottom while the liquid latex is gelling into a solid form, resulting in a variation of feel from top to bottom.
Think of Talalay latex like a chocolate soufflé; although the process is long, the end product is a buoyant, airy, complex delight. Dunlop latex is more like a pound cake; tasty, but dense and flat in comparison.
Only the best pass our tests. Every single bed goes through compression and impact tests to ensure durability and consistency.
This test simulates the effect of body impressions on the latex after a person lies on the bed for extended periods of time. Latex mattress samples are compressed to 50% of their original thickness for 22 hours at 158 ° F. When removed, the percent loss in thickness is measured. The greater the loss thickness, the more likely the bed will take a body impression over time—which leaves you sleeping in a hole.
The impact test measures Indentation Load Deflection (ILD), a measure of firmness. The mattress core is ILD tested and then placed into a machine where a weight is dropped on the latex repeatedly for 24 hours. The product is then removed from the machine and allowed to recover for 24 hours. ILD is measured again. The greater the loss in firmness from first measurement to the second means the latex is more likely to breakdown over time. To ensure we produce the most consistent feeling products, Talalay Global ILD tests nine locations on every mattress core. We are the only manufacturer in the industry to do so.