I got a call today from a woman who really wanted to buy an all Natural Latex bed, and she’d been to every online store and every retailer in her city, but felt uncomfortable about the information she had received, being quite confused and frustrated. By the time she got to me, I think she was pretty worn out. Having slept on a Natural Latex bed years ago, she knew what she was looking for, but could never figure out how the raw liquid latex was made into a solid, how it was transformed from a white thick liquid into a highly elastic and flexible solid…and what was with all of those holes in the finished Latex mattress? No one could seem to give her a solid answer, so I helped her out.
I told her that the reason for the holes in the mattress was quite straightforward. Natural latex needs the pincore holes, as they are called, to increase flexibility of the material, so it does not tear when rolled or handled. This adds a tremendous ventilation quality, too, that keeps the material bone dry, and thus providing all of the wonderful qualities like the inability for Natural Latex to harbor dust mites, mold, mildew, fungi, and bacterial organisms. True, there are some organic properties of Natural Latex, like its pH (level of acidity) that ward off these organisms, but keeping the material dry is by far the greatest contributor.
The pincore holes are built into the mold, looking like very long spikes, around which the liquid latex is vulcanized (“slow cooked”) in the metal mold, which is really quite like a gigantic waffle iron, leaving its imprint on the finished product. Ever made Belgian waffles or pancakes? Very similar process. Just don’t burn them, or they quickly become brittle, black, and highly inedible.
There are basically 5 steps in the Dunlop method of vulcanization that is used in our Natural Latex conversion from botanical liquid to semi-solid.
1. Compounding is the step where all of the liquid latex is combined into a large vessel just prior to pouring into the mold. The liquid is filtered to remove any particulate matter, like you would sift flour before baking.
2. Foaming and Gelling is the next step, where the liquid latex is frothed much like whipping cream, to incorporate as much air into the mixture as possible. The trick with the Dunlop method is to froth thoroughly (you know, the highest setting on the blender so to speak) so the mixture does not settle while in the mold still liquified.
3. Vulcanization is the next step, where the liquid latex has been poured into the mold, and is slow cooked so that the process from liquid to flexible “semi-solid” takes place. The heat applied is significant enough to “set” the material, remove the water, while at the same time, not scorching it..you know, again like a well cooked pancake.
4. Washing involves the vulcanized, now solid piece of Natural Latex being thoroughly rinsed to remove residual microscopic powdery latex proteins from the finished mattress core. Our production uses drinkable water to rinse the mattresses. During this process they are also repeatedly squeezed like a giant sponge, wrung out, rinsed, then wrung out again. The rinsing process makes the Natural Latex virtually hypoallergenic, and people with Latex allergies very rarely have any response while using our mattress (though we do advise doing a rub test, and when you purchase a mattress from us, we send you a piece before your mattress arrives to do this if you like). Once rinsed, the Natural Latex core is pristine, purified, and is 100% Natural Latex, botanically derived.
5. Drying is the final step before packaging and shipping, and involves passing the Natural Latex mattress cores through what looks like a gian pizza oven, only with high velocity moving air that is dry and warm, to remove any remaining water. After this step, the process is complete, and the mattress is ready for use!