How to test if latex mattress is still good / needs replacement

Hi,
Any suggested methods of testing if a latex mattress’ time is done?

I figured out one method (calling it the perpendicular edge sink test!):
I lied on the mattress on my back in the perpendicular direction at both edges separately: feet and head. For both I felt my body tilting inwards towards the middle of the bed, which can only mean the middle was softer than the edge. Doing the same in the natural direction edge did not have this impact. The foot and head sections also actually felt firmer. I tried this for the various latex layers as I have 3. However I think this method may not be accurate for slimmer layers/toppers. It clearly identified my 5" layer to be softer in the middle (bye bye layer).

Any better ways to test for firmness consistency or if the latex mattress expired its lifetime?

Thanks!

Hi Zordex and welcome to the forum! I’m so sorry for the delay! I’d be happy to answer your questions but I would like to ask a couple of questions first: how long have you had it and what type of latex is it?

5" Ikea Latex: > 10 years old (just got rid of it)
3" Dunlop from 2010, Sleep EZ (likely done)
3" Tanalay from 2016, Sleep EZ
3" Tanalay new 2020, Pure Green)

But my question is more generic: any somewhat scientific way to test a layer’s firmness as opposed to just squeezing it with hands it different spots and guessing?

Thanks!

OK great thank you for the information. So I contacted the latex manufactures that made all of those layers and they all let me know that there is no standard way that they know of for testing how much the latex has softened. They each use ILD testing machines that cost $25,000 or more and they just don’t know of any good method for the consumer to test for softening at home.

Here is one way you can do it: https://youtu.be/bcGqaQYZ3oo?t=319

Compare the area in the middle where your hips are with the area near the edge. Try different weights.