Hello there! That's a great question, as choosing the right foam is key to a comfortable and long-lasting sofa. The provided search results didn't contain specific information on this topic, so I'll answer based on general expertise in furniture making, keeping the Indian context in mind.
When it comes to sofa foam, density is the most important factor for durability. It's measured in kilograms per cubic meter (kg/m³). A higher density number means the foam is heavier and more durable, and it will keep its shape for much longer. It doesn't necessarily mean the foam will be harder; firmness is a separate quality.
For sofa seats in India, where furniture is often a long-term investment, you should look for a foam density of at least 32. However, for the best balance of comfort and longevity, a density of 40 is highly recommended for the main seating cushions. This 40-density foam, often called High Resilience (HR) foam, will prevent the seats from sagging quickly with regular use.
For the backrest and armrests, you don't need such a high density because they don't bear as much weight. A lower density foam, somewhere between 23 and 28, is perfectly fine for these areas. This also helps in making the back cushions feel softer and more plush to lean against.
So, to summarize, aim for 40-density foam for your sofa seats for excellent durability, and a 23 to 28 density for the back and arms for a comfortable, softer feel. Always ask your furniture seller to confirm the foam densities they are using
