What kind of performance does silicone need to have for the firmness and washability of silicone embossing?

What kind of performance does silicone need to have for the firmness and washability of silicone embossing?
Molecular weight and cross-linking density
Molecular weight: High molecular weight silicone (such as solid silicone) has longer molecular chains and stronger intermolecular forces. The structure is more stable after embossing and is not easily collapsed by external forces (such as scrubbing).
Cross-linking density:
Silicone with high cross-linking density (high degree of vulcanization) has a tight network structure formed by molecular chains, higher hardness and rigidity, and stronger "support" of embossed patterns;
Silicone with low cross-linking density (soft silicone) has good elasticity but weak support, which is suitable for shallow patterns or flexible embossing (such as baby teethers), and deep concave patterns are easy to deform.
Hardness (Shore A)
Hardness directly affects the firmness of the pattern:
High-hardness silicone (such as 60-80 Shore A): suitable for deep concave and complex three-dimensional patterns, such as industrial anti-slip mats and car mats, and not easy to collapse when washed;
Low-hardness silicone (such as 20-40 Shore A): soft texture, suitable for shallow patterns or scenes that need to fit curved surfaces (such as bracelet decorative patterns), but may be slightly deformed after long-term washing.
Tear strength and rebound rate
Silicone with high tear strength (≥15 kN/m) is not easy to crack the embossed edge due to friction (such as rubbing during washing);
Silicone with high rebound rate (≥70%) can quickly return to its original shape after being deformed by pressure, avoiding permanent collapse of the pattern after washing.