what are the physical properties requirements for automatic oval printing machine silicone materials?

When the fully automatic oval printing machine uses silicone ink for printing, what are the physical properties requirements for silicone materials?
1. Hardness (Shore A)
Applicable range: 20-60 Shore A
Impact:
Too low (<20A): The silicone is too soft and easy to deform during printing, resulting in blurred edges of the pattern and difficulty in demolding (especially fine patterns).
Too high (>60A): Insufficient elasticity affects the fit with the substrate, resulting in uneven ink transfer, especially when printing on curved or concave and convex surfaces.
Recommended value:
Flat printing: 30-40A (taking into account elasticity and stiffness).
Three-dimensional/thick printing: 40-50A (reduce edge collapse).
2. Tensile strength and elongation at break
Tensile strength: ≥3MPa (to ensure that the silicone screen or rubber head does not break due to tension during printing).
Elongation at break: ≥300% (to avoid fatigue aging due to frequent stretching during high-speed printing).
3. Resilience
Requirement: Resilience time < 0.5 seconds (i.e., it quickly returns to its original shape after being pressed).
Impact: Poor resilience will lead to longer printing intervals (it is necessary to wait for the silicone to recover its shape), reduce production efficiency, and easily cause pattern ghosting.