918 Pad Printing Silicone is a medium-hard precision printing two-component RTV-2 silicone rubber designed for high-precision, fine-detail pad printing production. With a hardness of 28±2 Shore A, in the medium-high hardness range, the 918 offers good pad rigidity with minimal deformation, delivering sharp edges, no spreading, and no distortion when printing fine text and detailed patterns. It features moderate viscosity, good fluidity, easy operation, uniform ink transfer, and excellent wear resistance, making it the ideal choice for high-precision printing scenarios such as electronic components, instruments, and precision hardware. 
Key Features
Medium-Hard, Precision Printing — At 28±2 Shore A, good pad rigidity with minimal deformation, sharp edges and clear details for fine text and detailed patterns.
Sharp Edges, No Smudging — Fine and dense texture, precise ink transfer, clean pattern edges with no burrs or smudging, especially suitable for small text and thin lines.
High Wear Resistance, Long Life — Medium-high hardness combined with premium formulation, excellent wear resistance, long pad service life, suitable for high volume precision printing.
Moderate Viscosity, Easy to Process — Good fluidity, easy to pour and degas, producing fully formed pads with smooth bubble-free surfaces.
Stable Ink Pick-Up and Release — Uniform and consistent ink pick-up and release, stable printing results with minimal batch-to-batch variation.
Good Resilience, No Deformation — Recovers quickly after repeated pressing, no collapsing or softening even after long use.
Multiple Colors Available — Offered in red, yellow, white, and green to suit different production preferences.
Applications
Electronic components and integrated circuit marking
Instruments and measuring tool scale printing
Precision hardware and medical device marking
Mobile phone accessories and digital product fine logo printing
Eyeglass frames and watch parts pattern printing
Fine text, barcodes, and QR code printing
Hard plastic and metal surface high-precision printing
Scenarios requiring high edge and detail quality
Operating Instructions
Clean the pad mold thoroughly, apply release agent evenly, and place on a flat, stable surface.
Weigh component A and curing agent at the specified ratio. Stir component A well first, then add curing agent and mix thoroughly.
Pour the mixed silicone slowly into the mold to avoid air bubbles; vacuum degassing recommended for best results.
Cover with a board and demold after 2–4 hours at room temperature.
Note: The 918 is a medium-hard precision printing grade with relatively high hardness. Adding silicone oil is not recommended, as it will reduce hardness and wear resistance and affect precision printing results.
Packaging & Storage
Packaging: Iron drums in 5KG, 20KG, 25KG, and 200KG specifications.
Shelf life: 12 months when sealed and stored at 25°C.
Storage: Keep in a cool, dry place, sealed tightly, away from moisture.
Transportation: Shipped as non-hazardous goods.
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