Professional photo film splicing tape with aggressive rubber adhesive, polyester backing, and superior chemical resistance for continuous web processing applications.
3M™ Photo Film Splicing Tape 8421 is a professional-grade creamy white splicing tape specifically designed for photographic film and web processing applications. Featuring a thin yet durable polyester backing, this tape delivers exceptional performance in demanding industrial environments. The aggressive rubber adhesive provides high tack and excellent grip on a variety of film types, ensuring reliable splicing results in continuous production processes.
This specialized tape is engineered with superior solvent and chemical resistance, making it ideal for use throughout photographic developing processes where exposure to harsh chemicals is common. The white backing provides clear visibility for splice identification, while the polyester carrier material offers additional abrasion protection for sealing, edging, and color-coding applications. With a total thickness of 2.5 mil and dimensions of 12 inches wide by 360 yards long, this single roll provides substantial coverage for extended production runs.
The tape maintains exceptional flexibility at extreme temperatures, remaining pliable at -60°F (-50°C) while maintaining dimensional stability up to 300°F (150°C). With high shear strength and superior adhesion characteristics, 3M Photo Film Splicing Tape 8421 is the preferred choice for professional film processing facilities, web printing operations, and industrial applications requiring reliable, consistent splicing performance.
Key Features
- Aggressive rubber adhesive grabs quickly and adheres well to a variety of films
- Excellent solvent and chemical resistance for photographic processing environments
- White backing for easy splice identification and visibility
- Remains flexible at -60°F (-50°C) and dimensionally stable up to 300°F (150°C)
- Durable polyester backing provides abrasion protection and additional strength
- High shear strength and superior adhesion for reliable splicing
- Suitable for butt splicing, core starting, and defect marking applications
- Professional-grade tape for industrial film and web processing
Technical Specifications
| Specification |
Value |
| Product Number | 8421 |
| UPC | 00051115817847 |
| Overall Width (Imperial) | 12 inches |
| Overall Width (Metric) | 304.8 mm |
| Overall Length (Imperial) | 360 yards |
| Overall Length (Metric) | 329.18 meters |
| Total Tape Thickness (Imperial) | 2.5 mil |
| Total Tape Thickness (Metric) | 0.06 mm |
| Backing Material | Polyester |
| Backing Thickness (Imperial) | 1.4 mil |
| Backing Thickness (Metric) | 0.04 mm |
| Adhesive Type | Rubber |
| Adhesive Thickness (Metric) | 0.04 mm |
| Product Color | Red |
| Adhesion Strength (Imperial) | 50 oz/in |
| Adhesion Strength (Metric) | 54 N/100mm |
| Tensile Strength (Imperial) | 43 lb/in |
| Tensile Strength (Metric) | 754 N/100mm |
| Elongation at Break | 140% |
| Minimum Operating Temperature (Fahrenheit) | -60°F |
| Minimum Operating Temperature (Celsius) | -50°C |
| Maximum Operating Temperature (Fahrenheit) | 300°F |
| Maximum Operating Temperature (Celsius) | 149°C |
| Product Form | Roll |
| Quantity per Case | 1 Roll |
| Brand | 3M |
| Application | Photo Film Splicing |
| Recommended Use | Industrial/Occupational Use Only |
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