INDUSTRIAL FILM
This professional industrial film is designed for X-ray and gamma ray non-destructive testing of metal castings, weldments and aerospace parts. Available in three performance grades with ultra-fine grain, consistent batch quality and strict fog & gradient control to meet international NDT standards including ISO 11699 and EN584. Supported by stable 0.175mm blue-tinted polyester base, the film adapts to manual and automatic developing, with clear operation, storage and darkroom lighting guidance for long-term archive and on-site inspection.
Industrial Film
High-performance industrial film serves as the core consumable for industrial non-destructive testing via X-ray and gamma ray radiation. Manufactured under unified strict standards at SMTECHUP production workshop, this radiographic film delivers ultra-fine grain and stable imaging to detect tiny internal flaws inside all types of metal workpieces, covering lightweight alloys and thick high-density metal components.
Core Performance Advantages of This Industrial Film
Uniform coating technology eliminates uneven sensitivity between separate batches. Inspectors do not need frequent exposure parameter adjustments during continuous on-site testing. Extremely fine grain restores micro cracks, air holes and incomplete fusion inside castings and welds that low-grade film cannot capture clearly.
Rigid polyester substrate brings outstanding dimensional stability. No deformation or shrinkage occurs during chemical developing, ensuring precise flaw size measurement for quality acceptance reports.
Strict Technical Index Standards
| Testing Item | Standard Requirement |
|---|---|
| Maximum Base Fog Density | ≤0.3 |
| Minimum Gradient (Density=2.0 net value) | ≥3.8 |
| Minimum Gradient (Density=4.0 net value) | ≥6.4 |
| Maximum Granularity Value | 0.032 |
| Minimum Gradient-Granularity Ratio | 120 |
International Standard Matching Grade
| Film Grade | EN584-1:2006 | ASTM E1815-06 | GB/T 19348.1 | ISO 11699-1 |
|---|---|---|---|---|
| Standard Grade 1 | C3 | Class I | T2 | C3 |
| Medium Speed Grade 2 | C4 | Class I | T2 | C4 |
| High Speed Grade 3 | C5 | Class II | T3 | C5 |
Grade Differentiation & Application Scopes
| Film Grade | Core Characteristics | Main Inspection Scenarios |
|---|---|---|
| C3 Standard Grade | Medium speed, ultra-high contrast, fine grain for strict flaw identification | Low-density metal castings, aerospace structural parts, multi-layer film inspection |
| C4 Medium Speed Grade | Short exposure time, balanced contrast and grain performance | General metal welds, castings with medium wall thickness, on-site batch inspection |
| C5 High Speed Grade | Highest radiation sensitivity, shortest exposure cycle, stable uniform imaging | Thick-wall heavy metal components, low-energy ray field inspection, mass production NDT |
Stable Polyester Film Base Performance
The substrate adopts slightly blue-tinted polyester material with fixed thickness of 0.175 mm. Outstanding geometric stability avoids shrinkage and distortion during developing, so inspectors can measure crack size and defect area accurately on finished negatives.
The surface coating layer has strong scratch and abrasion resistance. Even frequent contact with lead screens will not leave permanent marks that interfere with flaw judgment under long-time field use.
Flexible Manual & Automatic Developing Support
This industrial film has good chemical tolerance, compatible with all mainstream general radiographic developing solutions available on the market. Users can pick manual tank processing or automatic roller developer based on workshop workflow layout.
| Processing Mode | Working Step | Temperature | Time Control |
|---|---|---|---|
| Manual Tank | Developing | 20°C | 5 min |
| Manual Tank | Fixing | 18~22°C | 5~10 min |
| Automatic Machine | Whole processing cycle | 26~28°C | 8~10 min |
Standard Storage & Operation Guidance
Storage Rules For Unused Film
Store sealed film cartons vertically inside dark cool warehouses. Control ambient temperature between 10–24°C and relative humidity at 40%–60%. Separate storage area from X-ray equipment, heat sources and volatile corrosive gas to prevent pre-fogging of unexposed stock.
Darkroom Safe Lighting Limits
Only dark-red filters with wavelength over 520 nm can be adopted, with bulb power below 15W and minimum 1.2m distance from film sheet. Long-time exposure under weak red light will still form light fog and cover tiny internal defects.
Long-Term Archive Performance
Fully processed, washed and dried negatives can be stored for up to 50 years under dry, clean, gas-free environments without obvious image fading, meeting long-term quality record retention requirements for machinery, aerospace and pressure vessel industries.
Frequently Asked Questions
Q1: Can this industrial film cooperate with lead screens and fluorescent screens for simultaneous exposure?
A: Yes, it matches standard lead intensifying screens and fluorescent screens perfectly. Users can select matched auxiliary screens according to workpiece thickness and ray energy to shorten exposure duration.
Q2: Will higher developing temperature cause serious overall fog on negatives?
A: Higher temperature only slightly lifts base fog value instead of deepening the whole image. Operators still need to strictly follow standard temperature range to maintain stable contrast performance.
Q3: Which industries rely most on this industrial radiographic film for routine inspection?
A: Pressure vessel manufacturing, aerospace component production, ship welding inspection, pipeline engineering and heavy machinery casting factories widely adopt this series film for daily non-destructive testing.
