Mechanical system for delivering controlled blood flow effects on set – pumps, tubes, and reservoirs that create realistic bleeding wounds, severed arteries, or gore effects.
What is a Blood Rig?
A Blood Rig is a mechanical system for the controlled delivery of artificial blood on set. It comprises pumps, reservoirs, tubing, and valves, enabling precise blood effects – from continuous oozing to pulsating arterial fountains.
Components
| Element | Function |
|---|---|
| Reservoir | Artificial blood container |
| Pump | Pressure generation |
| Tubing | Blood supply to wound |
| Valves | Flow control |
| Trigger | Activation |
| Nozzles | Spray pattern shaping |
Pump Types
| Type | Characteristics |
|---|---|
| Hand Pump | Simple, manually controlled |
| Electric Pump | Constant pressure |
| Pneumatic | High pressure, fast |
| Gravity | Natural, slow flow |
| Peristaltic | Pulsating, arterial-like |
Effect Types
| Effect | Rig Configuration |
|---|---|
| Oozing | Low pressure, narrow nozzle |
| Flowing | Medium pressure, open outlet |
| Splattering | High pressure, precise nozzle |
| Pulsating | Peristaltic, rhythmic |
| Fountain | Maximum pressure, wide opening |
Application Areas
| Scenario | Rig Type |
|---|---|
| Cut Wound | Gravity/Hand pump |
| Head Wound | Concealed reservoir |
| Arterial Injury | Peristaltic, pulsating |
| Amputation | High pressure, high volume |
| Mouth Blood | Special mouthpiece |
Setup
| Step | Activity |
|---|---|
| Planning | Effect design, determine volume |
| Preparation | Lay and conceal tubing |
| Positioning | Under costume/prosthetic |
| Testing | Test off-frame |
| Calibration | Adjust pressure/flow |
| Action | Trigger at the right moment |
Concealing the Technology
| Method | Description |
|---|---|
| Under Costume | Tubing along the body |
| In Prosthetic | Integrated system |
| Behind Set Elements | Run out of frame |
| Wireless Trigger | No visible cables |
Artificial Blood Considerations
| Factor | Adjustment |
|---|---|
| Viscosity | Thin for spray, thick for oozing |
| Color | Light for fresh, dark for venous |
| Temperature | Body temperature for realism |
| Volume | Calculate per shot |
Safety
| Measure | Description |
|---|---|
| Pressure Limiting | Define maximum pressure |
| Skin Compatibility | Test blood on actors |
| Slip Hazard | Floor covering |
| Cleanup | Prepare for set cleaning |
Advantages over Squibs
| Aspect | Blood Rig | Squib |
|---|---|---|
| Repeatable | Yes | No |
| Continuous | Yes | Single-shot |
| Safety | No pyrotechnics | Explosive |
| Control | Precisely controllable | Limited |
Challenges
| Problem | Solution |
|---|---|
| Air Bubbles | Bleed the system |
| Clogging | Check and clean nozzles |
| Timing | Rehearse, communicate |
| Volume | Large reservoir |
Costs (approx.)
| Element | Price |
|---|---|
| Simple Rig | €200–500 |
| Professional System | €1,000–3,000 |
| Artificial Blood (Bulk) | €50–150/5L |
| SFX Technician | €400–800/day |
Today
Blood rigs remain an essential tool for practical blood effects. The combination of control, repeatability, and realism makes them indispensable – from subtle injuries to over-the-top gore in horror and action.
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