Artificial Blood Formulation for Forensic Spatter Analysis
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Solution Overview
Problem
Existing artificial blood for forensic science experiments faces challenges such as user resistance, safety concerns, and differences in physical characteristics from human blood, particularly when reproducing an expectorated blood spatter.
Innovation Solution
A formulation of artificial blood comprising maple syrup, water, and food coloring, with specific volume and mass ratios, is developed to reduce user resistance and ensure safety while mimicking the physical properties and bloodstain shapes of human blood.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If human blood or animal blood is used for bloodstain reproduction experiments, then the physical characteristics and bloodstain shapes are accurate, but user resistance and safety issues arise
Solution Approach 1:
The patent creates an artificial blood composition that copies the essential physical properties of human blood (viscosity, color, flow characteristics) using safe alternative materials. The maple syrup-water-food coloring mixture replicates blood's rheological behavior without the safety hazards of using actual biological blood, allowing experimenters to handle and spit the substance safely while still achieving accurate bloodstain pattern reproduction.
Solution Approach 2:
The patent modifies the physical parameters of the artificial blood composition (viscosity, color intensity, flow properties) to match those of human blood. By adjusting the maple syrup to water volume ratio and food coloring concentration, the artificial blood achieves blood-like viscosity and color characteristics, enabling accurate trajectory estimation and bloodstain shape reproduction while maintaining safety.
2Object-affected harmful factors
If existing artificial blood is used, then safety issues are reduced, but physical characteristics differ from human blood and price burden increases
Solution Approach 1:
The patent systematically adjusts the physical parameters of the artificial blood by modifying the maple syrup concentration, water content, and food coloring dosage. This allows precise control over viscosity, color, and flow characteristics to match human blood, overcoming the limitation of existing artificial bloods that have noticeable differences in physical properties.
Solution Approach 2:
The patent combines multiple materials (maple syrup, water, food coloring) in specific proportions to create a composite artificial blood that replicates the complex physical properties of human blood. This composite approach allows independent optimization of each component's contribution to viscosity, color, and flow behavior, achieving superior physical characteristic matching compared to single-substance artificial bloods.
3Measurement precision
If artificial blood with high viscosity is used, then bloodstain shape accuracy improves, but user resistance increases
Solution Approach 1:
The patent optimizes the viscosity parameter of the artificial blood by adjusting the maple syrup to water ratio. The formulation achieves a viscosity range that is sufficiently high to produce accurate bloodstain shapes and trajectories, yet low enough to allow comfortable handling and spitting by experimenters, resolving the contradiction between accuracy and ease of operation.
Data Source
AI summary
Artificial blood for reproducing an expectorated blood spatter according to an embodiment includes maple syrup, water, and food coloring.