Baggage scanner colour codes are specifically related to the images of the targets visible on the monitor. The scanned targets appear as colour pallets on the monitor and each colour have significance. The tone of the colour decides the material and possible threats.The X rays see exactly what is in luggage but that is coded in colours visible on the monitor to the operator. In general the airport X-ray scanners produce images in orange, blue and green. Each colour corresponds to a material category viz.a.viz
- Orange represents organic material (food, paper, marijuana),
- Green represents medium-dense non-organic materials like plastic soda bottles,
- Blue represents metals or hard plastic
Each colour and its combination is associated with the specific Z number, technically Z number is an atomic number or proton number of the chemical element amounts to the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies chemical elements.
Six baggage scanner colour codes are used extensively now a day’s compared to three colour codes as six colour codes provide precise methods for the threat detection and can help easily identify the targets.
The comparison of three and six colour codes are mentioned in the below table.
|3 Colors||6 Colors||Z Number||Examples||Material type||Possible threats|
|Orange||Brown||0-8||Wood, Oil||Organic||C-4, TNT, Semtex|
|Orange||Orange||8-10||Paper||Low Organic||Cocaine, Heroin|
|Green||Green||12-17||Aluminium, Silicon||Light Metals||Gunpowder, Trigger devices|
|Blue||Blue||17-29||Iron, Steel||Heavy metals||Guns, bullets, Knives|
|Blue||Violet||29+||Gold silver||Dense metals||High value contrabands|
|Black||Black||—||Lead||Impenetrable||Shielding for above threats|
Now it is clear that the image colours are decoded to identify the material present in the scanned target. And this way the threats are nullified.