Page 36 - Veritas Vol 3, Issue 2
P. 36
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4. Sample (Saliva)
Biological Fluid
UV light, heat, and chemical methods.
Results & Discussion
Each sample was visualised by heat, UV light, and chemical methods. A
brownish colour appeared after the sample samples were heated with an electric
iron, revealing the secret information in the writings. After observing samples
under UV light, the hidden message was decrypted by producing a blue
fluorescence. Samples were treated with different chemical methods, such as:
Samples
Chemical methods used
Observations
1.Sample (Milk)
Phenolphthalein
Iodine
No Change
The writing revealed a brown colour.
2. Sample (Lime Juice)
Phenolphthalein
Iodine
No Change
The writing revealed a purple colour.
3. Sample (Baking soda)
Phenolphthalein
Iodine
No Change
The writing revealed a pink colour.
4. Sample (Saliva)
Phenolphthalein
Iodine
No Change
The writing revealed a brown colour.
VERITAS VOLUME: 3, ISSUE: 2 WRITER: ANOHA ANN CHERIAN
