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What is a fixative? How and why must a fixative be used on fingerprints revealed by iodine furning?

User Thewaywewere
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1 Answer

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6 votes

Answer: When your finger is pressed down onto the paper, oils from the skin are transferred to the paper. These oils then react with the iodine vapor, producing a brown color that traces the fingerprint.

that is what fixative is

Step-by-step explanation:

User Nielsv
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