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William Henry Talbot’s photographic system involved placing the negative against a _____ treated surface that was then exposed to _____.

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Answer: chemically / sunlight

Step-by-step explanation:

User P Roitto
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It seems that you have missed the necessary options for us to answer this question, so I had to look for it. Anyway here is the answer. William Henry Talbot’s photographic system involved placing the negative against a CHEMICALLY treated surface that was then exposed to SUNLIGHT HEAT. Hope this answers your question.
User Terrell
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