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4 votes
2 answers
548 views

I left scented candles in a polypropylene container. How do I remove the smell?

5 votes
2 answers
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A solution is cloudy at lower concentration and becomes clear at higher concentration. Why?

5 votes
0 answers
11k views

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-1 votes
3 answers
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Repairing acetone damage and discoloration to plastic

3 votes
6 answers
342 views

Removing carbon matter from molten beeswax

1 vote
1 answer
49 views

Nafta vs petrol

4 votes
1 answer
9k views

What happens when isopropyl alcohol expires?

0 votes
1 answer
56 views

About whitish layer that formed on chocolate bar

2 votes
1 answer
132 views

Purpose of sulphuric acid in archaic matchboxes

1 vote
2 answers
86 views

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5 votes
1 answer
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1 vote
1 answer
156 views

How would you test for ppm of lead in a powder?

238 votes
1 answer
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Why can we smell copper?

7 votes
1 answer
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Creating resilient (non-brittle non-water-soluble) verdigris (blue-green copper patina)

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