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Ask iit jee aieee pet cbse icse state board community Community Discussion Question: pencil
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umang (229)

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What is the % of lead in a pencil ???

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master_purav (1343)

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I dont think it contains lead. Its completely made of Graphite...

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nunoxic (1469)

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i dunno for sure but it is very little quantity...not negligible but little...the greasy feel of the pencil is because of graphite (and also the ink)

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aditya_arora04 (1077)

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Pencils are not made of graphite. they are made of lead
 
At least, that is what i think !!!
 
But, please correct me if i am wrong !!!!!
 

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nunoxic (1469)

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Pencil Number
Graphite
Clay
Wax

9H
41%
53%
5%

8H
44%
50%
5%

7H
47%
47%
5%

6H
50%
45%
5%

5H
52%
42%
5%

4H
55%
39%
5%

3H
58%
36%
5%

2H
60%
34%
5%

H
63%
31%
5%

F (Fine Point)
66%
28%
5%

HB
68%
26%
5%

B
71%
23%
5%

2B
74%
20%
5%

3B
76%
18%
5%

4B
79%
15%
5%

5B
82%
12%
5%

6B
84%
10%
5%

7B
87%
07%
5%

8B
90%
04%
5%

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master_purav (1343)

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That is a lot of info.

Good work nunoxic...

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umang (229)

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Hey all !
It was a very easy question and u all got confused !!!
The answer is 0% because pencil is not at all made of lead !!!!!
The correct composition , as nuxoric has explained is clay , graphite and wax .
And nuxoric , thanks for the information !!!

Umang
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nunoxic (1469)

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no probs dude...

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umang (229)

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where did u get all this ????

Umang
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pragna (30)

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umang, u aware of dis extremely famous thing called the INTERNET ???

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nunoxic (1469)

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its the site that knows everything

www.wikipedia.com

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Anjishnu (25)

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why so much fuss over pencil lead?????????
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Arjun (812)

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nic reply nunoxic!!!!!!

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