Re: [DIYbio] Using copper wire instead of stainless still on gel electrophoresis box

Simon, you are right. H (hard) grade pencils have higher clay than graphite content. B (black) is the other way around. And HB are the mid point in hardness with a 50/50 clay/graphite. In any case you should be able to find graphite bars wherever you can find artistic drawing stuff

El martes, 14 de enero de 2014 05:57:04 UTC+11, Simon Field escribió:

I don't have any experience with them.

But you may be incorrect about the H value -- harder pencils may have higher clay content and lower graphite content. Graphite is fairly soft. But I really don't know.

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On Sat, Jan 11, 2014 at 12:22 PM, Cathal Garvey <cathal...@cathalgarvey.me> wrote:

Simon,
How are "artist" graphite pencils? The sort that aren't wood-wrapped?
They look pretty crystalline. I'm assuming high-H value is higher graphite?

On 11/01/14 20:19, Simon Quellen Field wrote:
> Nathan --
> You might have had better luck using pyrolytic

> graphite<http://www.scitoyscatalog.com/product/GRAPHITE3.html>instead

> of the clay and graphite dust composite that pencil leads are made
> from. Pyrolytic

> graphite<http://www.scitoyscatalog.com/product/GRAPHITE3.html>is a

> pure crystal of graphite, grown at 1/1000th of an inch per hour in a
> chemical vapor deposition chamber.
>
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> On Sat, Jan 11, 2014 at 12:03 PM, Nathan McCorkle <nmz...@gmail.com> wrote:
>
>> On Sat, Jan 11, 2014 at 11:57 AM, Cathal Garvey

>> <cathal...@cathalgarvey.me> wrote:
>>> Graphite makes for a good quick fix, electrode-wise? Haven't tried this
>>> but it's often recommended for electrolysis experiments.
>>>
>>
>> Here's my experience with graphite rods from mechanical pencils for
>> salt-water electrolysis:
>> https://groups.google.com/d/msg/diybio/GWTrmC6vMfc/462lApYcnLcJ
>>
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