[alt-photo] Re: New gum pigment

[Katharine Thayer]

Hmm, my question was whether the silver sheen comes through in the  
final print; I'm guessing from your answer that it's not.  I might  
have a slight quibble with your side comment about carbon black  
tending to warm.  There are several carbon blacks, which are all  
carbon ash from something organic being burned  but differ slightly  
because of what was burned to produce the carbon.   PBk 6, lamp  
black, I wouldn't say from my experience has a warm cast; if it has  
any cast at all it tends toward cool, but it might depend on brand.  
PBk7, furnace black (sometimes named carbon black) I don't think I've  
used.   PBk8, which is made from wood (burned willow branches or  
other twigs or vines) I haven't used either.  PBk9, another carbon  
black which still carries the name "Ivory black" because it used to  
be made from charred ivory although now it is entirely made from  
burned animal bones,  is quite warm in tone, in fact the ivory black  
I use prints as a nice rich chocolate brown in a medium  
concentration.  So it really depends on what "carbon black" you mean,  
whether a carbon black tends to a warm tone.  And as far as neutral  
blacks, the most neutral black I've used, currently my favorite  
black, is not a carbon pigment but iron oxide, PBk11.


On Jan 23, 2011, at 6:20 PM, Marek Matusz wrote:

>
> The silver luster is very visible when wet in the solution and it  
> is absolutely neutral grey in light tints. On the other hand the  
> other form of carbon, Carbon black (lamp black)  tends to be rather  
> warm.
> m
>
>
>> From: kthayer at pacifier.com
>> Date: Sun, 23 Jan 2011 14:45:15 -0800
>> To: alt-photo-process-list at lists.altphotolist.org
>> Subject: [alt-photo] Re: New gum pigment
>>
>> Hi Marek, this is a new one on me; I haven't tried it, but it
>> sounds intriguing. According to handprint, it has the silver luster
>> of graphite, which could be quite appealing. Have you noticed that
>> luster in your gum prints?
>>
>>
>>
>> On Jan 23, 2011, at 12:16 PM, Marek Matusz wrote:
>>
>>
>>>
>>>
>>>
>>> All,
>>> I just started doing gum with graphite pigment. I bought a tube
>>> from Danied Smith, it is called graphite grey. This is the pigment
>>> that is used to make pencils for those that are not very familiar.
>>> It is kind of silvery grey but it can be quite dark. It is really a
>>> beautiful alternative to lamp black. I am on a second gum layer and
>>> just realised that I have not preshrunk the paper. It is impossible
>>> to register the second layer. Oh well I will finish just to have an
>>> idea for the two pass tonality.
>>> Has anybody tried it?
>>> Marek
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>>
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