From: Clay (wcharmon@wt.net)
Date: 12/31/02-03:00:00 PM Z
Sandy:
My un-scientific two cents worth: I think the grain alcohol does the
same thing for coatings that your alcohol spritz does for your carbon
tissue making. It sort of evens things out and make a solution disperse
evenly. I think the idea of tween is to make a solution more easily
absorbed by the paper fibers. I'm not totally convinced that this is
good, as witnessed by the washed out appearance of an unsized salt
print. The best behaving paper (in terms of contrast and 'snap') in my
opinion is Platine, and it is not very absorbent. It seems heavily
sized and the solution stays on top for some time as you brush it. My
theory is that the alcohol just gets everything dispersed evenly and
smoothly as it slowly sinks into the paper. That is the same reason I
add some polyvinyl alcohol AND everclear to my mix when I use
platinotype: the PVA keeps the whole solution on the surface for a
longer time and inhibits absorption while the everclear makes
everything smooth. Of course, I may just be kidding myself.
Clay
On Tuesday, December 31, 2002, at 02:40 PM, Jeff Buck wrote:
> Sandy: I've never had a benefit worth writing about from Tween. The
> grain alcohol, on the other hand, is helpful, as discussed in other
> notes. -jb
>
> At 02:35 PM 12/31/2002 -0500, Sandy King wrote:
>> Don wrote:
>>
>>
>>>
>>> > I seem to get less streaking and a more even coat. It may be
>>> wishful
>>>> seeing, but it doesn't seem to hurt either. The brand of Everclear
>>>> I
>>> > use is called 'Rabbits Foot Lucky Placebo'
>>
>>
>> Everclear is available at most liquor stores in South Carolina by the
>> name Everclear. It is 200 proof, or very close to it, grain alcohol.
>> I suspect most liquor stores everywhere have something similar.
>>
>>>
>>> And what about using alcohol in other processes such as VDB,
>>> cyanotype or
>>> ziatypes?
>>
>>
>> I have not had any streaking issues with VDB or kallitype with the
>> papers that I use. On the other hand, I recall that Carl Weese
>> mentioned that he got some streaking with kallitype on Lenox paper. I
>> now have some Lenox paper so I am going to test it by adding a few
>> drops of Everclear to the sensitizing solution to see how it works as
>> compared to the sensitizer with no Everclear.
>>
>> I guess my question for those with some experience with both
>> Everclear and Tween would be how do they compare. Does one substitute
>> for the other?
>>
>> Sandy King
>>
>>
>>
>>
>
>
>
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