[alt-photo] Re: tricolor gum problem

[jusdado]

El 09/09/12 19:36, Don Bryant escribió:
> As  I've written before I use a foam roller and a badger hair brush.
>
> Don
>
>
> -----Original Message-----
> From: alt-photo-process-list-bounces at lists.altphotolist.org
> [mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf Of
> Paul Viapiano
> Sent: Sunday, September 09, 2012 1:25 PM
> To: The alternative photographic processes mailing list
> Subject: [alt-photo] Re: tricolor gum problem
>
> A foam roller does wonders for this. Just keep rolling until the fish eyes
> are gone...
>
>
> ----- Original Message -----
> From: "Don Bryant" <donsbryant at gmail.com>
> To: "'The alternative photographic processes mailing list'"
> <alt-photo-process-list at lists.altphotolist.org>
> Sent: Sunday, September 09, 2012 9:20 AM
> Subject: [alt-photo] Re: tricolor gum problem
>
>
>> Ahh the old fish eye problem.
>>
>> I use a badger hair brush to eliminate the gaps from the fisheyes in the
>> magenta coating.
>>
>> I burnish the surface of the print lightly with the brush as though I was
>> polishing a leather shoe or boot. This is after the fresh coating has
>> setup
>> for a minute or two.
>>
>> Also note I ensure the magenta pigment is thoroughly blended with the gum
>> and dichromate. For that I use a dremel tool with a custom stainless steel
>> brush attachment which I made to quickly make a homogenous solution. But
>> do
>> avoid blending to long. Extended blending will induce frothing and
>> excessive
>> air bubbles.
>>
>> Good luck,
>>
>> Don Bryant
>>
>>
>>
>> -----Original Message-----
>> From: alt-photo-process-list-bounces at lists.altphotolist.org
>> [mailto:alt-photo-process-list-bounces at lists.altphotolist.org] On Behalf
>> Of
>> jusdado
>> Sent: Sunday, September 09, 2012 12:06 PM
>> To: ALTERNATIVE PHOTOGRAPHY LIST
>> Subject: [alt-photo] tricolor gum problem
>>
>> Hi all.
>> After a series of prints with tricolor gum with very good results, now
>> two things happen: 1. - To spread the emulsion gum, dichromate and
>> magenta pigment on printing, which contains blue (cyanotype) and gum
>> yellow pigment, a similar effect occurs when pour or scatter oily water
>> on a surface, rather than uniformly cover, the emulsion tends to collect
>> in some places and not to adhere to others. 2. - After exposure to UV
>> light, the revealed, the emulsion tends to disappear, leaving the
>> impression with a hideous green.
>> Data: equal paper and treatment, as cyanotype, like brushes, like UV
>> unit and time of exposure and processing, as dichromate and
>> concentration. Similarly gum prepared as above, but in this case drops
>> put carbolic acid (preservative) and Scmincke watercolor pigment PR122
>> same dilution 1:10,
>> What is happening?, Is there gum hardened by the action of carbolic acid?.
>> Thanks for answering and sorry for my english, translation by computer.
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Thanks Don and Paul for answering. I be away for a few days vacation, 
when I return I will try to cover following his advice.
Excuse my English text translated by computer.