From: Lisa Reddig (lisa@julianrichards.com)
Date: 04/14/03-11:22:46 AM Z
Chris,
Are your ratios with powder or tube pigments?
I am using powder. My starting point is .5g pigment in 10 ml gum and 10 ml
pot di, I go up or down on the pigment according to how dark or light I
want.
Lisa
> Lisa,
> Mix less pigment but keep your gum arabic ratio to dichromate still
> high. In other words, as long as the gum keeps the solution viscous enough
> you shouldn't have any problem. I was working with Quinacridone pink
> yesterday at 3.5g pigment/12ml gum, then 1.75/12, and then .75g/12 and this
> all 1:1 with am di upon exposure, and the higher strength one is so
> overpoweringly magenta (good for CMYK) but the least is baby butt pink and
> very pretty. That was one thing I found good. The actual thing I was
> testing was different acrylic sizings with this pigment which tends to be
> stainy, and that was a bust--either the sizing was too much and I could
> brush the gum right off, or it was too little and the gum stained in grain
> in the bumps of the paper, or the 2 coats of 1:10 was so uneven that I got
> spotty leprous naked bodies. (I tested 50/50 matte medium, 1/10 matte
> medium 1 coat, and 1/10 matte medium 2 coats) Back to the drawing board.
> Chris
> ----- Original Message -----
> From: "Lisa Reddig" <lisa@julianrichards.com>
> To: "Alternative" <alt-photo-process-l@sask.usask.ca>
> Sent: Monday, April 14, 2003 7:54 AM
> Subject: Mixing a light pigment for gum
>
>
>> Hello,
>>
>> I am trying to figure out how to make a really pale/light layer of color
> on
>> a gum. As everyone has been saying, using too little pigment to gum ratio
>> causes stain, which I have experienced. Is there some white or clear (?)
>> pigment that can be mixed with a color to make it paler, and yet still
> print
>> properly.
>>
>> I have added a color called "Whiting", it doesn't make it lighter, it
> makes
>> it more opaque, which actually makes it darker because less light comes
>> through from underneath it, and so therefore it looks darker.
>>
>> I can't expose less, because that causes it to wash out of less exposed
>> areas. I want an overall coverage, only really light.
>>
>>
>> Thanks
>> Lisa
>>
>>
>
>
>
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