Re: Why multiple exposure (was Re: (Gum) Tonal scale)

On Dec 1, 2005, at 11:46 AM, Loris Medici wrote:

> Hi Katherine. I was talking about one color / one layer of the
> tricolor. The
> test I did was one coat, one color. I mention tricolor just because I'm
> making tests in order to make tricolors in the future.
>

Yes, this is all exactly as I understood. Do you disagree with my
comment that getting 11 steps on one layer of a tricolor isn't terribly
surprising to me, but it would be more remarkable if someone using a
very heavy mix of lamp black, say, to print a one-coat gum, got 11
steps?

> BTW, what did you find convoluted about the test?

What? I didn't find anything convoluted about your test, at all, in
fact I didn't make any comment whatever about your test. I even
snipped the part about the test off your quoted post, since it wasn't
relevant to any of my comments. Your test is just fine, as far as I
know, although I can't say that I spent a lot of time studying it.

  No, my comment was purely about your pigment. When I said "this seems
a convoluted way to print thalo" I was simply dissing Schminke for
adding white to pthalo and calling it "cerulean blue tone". It was a
flip comment and I'm sorry it was misunderstood. Like I said,
whatever works for you is great, and it sounds like this works very
well for you. Sorry about the confusion,
Katharine

I just gave all the
> details to be clear and maybe the abundence of detail made you think
> I'm
> doing something very complex. It's not - actually that was the result
> of my
> very first test. If your comment is about the way I'm preparing the
> emulsion
> mix: I have to mix a standard emulsion (same amnt. Of pigment / gum and
> dichromate) in order to calibrate with the PDN system. Everything has
> to be
> as constant as possible. I just added gum to the tube pigment until the
> saturation and density seemed right to me (not too dark and opaque,
> not too
> light). I find Schmincke Cerulean blue tone pretty dark (hence my
> comment
> "acceptable density with one gum coat, sligthly lighter than single
> coated
> classic cyanotype").
>
> Regards,
> Loris.
>
> -----Original Message-----
> From: Katharine Thayer [mailto:kthayer@pacifier.com]
> Sent: 01 Aralık 2005 Perşembe 17:36
> To: alt-photo-process-l@sask.usask.ca
> Subject: Re: Why multiple exposure (was Re: (Gum) Tonal scale)
>
>
> On Dec 1, 2005, at 12:34 AM, Loris Medici wrote:
>
>>
>> Hi Judy, I was making tests for tricolor gum. I'm trying to find the
>> right amnt. of pigment, gum and dichromate + strength of dichromate:
>>
>> The pigment (tube) is Schmincke Cerulean blue tone (PW 4 + PB15:3)
>
> This seems to me a rather convoluted way to print with pthalo, but
> whatever
> works for you....
>
> I didn't see Judy's original post quoted below. I would agree with her
> that
> it would be remarkable to see a one-coat made with very dark heavy
> pigment
> that printed 8 steps, But I would disagree with her statement that
> experienced printers can't expect more than 6 or 7 steps even with a
> lighter
> pigment/mix; I routinely print 8 to 10 steps when I'm printing the
> midtones-highlights layer of a (monochrome) image, or one of the
> layers of a
> tricolor. But Judy and Loris, I think, are talking apples and oranges.
> Judy's talking about a one-coat gum that is printed with a very
> dark-valued
> pigment; Loris is talking about tricolor, where the darkest values are
> created by overlaying three layers, none of which are as dark as the
> darkest
> tones in the combined image.
>
> Katharine
>
Received on Thu Dec 1 18:48:23 2005