Re: Cyanotype

Susan,

Step tablets are quite colorless and could tell you whether a non-pyro
negative would print fast enough on your emulsion. Plus it would tell
you what kind of negatives, what density ranges, would print best. Etc.

 From my experience, even a little stain makes pyro negatives almost
unprintable with cyanotype. So make sure that's not the reason first.
Can you try printing a non-pyro negative?

Good luck.
Sam

On Feb 18, 2006, at 9:40 AM, Susan Huber wrote:

> Hi Sam,
> Thank you for your response- I don't have a step tablet and don't know
> where
> to get one here.
> If a negative doesn't print out weell, what would a step tablet tell
> me?
> That the steps are not exposed enough?
> The stain in my pyro are not much... most of them look brownish and;
> lately
> I have been using Pyro-Cat which is better in that I can use more
> processes
> with the developer.
> I have never been able to get a real emerald stain from the Pyro- (I
> use the
> formulary formula) and have hard water with a filter.
> Hope to hear from you soon,
> Susan
> ----- Original Message -----
> From: "sam wang" <stwang@clemson.edu>
> To: <alt-photo-process-l@sask.usask.ca>
> Sent: Friday, February 17, 2006 6:17 PM
> Subject: Re: Cyanotype
>
>
>>
>> On Feb 17, 2006, at 7:56 PM, Susan Huber wrote:
>>
>>> Hi David,
>>> I recently mixed a batch of cyanotype of the green type ( I used the
>>> brown
>>> type 20 years ago and last year used the 'new'Ware solution which was
>>> difficult to mix. The green brushes on greener than the brown and the
>>> War'es
>>> soluttions did... I mixed the classic ala C. Jamesas per his book
>>> which has
>>> a lot more Fe.Ammonic and Ferricyanide solution than the 'old' one of
>>> the W.
>>> Crawford's formula. The prints were very bleached even after 30
>>> minutes
>>> under the UV printer. I used the sun last year and did better with
>>> the
>>> Ware
>>> solution. 20 years ago I was on city water- I am on my hard water
>>> (well
>>> water) and wonder why nothing looks good?
>>> I can't afford to waste materials as I have to get them form the
>>> States. (I
>>> live in Canada).
>>> Do you have an idea what is wrong- I do dev. the negatives in Pyro-
>>> and 20
>>> years ago- I didn't...
>>> Thanks, Susan
>>> www.susanhuber.com
>>
>> Susan,
>>
>> Stain from pyro make the negatives "bullet-proof". Your problem may
>> not
>> be chemistry or the water.
>>
>> I would suggest using a step-tablet instead of a negative and see what
>> the result looks like.
>>
>> Sam
>>
>
>
Received on Sat Feb 18 14:47:21 2006