Re: Determining SPT with gum Was: Gums a la Demachy and Puyo

From: davidhatton_at_totalise.co.uk
Date: Fri, 14 Jul 2006 14:35:38 +0100
Message-id: <E1G1NpS-000CbH-K0@webm8.global.net.uk>

('binary' encoding is not supported, stored as-is) Hi,

I would add to that comment by saying that with a correctly curved negative for
your personal pigment, paper, sizing, exposure and development, more than one
coat is unneccesary. I know Terry doesn't like 'curves' though..

Regards

David H

On Fri, 14 Jul 2006 13:17 , David & Jan Harris <david.j.harris2@ntlworld.com> sent:

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>Don, Terry, etc
>
>It might be worth clarifying that the concept of a
>standard printing time (SPT) when using digital negatives is relevant to most
>processes and even to tri-colour gum and single coat gum, but the relevance to
>multiple coat, single colour gum (is there a better one word term for this?) is
>somewhat less. For this, it is relevant to the first layer only (after which,
>presumably shorter printing times will be used).
>
>Both Katherine and Chris practise tri-colour gum, I
>believe.
>
>David
>
>----- Original Message -----
>
> From:
> TERRYAKING@aol.com
> To: alt-photo-process-l@usask.ca
>
> Sent: Friday, July 14, 2006 7:00 AM
> Subject: Re: Determining SPT with gum
> Was: Gums a la Demachy and Puyo
>
>In a message dated 13/07/2006 21:52:13 GMT Daylight
> Time, dstevenbryant@mindspring.com
> writes:
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> Terry,
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>What Chris and Loris are
> discussing is the calibration steps of printing gum using digital negatives.
> Once the minimum exposure time is determined it needs to remain constant
> through out the calibration process and is used when making negatives for
> prints. The image is altered via Photo Shop not by changing the exposure
> times when printing an image.
>
>
>
>Don Bryant
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>Don
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>Why
> ?
>
>Terry

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Received on 07/14/06-07:36:07 AM Z