Re: 3rd layer of gum
Katharine...
Thanks for your reply.
This happens whether the paper is sized or not.
Yesterday I did a tricolor on Fabriano EW unsized in blue, red, yellow order (my
usual order is yellow, red, blue) and the yellow (3rd) layer had just a
little effect on the outcome and was developed in 15 min as opposed to the
other layers at 30 min.
When I print Y, R, B the same thing happens on the
last layer (B).
It always looks like the last layer needs another
exposure of that particular color.
Paul
----- Original Message -----
From: "Katharine Thayer" <kthayer@pacifier.com>
Sent: Wednesday, October 07, 2009 9:30
AM
Subject: Re: 3rd layer of gum > yupo, and only in areas where there are actually three layers of > hardened gum. (for instance if there's an area that's all blue, where > little or no yellow or red pigment have been deposited, there's no > problem with adherence of the third (blue) layer, only in more > neutral and mixed areas where there are equal amounts of all gum > layers. I've never seen it with paper. > > As Keith said, you can adjust for it either by exposing more or > developing less. I also wonder about your sizing; it sounds like > maybe your sizing isn't leaving enough tooth for all the layers of > the gum to have some to hold onto. > > FWIW, > k > > > On Oct 6, 2009, at 1:18 PM, Paul Viapiano wrote: > >> Hi all... >> >> Why does the 3rd layer of a gum print always develop so quickly, or >> is subject to washing off so much more quickly than the other >> layers, whether with sized paper or not...? (regardless of printing >> order, as well...and these are all the same exposure time, too) >> >> This has happened on several tricolors I've done now... >> >> Thanks! >> >> Paul >> >
|