From: Judy Seigel (jseigel@panix.com)
Date: 02/09/01-03:51:05 PM Z
On Fri, 9 Feb 2001, Sarah Van Keuren wrote:
> The results of my first shrinkage test are in. They are so unexpected that I
> think I should do the test over again and maybe a third time if the first
> two don't agree. Basically, HOT AND SHORT preshrink produced no shrinkage
> along what I think is the grain (from within deckle to within deckle on BFK
> Rives 250lb ‹ the 22" side) but a whopping 1.8% along the 30" side. COOL &
> PROLONGED preshrink for 30 hours produced 1.64% shrinkage along the grain,
> and 1.2% along the 30". I actually used 1/4 sheets torn from the original
> 22x30 piece because of tray and space considerations. I measured 275mm by
> 380mm on the untouched paper, drawing pencil lines with stops and measuring
> throughout with a fairly finely printed plastic ruler that I use for
> measuring the windows of mats.
Sarah, thanks -- I confess I made that statement a bit uneasily: It seemed
so bizarre -- what if I'd screwed up. Now at least it seems plausible.
You don't say which paper you tested. Different papers seem to have
different shrink patterns, though second tests at other times gave
different patterns for the same paper, so who knows, maybe it's just how
paper lays in the tray !! Is it any wonder register is a problem?
For what it's worth, I note that I felt my measuring wasn't accurate
enough (generally shrink range from 1/16th to 1/8th inch) to work less
than half sheet (15 inch by 22), though maybe that was simply lack of
method on my part.
In any event, I found fastening to a rigid substrate the safest, but
that's such a HASSLE when you get to large...
Judy
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