Re: yupo and gum

Here are the scans I promised, of gum on yupo using the Thayer-
Klinker dry-brush method :--).

Coating with a dry brush isn't as easy as coating the usual way; it's
difficult to get the emulsion smooth, and in the 5 or 6 prints I've
done, I've not yet mastered this. The reasons to persevere and
perfect the coating would be the speed of drying and the interesting
surface of the print; it's like no other kind of gum print I've ever
seen, and I've printed gum a lot of different ways on a lot of
different surfaces. The surface looks like a photograph on RC paper;
I said glossy the other day but it's not really glossy, it's more a
soft luster, a semi-gloss kind of sheen, but of course it has the
quality of a gum print as well, so you have the best of both worlds.
You also get very lovely tonal transitions and sharp detail, as the
surface is perfectly smooth.

Some other disadvantages: It's hard to get a real deep tone with
this, as you're applying the coating so thinly that there aren't as
many pigment molecules per square inch. The other thing I learned,
trying a second coat this morning, is that multiple coatings are
problematic, because it's almost impossible to see the thin coating
over the image and be sure it's thin enough. I got it too thick, and
it didn't stick in development.

http://www.pacifier.com/~kthayer/html/Yupo2.html

Katharine

On Mar 10, 2006, at 3:24 PM, Katharine Thayer wrote:

> Well, I just discovered something, and it was Dennis's hint that
> led me to it in an indirect way, which just goes to show.
>
> Anyway, what I just discovered is that the key to printing gum on
> untreated yupo; that is printing a normal looking photograph
> without the emulsion running or flaking, is to brush on a very thin
> dry coat. The surface of the yupo grabs onto the dry-brushed layer
> and keeps it in place, even in the water, whereas a layer brushed
> on thicker or wetter runs off or moves around on the plastic surface.
>
> The trick is laying down an even coat; I'm still getting the hang
> of that. You can move it around a little bit, but not very much.
> It's really the same thing as the normal way of coating with a
> brush, but you have to do it with even a quicker and lighter touch,
> because the dry coating sets immediately as it's brushed on.
>
> What I do, which might or might not be the best way to do it; maybe
> someone else has a better idea -- I dip the brush lightly into the
> coating mix and then touch it to a paper towel, which draws off
> much of the moist coating and leaves a fairly dry brush. Then I
> proceed as usual, except, as I say, quicker and lighter even than
> usual.
>
> I've done five prints like this without a hint of flaking or
> running of the image. I've got to go do something now, but will
> scan a couple of them later when I have time. I don't know how well
> this works for multiple coats, but I'll find out. Like I say, the
> appeal of this for me is the fast drying, and the interesting print
> surface. Later,
> Katharine
>
>
> On Mar 9, 2006, at 12:48 PM, Katharine Thayer wrote:
>
>
>>
>> On Mar 9, 2006, at 12:30 PM, dklinker wrote:
>>
>>
>>
>>> Hi Katherine the only thing i know about Yupo is that it is the
>>> substate
>>> that Pete and the Temperaprinters use because of it's dimentional
>>> stability
>>> and the fact that the Temperaprint emulsion sits on the
>>> surface,but i
>>> understand watercolour artists are now using Yupo as a
>>> support,have trawl on
>>> the web there is quite a lot of info.Dennis Klinker
>>>
>>>
>>
>> Yes... I read an article in a recent watercolor magazine about
>> using yupo for watercolor, for example, , and a friend of mine who
>> is a very accomplished watercolor artist, uses it, or something
>> similar, a lot. You get really interesting results by letting the
>> color run on the plastic with more or less water in it, or by
>> brushing it with paint on a dry brush. But I don't quite see how
>> this information would be relevant to gum printing on yupo in
>> general, or to the information I provided about my experiences
>> with printing gum on yupo in particular?
>> kt
>>
>>
>>
>
>
Received on Sat Mar 11 11:17:50 2006