Dear Mike,
Thank you for your prompt reply and the explanation.
> Hi, Jan! Plywood's plys are glued with the grain running
> perpendicular to
> adjacent plys, so it is usually quite stable and you can have the
> grain run
> across, up and down, or diagonally without worrying too much...
I haven't had any problem with registration being malaligned because of
the dampening of the wood, but that could be important if the blocks
were too wet over a long period of time or warping if left to dry in
hot conditions perhaps and then rewet and printed. Our weather can be
a bit like Vegas weather!! Personally I don't soak my wood or wet it
much ..I am a fairly dry printer as I find that the ink and paper are
easier to handle.
What I was mainly concerned about was whether the wood grain direction
would show if using it over wide coloured areas if the grain direction
in the different blocks was conflicting.... so it will be OK in the ply
wood, but to be careful in the solid timber. The grain in the shina
can appear in some prints, so it would be advisable to avoid having to
recarve a block if this does happen....yes?
The grain definitely shows in my oil based prints, so the grain in
multiblocks would have to go the same way!
> With solid
> blocks (not plywood), wood does not expand or contract much if at all
> along
> the direction of the grain (fiber bundles), but can expand and
> contract a
> lot across the grain, so it is best to have the grain running parallel
> to
> the longer dimension of the block (paper grain should run the same way
> with
> laid lines parallel to the long dimension of the block).
OK SO, the longer side follows the direction of the grain and the long
paper fibers also follow in the same direction..... With the machine
made papers, like Fabriano and BFK the longer side is the side that
should run parallel to the longer side of the block..... for a simple
explanation...is that right?
Thank you for the list of woods too..... we have many of these here.
Customs didn't like my bringing my woodblocks into Australia when I
returned from America and Canada, even though I reverently explained
that I had taken these same blocks with me out of the country !! I
know they are protecting our environment, but I am sure my woodblocks
were more pure than the shiploads of timber that are delivered onto our
wharfs each day from overseas.
Walnut does make beautiful timber too. When I exhaust my friend's
supply of shina ply then I will have to try others..... but while it is
available I will plod on!
A wood turning friend has given me some end grain off cuts and I am
hoping that I can get a few lessons from Lawrence Finn in Sydney on my
visit there in October to give me a few lessons! I need them sanded!!
Thanks Mike for your help and I'll do my next lot of blocks even though
they are shina in the same direction.... it is good to get into a habit
here....!!
I will leave the rest of your information attached for those who missed
your first posting.
Many thanks,
Jan
> Different species
> have different coefficients of expansion (and quarter-sawn wood has
> different coefficients than plank-sawn wood of the same species), so on
> large blocks this might cause problems, too, if you're very particular
> about registration...
>
> There's a decent non-technical comparison of some common (American)
> woods
> here:
http://www.extension.iastate.edu/Publications/PM950.pdf
>
> Which says, in part:
>
> Woods used for interior applications may come from two broad classes of
> trees: softwoods (needle-bearing trees) and hardwoods (broadleaved,
> deciduous trees). This botanical division does not necessarily relate
> to
> the characteristics of the wood; for example, some hardwoods are softer
> than some softwoods. Hardwoods are called "porous" woods; softwoods are
> labeled "nonporous" species.
>
> Relative hardness:
> Hardwoods:
> Soft: Aspen, Basswood, Butternut, Cottonwood, Willow, Yellow Poplar
> Medium: Black Ash, Black Cherry, Hack Berry, Luauans, Paper Birch, Red
> Elm, Silver Maple
> Hard: Black Walnut, Hickory, Pecan, Red Oak, Sugar Maple, White Ash,
> White
> Oak Yellow Birch
> Softwoods:
> Soft: Eastern White Pine, Sugar Pine, Incense Cedar, Western Red Cedar,
> Pondersosa Pine, Western White Pine, Redwood, White Fir, Spruces
> Hard: Douglas Fir, Eastern Red Cedar, Red Pine, Southern Pines,
> Hemlock,
> Western Larch
>
> Ease of working with hand tools:
> Hardwoods:
> Easy: Basswood, Butternut, Yellow Poplar
> Moderate: Black Walnut, Cottonwood, Paper Birch, Sycamore
> Difficult: Black Cherry, Elms, Hackberry, Hickories, Maples, Oaks,
> White
> Ash, Yellow Birch
> Softwoods:
> Easy: Incense Cedar, Ponderosa Pine, Sugar Pine, Western Red Cedar,
> White
> Pines
> Moderate: Eastern Red Cedar, Hemlocks, Lodgepole Pine, Redwood,
> Spruces,
> White Fir
> Difficult: Douglas Fir, Southern Pines, Western Larch,
>
> Relative shrinkage:
> Hardwoods:
> Moderate: Aspen, Black cherry, Black walnut, Butternut, Silver maple,
> Yellow poplar
> High: Ashes, Lauans, Basswood, Oaks, Birches, Pecan, Cottonwood, Sugar
> maple, Elms, Sycamore, Hackberry, Willows, Hickories
> Softwoods:
> Low: Cedars, Eastern white pine, Ponderosa pine, Redwood, White fir
> Moderate: Douglas fir, Lodgepole pine, Southern pines, Spruces, Western
> hemlock, Western white pine
> High: Western larch
>
> - -- Mike
>
>
> Mike Lyon
>
http://mlyon.com
>