Ironing. I've pulled my hair out over this one, too. Toner for most dry
toner technology devices (laser printers, Xerox process copiers) is
manufactured from tiny carbon particles encased in thermoplastic. The
powder is temporarily adhered to the paper electrostatically and then fused
by passing the paper over a hot plate or roller. The fusing temperature of
the thermoplastic used in dry toner process varies from manufacturer to
manufacturer, but generally is between 150 and 200 degrees C (300 to 400
degrees F) which is quite a bit hotter than typical clothes irons gets (for
safety and liability reasons). So MOST dry toner prints can NOT be
satisfactorily transferred using a hot iron. I finally bought an expensive
industrial iron (supposed to reach 400 F) for heat transfer of toner and
even IT didn't work worth a darn on my HP LaserJet prints, giving only very
faint transfer. Perhaps this is because the bottom of the iron is not
particularly flat -- I've considered welding little beads onto the bottom
and then grinding them flat so that its surface is more baren-like, but I
haven't done that, so can't report. In any case, this iron is hot enough to
brown the paper but the toner still won't transfer well enough for my
purposes. I tried it with some fresh Kinko's copies with the same lousy
results.
I used to transfer toner using lacquer thinner and a press but no longer do
it that way (works well, but is really very toxic).
However the following low-tech techniques work VERY well and produce
extremely accurate registration:
This one is exceptionally fast and easy - many of my workshop students have
used this method in multiblock printing without any problem at all:
1. Prepare your laser print with the areas to be carved away printed
solid black and include the outline of registration marks on the sheet
(kento) if you use registration. This image must be reversed (flip
horizontal for instance) if you want the print to be right reading.
2. Prepare the surface of your block the usual way (plane and/or sand
flat and smooth)
3. Brush a thin rice-paste (consistency of cream to heavy cream) thinly
over the surface, squeezing off any excess with the heel of your palm and
then patting the entire surface quickly to assist in producing a thin and
even film of paste over the block surface. This entire process takes about
20 seconds.
4. Position the sheet over the block with the toner facing out. Wipe
the sheet flat using very light pressure with the heel of your palm to
prevent bubbles - as the paper absorbs water from the paste be careful not
to stretch it (but it tends NOT to stretch or buckle anyway)
5. Wait about 30 minutes for the paste to dry completely.
6. Carve away the black areas.
7. Dampen the surface of the block for about 10 minutes. Peel away the
paper - brush the block under running water to remove remaining specks and
paste.
This one is also exceptionally fast and easy - it's almost identical to the
traditional method and works well for multi-block printing where the printer
prefers to carve something akin to a key block freely and without any
particular planning in advance.
1. Carve a block however you like, but include kento carving for
subsequent registration.
2. Ink the entire block, including kento with SUMI but the block must
not be too damp and the sumi brushed out very evenly and thinly - keep it on
the 'dry' side
3. Using very thin, dry paper (cheap mulberry paper or unsized hosho
will work, but thinner, more transparent papers work better), place the dry
paper so that it covers the entire block
4. Print with baren (use a backing sheet if necessary) and set the
paper aside to dry - the block should have been dry enough so that the paper
doesn't become very damp anyway - you'd like to avoid buckling if you can.
5. Repeat printing a few more sheets than you imagine you'll require
6. For each block, repeat the following:
1. Prepare the surface of your block the usual way (plane and/or sand
flat and smooth)
2. Brush a thin rice-paste (consistency of cream to heavy cream)
thinly over the surface, squeezing off any excess with the heel of your palm
and then patting the entire surface quickly to assist in producing a thin
and even film of paste over the block surface. This entire process takes
about 20 seconds.
3. Position the printed sheet over the block with the printed side
against the block. Pat the sheet down flat using light pressure - as the
paper absorbs water from the paste be careful not to stretch or tear it.
Work very quickly to remove any bubbles and don't over work!
4. Wait about 30 minutes for the paste to dry completely.
5. Carve as desired using the printed lines as your guide and carving
the kento exactly. If the paper is too opaque to see the printed lines, you
may oil it to make it transparent or dampen it and rub away the fibers until
the line is clear.
6. Dampen the surface of the block for a few minutes. Peel away the
paper - brush the block under running water to remove remaining specks and
paste.
Good luck!
-- Mike
Mike Lyon
Kansas City, MO
http://mlyon.com