ReliefPrinting

Modules

84 ReliefRelief printing is a family of printing methods where a printing block, plate, or matrix- which has had ink applied to its non-recessed surface- is brought into contact with the paper. The non-recessed surface will leave ink on the paper, whereas the recessed areas will not. A printing press may not be needed, as the back of the paper can be rubbed or pressed by hand with a simple tool such as a brayer or roller. In contrast, in intaglio printing, the recessed areas are printed.

From this photo of the building of our Node in Bilbao.

I moved it into Photoshop and used the Invert command to pass it into the LASER CUT program. IMAGE > ADJUSTMENTS > INVERT

Then in the RDWorksV8 program use:

HANDLE(W) > BITMAP HANDLE When you are in that window, select the size, material and imported back to the laser

I have used a 4mm thick MDF wood board

For the engraving: Speed(mm/s): 400.00 MnPower(%)-1: 35.00 MaxPower(%)-1: 35.00 For the cut: Speed(mm/s): 25.00 MnPower(%)-1: 70.00 MaxPower(%)-1: 75.00

Once we have the piece of engraved wood, it is ready to remove all the dust and that it does not have anything external that could affect the surface. you can use a mop with alcohol.

You will need a rubber roller, Novavit® BCS BIO INTENSIVE is a modern series of highly pigmented basic colors for sheetfed offset. It is based on renewable raw materials and is semi-fresh., printing sponges.

We have discovered that the fourth day is the best time to print, but when it is not possible to do so at that time, it can be moistened and gently sponged with water.

With the roller perfectly impregnated with ink, you pass it over the way of engraving first horizontally and then in the other direction. To check that the entire surface is well impregnated, it is good to use a beam of light, we have used the mobile flashlight but you can use any lamp.

After we have the engraving ready we put it in position on the etching press.

We have placed the biomaterial on top of the plate with registration marks that allow us to position the matrix and center the bioplastic that will fall on it.

To protect the biomaterial and the felt we have also placed a 200 microns thick acetate.

Then, before passing it through the press, we put a protective felt on all the layers. Helps distribute pressure.

Before passing it through the press, it is important to check the pressure of the press as it can damage the biomaterial and the engraved wood. But after that check, everything is ready to go through the press and you get the impression.

To give a new use to the mold where I made the silicone figures, I thought that I could add texture to the bioplastic, also as both repel the ink a little, they could give me different shapes and give richness to the print.

You will need a rubber roller, Novavit® BCS BIO INTENSIVE is a modern series of highly pigmented basic colors for sheetfed offset. We add a transparent base to camouflage with the bioplastic.

To add the ink to the glass slab or smooth stone, pick up a small amount with a brayer and begin to roll out.

Continue to add ink and roll out in small quantities. when the ink is rolled out, the surface is smooth and velvety, and the ink makes a “tacky” sound, it is ready to transfer.

Use the brayer to transfer the ink to the matrix, rolling in different directions but being regular and neat.

this is the same process as the previous one, what changes are the matrix, so it is to place the matrix in its place, then use the registration marks to place the image well positioned, and then put a 200-micron acetate to protect the felt.

One very important thing that we have to take into account in order not to damage the matrix or the bioplastic is to have the pressure of the press correctly measured.