collagraphy

aka collograph collagraph collografi paptryk

A collagraph print is created by printing a plate possessing the inked matrix of collaged, relatively flat materials, which allow the replication of a variety of lines, textures and images. This is achieved by building up layers of low-relief patterns through a mix of modeling media, found, flat objects and exposed photopolymer emulsion. Once sealed and dry, the plate surface can be inked and the image transferred to paper. The basic methods used to make a collagraph print plate may be described as additive and subtractive processes. The primary additive method, where this processes receives its namesake, involves creating a collage by gluing thin, found objects of various shapes, sizes, and textures to a base plate. Lines and textures may be created by painting a plate surface with modeling material such as acrylic gel, white glue, modeling paste, gesso, or adhering a grit with these materials. The subtractive collagraph process involves adhering a fine fabric like silk to the plate then subtracting the areas that will hold ink by painting out the “light” areas with acrylic medium.

Procedure
Create a plate from a piece of thin solid cardboard or material that will accept water-based glue (matboard, solid gray cardboard, cereal box, etc). Its size should be relative to the size of the paper to be printed on possessing equal margins. Collect a number of thin textured surfaces, e.g., fine meshed fabrics, netting, tin foil, dried-flat plant life, embossed wallpaper, sand, silicon carbide grit.

Draw a design onto the cardboard plate.

Using pva glue (Elmers) or acrylic medium, adhere the textures to the shapes of the design on the plate. The medium or glue can also be used to adhere the carbide grit.

Textural areas may be added to the plate by applying and manipulating modeling paste or wood filler on the plate. When the paste is half-dry, it may be scored with fine linear detail or textures may be pressed into its pliable surface. Allow adhered parts and paste to dry for 24 hours.

Coat the plate front and back with acrylic medium thinned with water. If a thicker version is used the brush strokes will print. A spray sealant can be used to eliminate brush strokes.

Allow drying for 24 hours or over night.

To Print Intaglio
Prepare and soak paper in water.

1. Prepare etching press for printing, pull bed all the way out, arrange blankets appropriately, and engage bed.
2. Reduce the intaglio ink with linseed oil so its consistency resembles warm honey.
3. Using a matboard ink dauber for each color spread the ink over the plate. An old rough paint brush or toothbrush may be used to push ink into the grooves and texture.
4. With tarlatan or rag formed into a tight pad skim or wipe the surface ink away.
5. Place plate on center of bed.
6. Clean your hands with hand cleaner.
7. Remove the paper from the water tray and roll between towels or blotting paper.
8. Register paper to the plate, cover with two (2) sheets of newsprint, and then print the plate.
9. After printing remove print, move plate to inking table for re-inking or the cleaning area, then clean press bed with wet wash or alcohol.
10. Allow print to air dry by placing on a blotter, covering it w/newsprint and another blotter then placing it under a board in the drying rack.
11. Clean up work area and proof off excess ink before cleaning off ink on plate for storage. Do not allow plate to soak up mineral spirits.

To Print Relief

1. Prepare paper.
2. Prepare etching press for printing, pull bed all the way out, arrange blankets appropriately, and engage bed.
3. Reduce the intaglio ink if necessary with linseed oil.
4. Roll up the plate with soft and hard brayers and rollers with intaglio ink.
5. Place plate on center of bed.
6. Place plate on center of bed.
7. Clean your hands with hand cleaner.
8. Register paper to the plate, cover with two (2) sheets of newsprint, and then print the plate.
9. After printing remove print, move plate to inking table for re-inking or the cleaning area, then clean press bed with wet wash or alcohol.
10. Allow print to air dry by placing on a blotter, covering it w/newsprint and another blotter then placing it under a board in the drying rack.
11. Clean up work area and proof off excess ink before cleaning off ink on plate for storage. Do not allow plate to soak up mineral spirits.

*For printing by hand, place paper onto the plate and burnish from the back with a barren, wooden spoon, or other burnishing tool as in printing a linocut.

TIPS

• All collaged materials must be thin, flat and dry, with no sudden changes in depth of texture or line — the plate must remain relatively flat with shallow relief.
• The plate must be dry before sealing then sealed front and back — non-absorbent.

When you make your collagraph plate it will have to be constructed so that it is very thin, even when materials are glued onto it. Really thin kinds of material are, for example, sifted sand, leaves, fabric and rags, thread, torn papers and tin foil. It is very important to limit the thickness of the textures on the collagraph plate, especially if you intend to print them as relief prints. Seeds, beans and sticks, for example, will cause printing problems, as the press will have to accommodate this thickness yet still force the paper down into the grooves of the texture to connect the ink.

A plate may be constructed entirely of collagraph paste. Even finger textures translate into fascinating impasto effects.

If your class is working with time constraints (and if you want to eliminate one messy step from the process) you can cut down on the drying time of the plates by covering them with thin tin foil instead of varnish. Simply spread contact adhesive in a thin layer over the plate as well as on the matt side of the foil. Allow to dry for a while. Place the foil on the plate with the glue sides together and wrap the foil over the edges of the plate. Then run this through the etching press so that the foil moulds itself around the texture of the plate. This process is recommended for heavily textured plates especially.

You can use fine sifted sand very effectively to simulate intaglio aquatint effects. Spread wood glue wherever you want shadow in the image. Then sprinkle the sand over this area. When the glue is dry, shake away the excess sand. It is recommended that you use the varnish sealing method on these plates, rather than the tin foil method described above.

When printing a collagraph as an intaglio print make sure that the ink is soft enough. It should be considerably runnier than for intaglio and linocut printing.

In order to print a thick plate through the press you may need to run it through a few times.

.After a few runs collagraph plates are permanently flatter, so you should tighten the press pressure at this stage.

POSSIBLE PROBLEMS

1. Avoid using substances which are intrinsically absorbent. These will hold ink which will then bleed under pressure.

2. Wiping scrim or tarlatan, as used in etching, is not really suitable for wiping collagraphs, as the heavily textured surface of the plate may prove too rugged for the soft wiping material. Absorbent cotton rags are more appropriate.

3. Make sure that all objects and surfaces on the plate are thoroughly adhered and sealed with a coat of well diluted P.V.A.

4. Give a sealing coat of spray lacquer or varnish, otherwise the paper can stick to the plate.

5. Mix white spirit with the ink to thin it. The heavy texture of the plate can mean difficulties in efficient wiping, and the most suitable ink is of a reasonably runny consistency. The ink should brush onto the plate and into the intaglio with ease.

Embossment and Negative Cast Relief Prints

Collagraph plate can also be used to produce embossed prints on dry paper from the un-inked plate, and plaster prints (inked plate) or negative plaster embossments from the un-inked plate.

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1. Ink up your collagraph plate with runny ink (or else leave the plate uninked).
2. Tape strips of cardboard around the edges of the plate so that it looks like a tray or a shallow box.
3. Mix plaster of Paris and pour it into the tray (reinforcing it by adding a piece of chicken wire or sacking when half the amount is poured). Then pour in the rest.
4. Leave to set for twenty-four hours.
5. Carefully pull the plaster away from the plate.
6. The image and relief surface will have been transferred to the plaster.

Printmaking

Procedure

Once all tools and materials are gathered, work can begin in whatever style you prefer. For example, if you wanted to create abstract shapes and textures, you might try stamping a sponge into gesso and then applying various relief textures on the plate surface. For a more patterned work, try using a paper or crocheted doily dipped in media and then transfer the image to the plate. The types of objects you can find, alter, and use are infinite and are limited only by the imagination.

By using found objects this way, images can either be transferred to a plate or the actual object itself can be glued to the plate and left to dry. These types of objects are also

abundant and include fabrics, pressed leaves and flowers, torn paper, and the like. The only criteria to adhering an object to a plate is that it must be extremely thin–typically less than 1/8th of an inch thick.

Each level of applied material should also be kept within this same height limit or undue stress may be placed upon the print paper. If necessary, you can create deeper embossments by incrementally building up layers, much like a staircase. Once the objects or other relief impressions dry and become part of the plate surface, they can be coated with a layer of acrylic gesso or medium to seal and protect the surface.

What remains is a low-relief image that can be inked and transferred to paper. Keep in mind that all plate images will print an inverse (or mirror) image, so this should be accounted for in the design phase. Another bonus is that a plate may be multiply printed in different colors and orientations to create a series of works after it has been cleaned and new ink (or paint) applied.

For more structured works, such as an interior or a landscape, print material or media can be carefully applied to a plate to represent specific shapes and compositions. To create an

illusion of depth, thicker layers can be built up and exact details can be applied by either painting medium on the areas required or by carving away low-lying areas.

Variations include carving into metal plates with power tools or using molten (or a fast-drying chemical) solder to build up relief textures or details. Another is adhering crumpled aluminum foil to the plate surface to create texture. If you try this, be certain to fill the backside of the foil so that it will not collapse under the pressure of the press.

It often takes several proof trials to get the desired effect from a print plate, so prepare for experimentation. For relief works, the plate can be inked and the image transferred to

paper by using a roller. For plates with incised lines and recessed textures, try applying ink, wiping the surface, and then transferring the remaining pigment just like an intaglio

print. You can either uniformly wipe pigment across a plate or paint specific areas as the image requires. As mentioned, be prepared to experiment with different techniques.

Collografi eller Paptryk.

Tryk kan også gøres udfra pap i stedet for zink- eller kobberplader. Pappet skal være kraftigt og glat på overfladen, ellers vil det suge for meget væde. Arbejdsgangen minder meget om koldnål, da man præger pappet med redskaber, som man ridser med. Man kan også flå det glatte lag af og udnytte strukturen i pappet. Udtrykket kan svinge mellem at ligne en koldnål til en ætset streg eller flade. Pappet kan dog ikke holde til så mange trykgange, og man kan heller ikke rette op på fejl med et skrabestål som i zink eller kobber. Til gengæld slipper man for misfarvning, syrebade, og processen er hurtigere.

Arbejdsgang:

• 1. Rids dit motiv i pappet, man kan også bruge trælim til at lave struktur med, det skal dog gøres i første omgang, mens pladen ikke har været trykt.
• 2. Pensl med schellak. Det forsegler pappet og forhindrer det i at optage olie fra trykfarven, som får det til at svulme op. OBS! Lakken skal være helt tør, før der trykkes.
• 3. Påfør trykfarven og tør af med tarlatan, til motivet kommer til syne.
• 4. Tør af med madpapir, motivet står helt rent.
• 5. Tag papir op af vandkar eller ud af plastic og gør det klar til tryk.
• 6. Pappladen trykkes på samme måde som zink- elller kobberpladen.
• 7. Hvis papiret sidder fast efter trykning, kan man med en hårtørrer langsomt løfte det af.
• 8. Rens af med petroleum eller terpentin når der ikke skal trykkes mere. Brug aldrig sprit, da det opløser schellakken. Hvis der sidder papirrester i pladen, kan disse fjernes med en klud eller aftørringspapir fugtet med vand, inden der bruges opløsningsmidler.
• 9. Hvis man vil lave flerfarvetryk, kan det sagtens lade sig gøre.
• 10. Skær en papplade ud, så den passer til den første plade, læg den nye plade på trykket og kør igennem pressen. Motivet er overført, og den nye plade behandles på samme måde som den forrige. Husk også at pensle efter med schellak og lad den tørre helt inden tryk. Hvis flere plader ønskes, gentages processen med et frisk tryk.