press n peel test 36

Researcher:  Cathe Janke

Test Summary
This test is to determine if higher quality laser printer will create a film that would give better results.

Image Preparation

1. Change image to TIFF
2. Image > size> 5.667, 4.25,  300 dpi
3. Layer> New Adjust Layer> Channel Mixer > monochrome +54 RED   +45 GREEN   0 BLUE
4. Layer> New Adjust Layer> Levels (Adjust the sliders. White slider on the left at 7 and Black at 249 on the right) Finish with adjustments of mid-range using the middle slider.
5. Layer> New Adjust Layer> Invert
6.  Click on original layer in the history, and Filter> Filter gallery > preset aquatint screen,  dpi
7. Saved image on zip drive to take to Collective Copies, Florence, MA
8.  At Colllective Copies had the image printed on Press n Peel film on a DOCUCOLOR 242  Printer with the bypass tray set at “Transparency”.

Plate Material: .032 Copper 
Plate Size: 4″ x 6.5” 
Room Temperature: 68 degrees Farenheit, dry

Plate Preparation
The plates were beveled, polished with 00 grade steel wool, and degreased with soy sauce and bon ami.

The copper plate was placed on a phone book and the film was placed on its surface print-side-down. The film was carefully heated to the plate with a tacking iron for 8 minutes at 300 degrees F.

Testers found that backing the plate with contact paper was most pragmatic AFTER the plate had been ironed and cooled and with the film still adhered to the plate.
test16.2.18.14film.after.iron
test16.2.18.14copperbeforeetch

Etching Notes: 
The plate was etched in a 42 degrees Baume Ferric Chloride bath in a vertical tank.

Time in Bath:  20 minutes

Removal of Grounds:
 Plates were saturated with SoySolvII and left to soak for 5 minutes. Ground was then wiped off easily with a rag.

After Bath Evaluation: looks good.

Inking Methods
: Plate was inked with Graphic Chemical Etching Ink in Bone Black, applied with a piece of mat board. It was gently wiped in an outwards motion with a piece of tarlatan. Then paper wiped,  then hand-wiped.

test16.2.18.14.plate
Paper Type:
Hahnemuhle, warm white
Paper Soaking Time: 20 minutes
Press Blanket Setup: Takach pressure at 5.5,  2 blankets, sheet of newsprint

test16.2.18.14.proof
Test Conclusion
Looks good! Good step forward, lots of detail but the darkest darks did not transfer well,  It is the tester’s conclusion that setting the Black at 249 is still too high and that the dark needs to open up more to allow for more copper to be etched.  The next test will lower the blacks even more.

press n peel test 37 >