Test Summary: The purpose of this series of tests was to see if we could modify an existing transparent base (Hanco Tint Base Extender) in order to achieve a base similar to Faust Q699.
Date: April 24, 2014
Researchers’ Names: Mike Barrett and Angela Zammarelli
Room Temperature: 68 degrees
Materials: Hanco Tint Base Extender and MgCO3
Hanco Tint Base Extender is very close to burnt plate oil #000. It is sticky and long with a loose viscosity.
Step 1: Finding a mixture of Hanco t. base and MgCO3 that is close to Faust Q699 Mix 1: 1tsp. Hanco t. base & 1/2 tsp. MgCO3. This mixture thickend more than the previous plate oil mixes with just a 1/2 tsp. of MgCO3. It was still too loose for our criteria. Also the MgCO3 particles were visibly suspended in the oil. Mix 2: 1 tsp. Hanco t. base & 1 tsp. MgCO3 This mixture got pasty quickly. It had a heavy viscosity and was still very long. Not achieving the creamy feeling of Faust Q699
Mix 3: 1 tsp. Hanco t. base & 1 1/2 tsp. MgCO3 Not as buttery as Faust Q699, but had a good body. It was tacky and sticky. This mixture was shorter than the first two mixes in this test. More MgCO3 was visibly suspended in oil. We were interested to see how this would affect the ink when printing.
Mix 4: 1 tsp. Hanco t. base & 2 tsp. MgCO3 This mixture had a very pasty consistency and was tough to mix. It had a high viscosity with a medium length with long tail that breaks half way between knife and table.
Conclusions: Hanco t. base was very sticky and needed modification if one was looking for a Faust-like base. We believe that Hanco transparent base mixed with MgCO3 was not an adequate substitution for what we are looking for. We were however going to try our mix #3, which will be referred to as Hanco-Zmix, for print tests. In the print tests we were looking for how the Hanco-Zmix works into the plate, wipes away, and for trueness to the ink color.
Print Test Plate Material: Copper
Ink: Graphic Chemical & Ink Co. Process Blue
Press Setting: 5.5
Paper: Hanemeuhle Copper Plate
Draw Down Tests: We did 4 draw downs with the 4 mixtures that we were going to test print. The first was straight Hanco-Zmix which pulled across the paper smoothly and remained transparent. The second pull was Hanco-Zmix with a dab of ink which resulted in a transparent blue that was clear of interruption by the base. This mix also pulled across the paper smoothly and remained transparent. The third pull was 95% Hanco-Zmix to 5% ink. Again, this mix produced a blue true in hue to that from the can with nice transparency and pulled smoothly across the paper. The final draw down was a 1:1 mix of Hanco-Zmix and ink. The color was true in hue to the ink out of the can, and it pulled across the paper smoothly.
Evaluations of Prints:
Print 1: Hanco-Zmix with no ink on a heated plate. Application and Wiping: sticky, but moved around the plate easily. It went into the aquatint well. Some discoloration was apparent on the card used to apply ink to plate. No oxidation present on tarleton. Print: The images had a slight yellow hue from the color of the t. base.
Print 2: Hanco-Zmix with a dab of ink on heated plate Application and Wiping: This mix was sticky, but applied easily. Could feel the ink working into aquatint. Wiping was inconsistent, so this mix was printed twice. Print: This first plate was under wiped on the clear areas of the plate and over wiped in the center. The second print was wiped much better. The transparent base seemed to keep true to the blue hue present in the can.
Print 3: 95% Hanco-Zmix to 5% ink on a heated plate Application and Wiping: Felt sticky. This seemed to be the major problem with the Hanco base. Soaked into aquatint well. Print: We were pleased with the resulting transparency
Print 4: 1:1 mix of Hanco-Zmix and ink on a heated plate Application and Wiping: Tackiest of the three mixes, due to high percentage of the ink present. Spread onto the plate well. Required a lot of wiping. Held in the aquatint areas really well. Hard to get off of the plate edges and the clear areas of the plate. This mix was printed twice, again due to inconsistencies with wiping. Print: This mix showed issues with wiping and held plate noise more than previous mixes. Areas of softer aquatint were wiped out as we tried to clear ink from other areas of the plate.
Conclusions: Hanco Transparent Base is a stickier base which seems to make accurate wiping hard. It works well into aquatint and prints those forms well. It is transparent and does not affect the ink color.