Verdigris

Name: Wenrui Zhao, Olivia Clemens, Teresa Soley, Lila Goldenberg
Date and Time: 2016.2.8 10:00am
Location: Lab
Subject: Verdigris

Our group used 5% and 10% acetic acid solution.
5% acetic acid solution -- this was verdigris already existing in lab, resulted from longer cultivation with more copper. The texture of this verdigris is more softer, sticky and paste like. (as can be seen from the first image below)
10% acetic acid solution -- removed from copper plates suspended over acetic acid solution for 2 weeks. The texture of scrapped verdigris is more power like. (see the second image below).






Equipment:
scraping knives, paper towels, stand oil, cold-pressed oil, turpentine, brushes, glass plate

Procedures:
We tried to mix 5% and 10% verdigris respectively with stand oil and cold pressed oil, and see how the color would appear different.
5% acetic acid verdigris from lab:
We added stand oil.
Because of the texture of this verdigris, we needed to use extra efforts to mix and mull it to eliminate the particls.
Then we painted it onto the panel.

10% acetic acid verdigris from mason jars stored at home:
Scraped verdigris from copper plates into plastic containers with dull knives
Divided 10% verdigris into two even piles
Mixed ½ of verdigris with stand oil and ½ with cold pressed oil
Painted each grouping onto gesso panels






Cleaning:
Cleaned glass plate with oil & paper towel first, then acetone
Cleaned brushes twice with oil, then with turpentine, then soap and water
Discarded paper towels, gloves, and plastic containers used for verdigris into hazardous waste bin
Discarded plastic containers used for oil