The response to my conductive paint experiment on sites like Hack A Day and Instructables.com has been phenomenal so I have kept experimenting with different parameters. Today may be the last day but then again someone may suggest something else that makes me want to pick up and try some more. I won't force it either way.
Someone on Instructables suggested mixing graphite powder with paint medium which eliminates paint pigments which may interfere with the resistivity. As it would happen, my roommate, who gave me the idea to start this experiment, had some gel medium which she donated to the experiment.
Black acrylic paint was purchased but the pigment is unknown. Ideally the pigment would be carbon. A swatch was painted on Friday and allowed to dry. No measurable resistance could be measured on the pure paint. The goal is to test two more substances with graphite powder in the same manner as the first three experiments.
Materials for this experiment
Graphite powder was added to two jars. Black paint was mixed into the first jar at a ratio of approximately 1:1 by volume. The mixture was stirred with a toothpick. Once mixed a single heavy line was drawn before the toothpick was wiped off in the jar and allowed to dry next to the sample.
Amount of graphite in each jar
Line and toothpick covered in paint and graphite powder
Gel medium was added to the second jar at a ratio of approximately 1:1 by volume. The mixture was stirred with a toothpick. Once mixed a single heavy line was drawn before the toothpick was wiped off in the jar and allowed to dry next to the sample. The gel medium and graphite powder required more laborious mixing than the black paint and graphite powder.
Open jar of gel medium
Adding gel medium to graphite powder
Mixing gel medium and graphite powder
Lines and toothpicks drying
The samples were allowed to dry for five hours. No resistive reading could be taken from the gel and graphite powder after hours of drying. The black paint and graphite powder had acceptable readings.
Pure black paint
Gel medium and graphite powder
Black paint and graphite powder
Testing gel medium and graphite line
Testing gel medium and graphite toothpick
Testing black paint and graphite line
Testing black paint and graphite toothpick
The rest of the posts for this project have been arranged by date.
A list showing of all the final posts of COMPLETED projects.
Disclaimer for http://24hourengineer.blogspot.com/
This disclaimer must be intact and whole. This disclaimer must be included if a project is distributed.
All information in this blog, or linked by this blog, are not to be taken as advice or solicitation. Anyone attempting to replicate, in whole or in part, is responsible for the outcome and procedure. Any loss of functionality, money, property or similar, is the responsibility of those involved in the replication.
All digital communication regarding the email address firstname.lastname@example.org becomes the intellectual property of Brian McEvoy. Any information contained within these messages may be distributed or retained at the discretion of Brian McEvoy. Any email sent to this address, or any email account owned by Brian McEvoy, cannot be used to claim property or assets.
Comments to the blog may be utilized or erased at the discretion of the owner. No one posting may claim claim property or assets based on their post.