Archive for the ‘Experiments’ Category

Findings on Clamps

April 6, 2014 Leave a comment

Somehow I got obsessed with clamps today. The other day I saw a report on TV about pain assessment with a so called Algometer. There a special press is used to compress a finger until the patient says it is starting to feel painful. This is called the “pressure pain threshold test”. Since the area of the press and its pressure is known a numerical value can be given for this pain threshold. Same goes for temperature. I found a report where they tested at which temperature a hotplate is so painful, the the test subject needs to get their hands of. They found 47 °C for woman and 50 °C for man. Maybe I will access this topic later in the context of candles and wax play.

Back to the clamps. Through googling I found that they also use standardized clothes pegs on the earlobe for this pressure pain threshold test. Does testing clamps on the earlobe sound as familiar to you as for me? All right. So their test clothes peg did have an clamping force of 10 N and an area of 100 mm², hence a pressure of 0.1 MPa on the tissue of the earlobe. In our circles clothes pegs are not known for their excruciating pain. So, how about other clamps? REAL clamps used in BDSM.


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Categories: Experiments Tags: ,

Not So Conductive Electro Conductive Silicone

February 7, 2010 5 comments

Sometimes there are things that aren’t working as intended. Inspired by some other works I tried to make electro conductive silicone myself. Highly motivated I mixed some 2 component silicone and  added graphite carbon powder used for lubricate doors. Scientist I am a series with different ratios of graphite and silicone was made. Since I lack a decent scale I went with volumetric ratios ranging from 10 parts silicon with 1 part graphite (10:1) to 1:2.

In the end it turned out to be not that easy. All silicone blocks were as insulating as one would expect for silicone. The graphite makes a appealing finish though. Deep black with a nice sparkling effect. For high ratios of graphite powder the silicone gets quite hard and the cut face will release graphite and you’re getting black fingers. But unfortunately no conductivity. Not even mega ohms.

Maybe one has to try even higher ratios of carbon graphite powder. An other direction for further experiments could be the grain size of the carbon powder. The commercially available electro conductive silicone shows no sparkling so the powder seems to be much finer.

Categories: Experiments Tags: ,
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