(Update07) Recent updates

A summary of current process:
1. was contacting B&H colour ink company. we were initially informed that they have liquid crystal ink for textile, which means multiple colour change effect can be realised. However, In the end, I was disappointed to know that they can not make it. Thus we still have to stick to normal thermochromic ink in the end this time. Hopefully the ink would be arriving within next week.
    The activation temperatures of Red, Green, Blue are 15c, 31c and 49c respectively. we will print it overlayed to see whether the colour will fade one by one, thus to realize multicolour effect.
2. Jayath showed us his peltier temperature control module. It has flexible temperature change range, and reacts fast. the temperature change module will be thermal isolated from the wearer, thus we do not have to worry since the wearer will not feel it.
    I am thinking of a practical way to combine Jayath's work to my design. If it is possible to duplicate his heating module to make a matrix,  thus i would be able to control the temperature of different grids seperately.
3. Meanwhile I am starting to work on the method use conductive thread. It is proven that the sewing machine can not be operating with conductive thread. Seems that I need to sew it myself.
Oct 30
1.  The purchase of the thermochromic ink is proceeding so slow, far out of my expectation.
2.  Andre and I tried the conductive thread method.
     The heating up of the conductive thread is quite slow, and the temperature variance is not so obvious.
      While applying voltage upto 10 volts to some 20cm of the conductive thread, it burnt.
3.  We also printed a matrix pattern with the currently available thermochormic inks(deep red and magenta) left by Laisa in the lab. However, the printed pattern does not pocess thermochromic     
     characteristic already.
     probably  due to 1. wrong printing method. (But james say should be just normal screen printing)
                                    2. or the ink has already expired due to oxidation.
4.  Since the peltier module can be scale down to at least 4mm*4mm, which is available @ customthermoelectrics
      It would be practical to apply it under the grids.
    HB is a peltier manufacture based in China,
    The smallest size they have is 15mm*15mm. @ $3.56
    will contact them to check whether the size of the peltier module can be customized.