(Update04) Back to thermochromic

 
Back to Thermochromic
 
 
Discussion:
 
It seems that my previous work was just to prove to myself that we can only use the pigment that could be applied on to textile, which again limit me back to thermochromic material.
After discussing with Andre and Roshan,  they also agree that we should start with thermochromic inks.
 
I read throught Lai sha's previous work into detail again:
- She was using the thermochromic leucodye ink for print.
- The heating element was initially made of pure resistor. I think after the demostration she started to use conductive yarn, but there was no record about it.
- She indicates that conductive ink was too expensive to deal with.
 
Since we choose to start with thermochromic ink:
- we should use conductive yarn as heat sensitive module to transfer heat, and explore further how thermochromic ink work together with conductive yarns.
- mix up different colour type of thermochromic inks to see the colour changing effect, see whether we can achieve any unexpected multi-colour effect.
- think about the textile layout design.
 
 
 
 
Summary of infomation provided by Lai Sha's past work
 
Thermochromic Ink Company
 
1. Artrend @ Hk
 
2. Matsui Shikiso Chemical
    - Janpanese Chemical Company
    - no LC thermochromic pigments for textile. Only thermochromic leucodye available.
    - 50kg for each color, no texitile processing.
    - difficult for their product to achieve sharp color when mixing up.
    - the activation temperature is not prompt, for example, for a ink whose activation temperature is at 27°c, the ink would start to change disappear at a temperature of 23°c and would completely disappear at 31°c
    - the ink is for cotton only
 
3. B&H colour
    - Contact personnel: Sarah (business development manager)
    - difference between dye ink and print ink:
        - dye ink: ink within the fiber
        - print ink: ink on top of the fiber, same as screen printing.
    - 1kg ~ 1 liter
    - suitable for any textile
 
4. Chromatic technologies
    - contact personnel: David
    - color and activation temerature:
        - custermized: $250/half gallon (3 weeks)
        - standard: activation temperature: 15, 29, 31 and 45c, $200/gallon
    
 
Conductive Ink Company
 
1. Creative Materials     
    - Contact personnel: Joe@US
    - 112-48 with 20(ohm/square/mil) and 112-47 with 25,000 (ohm/square/mil) resistance
    - Ink can be applied directly onto textile
    - NOTE: the conductive with the silver filler has very low resistance, and won't be able to heat up
    - thermochromic ink should have roughly the same drying temperature or could be hotter, this is because I will have to dry the conductive ink before I apply the layer of thermochromic ink, and to dry the thermochromic ink again. 
    - use 5 min at 125°c for curing even for the mixed ink, make sure the even coating, so that the heat could be evenly distributed. 
    - $450/500g. two week processing. 3-4 days of shipping
 
2. Jetrion (Precisia)    
    -  Carbone conductive ink $650/kg and silver filled $750/kg
    - The color of the two is black and greyish silver respectively
 
 
Conductive Yarn Company
 
1. Statex Shildex (Germany)
    - no website
 
2. Wools(New Zealand)
 
3. ARACON  DuPont (http://www.micro-coax.com/
5. ubik@shaw.ca (http://members.shaw.ca/ubik/thread/questions.html)
         - 1ohm/cm
 
6. shieldex@rochester.rr.com (shieldextrading.com) Shieldex Trading GmbH
4502 Route 31 Palmyra NY 14522 USA
Tel: +1 315-597-6687 Fax: +1 315-597-6687

7. statex@easy-online.net (statex.com) Statex Productions & Vertriebs GmbH
Querlandstraße 6b 28357 Bremen Germany
Tel: (++49)421-275047/8 Fax: (++49)421-273643

8. info@marktek-inc.com (http://www.marktek-inc.com/conductivefibers.htm) 37 Shady Valley Dr. Tel: 314-878-9190
Suite B Fax: 314-878-9558
Chesterfield, MO 63017 Email: info@marktek-inc.com  
 - sample of  0.5ohm/cm.  $180/pound, 30-50meters yards/pound.
 
 
 
 
 
 
 
 
 
 
 
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