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Monday, 17 June 2019

Thermochromic/ photochromic inks

5 Posts

Friday 17 July 1998 1:00:00 am

I would like to know how to prevent these inks from fading after repeated washing?

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Monday 10 August 1998 1:00:00 am

Many causes may underlie the fading of thermochromic textile printing inks after repeated washing of the textiles. Some thermochromic organic pigments are sensitive systems, the thermochromic function of which may be impaired by moisture, oxygen, chemicals or even just by the binder. For applications in textile printing inks, they are thus preferably used in microencapsulated form in order to protect them from such influences. Nevertheless, the textile print is inevitably subject to damage as a result of the stresses to which the textiles are exposed during wearing and washing (detergents, heat, moisture, mechanical stresses). If the protective action of the microcapsules is simultaneously impaired, the thermochromic pigments are inevitably also damaged and their functioning degraded. If thermochromic printed images are to be kept from fading, it would thus be advisable only ever to subject the textiles to "gentle washing", i.e. mild detergents, low washing temperatures, no rubbing or brushing. This approach does not, however, always meet with success. Given the large number of existing thermochromic systems, other causes may also play their part. It is also conceivable that, due to limited reversibility, the thermochromic function of the pigments is subject to fatigue, resulting in fading of the colour. In this case, the effect is attributable to secondary reactions of the pigments during the thermochromic transformation, which will occur irrespective of washing. The only way round this is to use thermochromic pigments or systems having greater reversibility.

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Thursday 31 December 1998 1:00:00 am

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Thursday 31 December 1998 1:00:00 am

I am searching since a lot of time a manufacturer of encapsulated thermochromic pigments fit for paper printing and textile printing ink.
We need to check in our lab the tech aspects and characteristics of these pigments.

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Monday 14 July 2003 1:00:00 am

Dear Sir / Madam,
We have been supplying Security & Specialty inks as follows :
a. Thermochromic ink(reversible, irreversible) b. Photochromic ink
c. Thermochromic Liquid Crystal ink d. UV-Phosphour ink
e. IR ink f. Fluorscent ink(Numbering ink)
g. Magnetic ink h. Conductive ink
i. Fugitive ink j. Optical Variable ink
k. Solvent Reactive ink l. Chemical Reactive ink
m. Coin ink(Rubbing ink) n. Other Security and Specialty ink
o. Hydrochromic ink p. Organic Phosphour ink
q. UV-IR Absorbing ink r. Blacklight ink
s. Piezochromic ink t. Electrochromic ink
u. Optoelectrochromic ink v. Flavour & Flavour ink
w. Phase Change Material x. Glow in the dark ink
Our comapny details are as follows :
1. Name of company : Chromagen Corporation
2. Address : #202, 218-11, Jangwi 1-Dong, Sungbuk-Ku
Seoul Korea 136-834
3. Tel : +82-2-943-1685
Mobile : +82-(0)16-9816-8580 ( 24 hours open )
4. Fax : +82-2-472-9107
5. E-mail : chromagen@yahoo.co.kr
If you need further information, please do not hesitate to contact me at any your convenience.
Best regards
P. Lucas
CTO
Chromagen Corporation

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Wednesday 07 May 2008 1:00:00 am

Hi ,Dear All . I am rachel .We could supply you Thermochromic pigment and Photochromic pigment. Please contact me directly at : rachel08141@hotmail.com

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