Q1: Can thermochromic temperature activated pigment be used on the ceramic cup?
Description: I am a mug creative factory, a customer needs to print photos on the cup and then touch it to display it? How do I achieve this effect?
Answer: Use the Kingchroma series of black thermochromic temperature activated pigment powder, spray it on the cup. Or use black thermotropic vermicelli to print on the film. The pattern is transferred to the ceramic cup by thermal transfer.
Both of these ways can make the cup achieve the effect you want.
Q2: How many degrees of thermochromic pigment powder is usually appropriate for thermochromic clothes?
Description:Recently, temperature-sensitive and color-changing clothes are best sellers in clothing industry. They become fashion clothes for young people. When the manufacturer is making temperature-sensitive and color-changing clothes, what is the most suitable thermochromic pigment powder?
Answer: It is recommended that thermochromic pigment powder with working temperature of 20-33℃ is the most suitable for making temperature-sensitive and color-changing clothes. This is because human body temperature is about 37℃. Kingchroma thermochromic pigment powder can effectively show the pattern after temperature change.
We recommend the thermochromic pigment powder made by Kingchroma for making temperature-sensitive and color-changing clothes. Kingchroma thermochromic pigment powder has passed EN-71 and ROHS tests. It does not contain any matters that are harmful to human health. At the same time, it accords with the packing specifications for safe toys and food. It is a good choice for making color-changing clothes.
Q3: How can thermochromic powders be used in anti-counterfeiting technology?
Description: I need to make a batch of anti-counterfeit materials whose color changes with temperature. Can I use the thermochromic powder? Is there any case of application in anti-counterfeit technology?
Answer: Anti-counterfeit technology is a unique function of thermochromic powder. Such anti-counterfeit technology is based on the color-changing requirement of the thermochromic powder. Thermochromic powder can quickly change its color with the change of ambient temperature, bringing a dynamic color effect on the colored object.
Q4: Thermochromic dye powder to adjust the water-based pulp printing cloth what are the common problems?
Description: Many customers use thermochromic dye powder to prepare water-based paste printing cloth. However many customers encounter different problems during the use of thermal powder. Today we will analyze it.
Answer: I. If we use thermochromic dye powder to prepare water-based paste printing cloth at 33℃, we should put two bolts of cloth in an air-conditioned room, so that it will present the desired color.
Possible causes
- Thermochromic powder is exposed to sunlight or UV lamp light, causing poor effect of color change;
- The microcapsule loses efficacy at high temperature, resulting in poor effect of color change. In such cases, the effect cannot be recovered.
II. After the use of the thermal paste and thermochromic powder, the thermal paste becomes rough after it is printed by 150 mesh. When we add thermochromic powder to the paste, the ratio of color change is around 8% and there are some residues.
Solutions: Make the mesh smaller and use 180 mesh, and change the added proportion of thermochromic powder as 6%.
Q5: What is the additive ratio of thermochromic pigment powder for thermochromic printing ink?
Description: Thermochromic pigment powder has the function of repeated color change. Therefore, it is also widely used in clothing screen printing. Do you know the mixing ratio of the thermal powder when it is used for screen printing? Today, we will tell you the mixing ratio of the thermochromic pigment powder to printing ink.
Answer: Temperature-sensitive and color-changing screen printing is a typical example of invisible screen printing. For temperature-sensitive and color-changing screen printing, thermochromic pigment powder enables the color of pattern to change with temperature. Substances whose color changes with temperature include inorganic substances and organic substances. Most temperature-sensitive and color-changing substances used for textile products are organic substances.
Kingchroma thermochromic pigment powder contains microsapsule color-changing particle with a size of 1-10um. It is resistant to high temperature and oxidation. Therefore, the adding proportion of thermochromic pigment powder for preparing thermal paste is 3%-12%. If an ordinary pigment and a color-changing pigment are required for color matching, the dose of ordinary pigment (or dye) should account for about 0.5%-2.5% of the amount of color-changing pigment.
Q6: What do I need to pay attention to when using temperature change powder in injection molding?
Description: I am a mobile phone shell manufacturer. Recently, we developed a color-changing mobile phone shell. It is able to sense the change in ambient environment and produce the effect of color change. The principle is that we add temperature change powder during the production of mobile phone shell, and thus we can produce the mobile phone shell with the effect of color change. We encountered some problems during the machining process of mobile phone shell, one of which is injection molding. What issues should be addressed in terms of the injection molding of the temperature changing powder?
Answer: We should pay attention to the following matters:
- Processing temperature for injection molding of temperature change powder: Processing temperature is one of the factors that affect the effect of the temperature change powder.
- When we use color-changing pigments for injection molding and extrusion, we should not add other packing materials or ordinary pigments (such as titanium dioxide, calcium carbonate, barium sulfate, and carbon black) to the plastic. Otherwise, they may influence the using effect of temperature change powder and hide its color-changing effect.
- Select cross-linking agent or curing agent carefully: During the cross-linking and curing of epoxy resin and unsaturated polyester resin, a great shrinkage stress may sometimes produce inside them, causing the shell of temperature changing powder microcapsule to break. As a result, other chemical substances will go into the pigment, causing it to lose color-changing property. This is often the case when the curing thickness of epoxy resin is more than 0.2mm and polyamine curing agent is used.
Q7: When using thermochromic pigment for screen printing, What should we be mindful of?
Description: Thermochromic pigment product is a type of microcapsule composed of an organic coloring system with a special chemical structure. The particles of this pigment are spherical in shape, with an average diameter of 2-10 micrometers (one micrometer is equivalent to one-thousandth of a millimeter). The inside is a substance that causes discoloration, and the outside is a clear shell that is around 0.2-0.5 microns thick and cannot dissolve or melt. It is this shell that protects the discoloring substance from the erosion of other chemicals. To protect the discoloring substances inside, what should we keep in mind while performing screen printing with thermal powder?
Answer: The following are some tips to keep in mind when doing screen printing with thermochromic pigment:
1. Preparation of printed items: Make sure the surface of printed items is clean, flat, and free of grease or other dirt. You can wipe the surface with cleaning agents or alcohol to guarantee the powder adheres firmly.
2. Selection of screen: Choose an appropriate mesh screen that matches the thermal powder’s size to achieve the desired printing effect. (It is recommended to choose 120-180 mesh)
3. Tension of screen: Make sure the screen tension is right. Incorrect tension, whether too high or too low, can impact the quality of screen printing.
4. Temperature control: The thermal powder is sensitive to temperature, so it’s crucial to control the temperature of the screen printing machine. High or low temperatures can cause temperature changes that are not satisfactory. We should regulate the temperature based on the properties and specific needs of the thermal powder.
5. Pressure control: During screen printing, use enough pressure on the screen to print powder evenly.
6. Printing speed: Manage the printer speed carefully, to guarantee smooth printing of thermal powder and avoid undesirable outcomes resulting from excessive acceleration or deceleration.
7. Cleaning screen: Clean the screen immediately after printing to avoid thermal powder clogging the screen holes.
8. Quality monitoring: Regularly monitor quality and analyze samples to make sure that printing results are stable and consistent.
The above are some key points to pay attention to during the screen printing operation of thermochromic pigment powder. Depending on the specific requirements of thermal powder products and screen printing machines, you also need to refer to their specific operating instructions and technical requirements.
KingChroma is a professional thermochromic pigment manufacturers and thermochromic pigment suppliers. We can meet your project’s needs. Please contact us if you need it(sales@kingchroma.com).